How do the SCM5B49 and SCM5B41 differ?

Does Signal COM (SCOM) connect with Power Ground (COM)?

Can the SCM5B41-09 withstand 300V input without damage?”

Are non-Dataforth 5B modules compatible with Dataforth backpanels?

How do the SCM7B22 and SCM7B41 differ?

Where do I download MAQ20 configuration software?

Can you make SCM5B45-08 with +/-5V output?

Do you have replacement terminal blocks for DSCA and DSCT modules?

What is the function of backpanels for signals?

Am I right in assuming that the 8B modules cannot be Re-Calibrated in the field or by Dataforth?”

Is an external conversion resistor required in order to use the DSCA42 module?

Does the SCM5B32 module require SCMXR1 resistor?

How to select USB to RS-232 adapters for DTF products?

Does Dataforth have a 4-channel 4-20mA isolator?

Can you explain how to use the DIP switches on SCM5B48 to achieve different settings?

What are the MAQ20-COM2, -COM4 RS-232, RS-485 pinouts, respectively?

How do I connect the 5B45 to the field signal?

In DC Digital Output Modules, does Dataforth have any with Iout > 3A?

On a DSCAxx-xxC, -xxE, is an external load resistor required in order to convert the output loop current to a voltage?

On DSCA’s, what are the zero and span adjusters physically?

Does MAQ20 have the capacity for OPC?

With the SCM5B33-06 and SCM5B33-07, what are the included jumpers for?

Can you explain what is the difference between the “Standard frequency range” and the “Extended frequency range” for the DSCA33 module?

I have a Thermocouple input module, do I need a Cold Junction Compensation sensor?

Can the DSCA modules be Re-Calibrated in the field?

I have three MAQ20 placed in three different buildings, is it possible to connect the device to the ADSL network?

Is the optional plug-in conversion resistor required in order to use the SCM7B32 module?

For DSCA49 modules when I give LabVIEW (or other DAQ software) an output command, I get no output from terminals 3 & 4, why?

Is the optional plug-in conversion resistor required in order to use the 8B32 module?

I have an SCMPB07, does Dataforth have a 4-channel SCM5B backpanel?

Why do I get no output on an 8B backpanel from an 8B input module?

What is the recommended torque for DSCA screw terminals?

Does SCOM 0 to xx (15 max) connect to one signal common COM?

What is the total power consumption of the 5B backpanel?

Do you know if the SCM5B33 can read the current / voltage for a system operating at 16.66 Hz?

How do I troubleshoot a set-up with 100 Ohm Platinum RTD while using it with DSCA34-01 input module?

I cannot see the IP address in the Modbus registers in DHCP mode. Where do I find it?

Can I communicate between a two LDM Converters / Line Drivers without DTR (Data Terminal Ready) control signal?

For SCMD-PB Digital I/O Backpanels, does Dataforth sell edge card connectors?

Can the 8B41-12 withstand 300V input without damage?

Can you explain what is the difference between the “Standard frequency range” and the “Extended frequency range” for the 8B33 module? I don’t see an option to order different module type so how are the two frequency ranges accessible to the user ?

Is a plug-in conversion resistor required in order to use the SCM5B42 module?

Can SCM7B22 drive +/-10V, 2.5mA input with 0-200Hz sine wave?

Is an external conversion resistor required in order to use the SCM5B32 module?

Is the optional plug-in conversion resistor required in order to use the 8B42 module?

Does Dataforth have any modules with continuous data streaming?

On a DSCAxx-xxC, -xxE, is an external power supply required in order to provide output loop current?

For a half-wave rectified sine, Crest Factor = 2, in a DSCA33, which additional error spec do I apply; the one for Crest Factor 1 to 2 or 2 to 3?

I have an 8B33 module, what is the accuracy error between 0-5% span?

What is DSCA32 output resistance?

Can I use the SCMVAS-Mxxx modules standalone?

Unhandled exception error in the installation process of ReDAQ Shape in Win XP

How to re-calibrate 8B45 modules?

Could you explain, what is the main difference between the DSCA41 and the DSCA49?

What are the Modbus mapping details to use for PID control features like set point address, tuning parameter details, alarms, etc.?

Can I use the SCMVAS-Mxxx modules standalone?

For SCM7B22 modules when I give LabVIEW (or other DAQ software) an output command, I get no output from the backpanel, why?

How do I find SLX940 ReDAQ Shape Software?

For 8B49 modules when I give LabVIEW (or other DAQ software) an output command, I get no output from the backpanel, why?

How much does the SCMXPRT-003 weigh?

Is an external conversion resistor required in order to use the DSCA32 module?

What is the total power consumption of the 8B backpanel?

I have an SCM5B33 module, what is the total power consumption?

Is there a drawing which can help me locate the SCM9B mounting holes?

Can MAQ20-BRDG1 support a strain sensor such as a load cell, can it measure stress?

Is there an extra charge for the extended frequency range to 20kHz for a DSCA33-01C?

We have a lot of 5B racks that I would like to use, but I am not sure how to purchase the 34 conductor ribbon cable that these older 5B racks use. Do you guys sell the connectors and cable that I would need for the 16 channel 5B rack

Can any Dataforth products be powered from a USB port?

Why do I see a -10V shift when I change to a DSCL23 from a DSCA42-01C or similar?

SCM7B – why are there many bipolar input models, but a lot fewer bipolar output models offered?

Can LDM and DCP devices send-receive Modbus communications?

Can you explain what is the difference between the “Standard frequency range” and the “Extended frequency range” for the SCM5B33 module?

How do I mount and remove a DIN rail module?

I looked into the SCMVAS-Mxxx modules, but are they truly DC Voltage Attenuators?

In the SCMD-MIDC5 manual, the maximum output voltage is 30V; if +Vcc is only 5V, how could output voltage be 30V and logic voltage 6V?

Do the SCM9B-A1000 & SCM9B-A2000 have DIN rail mounting?

What is the max operating output current for SCM5B input modules?

On 5B backpanels, what is the threaded bolt connected to?

What is the ECCN classification of Dataforth products?

Does Dataforth have an isolator with one input featuring two or more outputs?

With RS-485 communicating to SLX200 I get timeout errors.

On the 8B51, can I apply the + and – input leads “backwards” to reverse the polarity of the output signal?

For SCM5B39 modules when I give LabVIEW (or other DAQ software) an output command, I get no output from the backpanel, why?

I’m having trouble getting the DCP35 to communicate with a datalogger.

What are feasible failure modes of the SCM5B36 and SCM5B41 devices?

Are these iso amps used in the same way as op amps when amplifying signals (G = 1 + R2/R1)?

What is the total power consumption of the 7B backpanel?

How do I register / unregister modules in a MAQ20 system?

I have an SCM5B33 module, what is the accuracy error between 0-10% span?

What is the output resistance, how does the filtering work and what are the overshoot characteristics for a 8B51-03?

Is there an 8B module which can accept up to +/-50V, has >10k input resistance, <100 Ohm output resistance and can be sampled up to 250kHz?

Do SCM7BP02 and SCM7BP04 have CJC sensors installed by default?

Is an external conversion resistor required in order to use the DSCT32 module?

The SCM5B42 can function as an SCM5B32, why can't the 8B42 function as an 8B32?”

Can terminals 6 & 8 on DSCP62 be connected together without damaging the unit?

ATEX conformity: Is it possible to use the DSCA38-12C in zone IIC (hydrogen)?

Is PT3E an industrial or a commercial product?

What are the dimensions of the SCM9B series of modules?

Does Dataforth offer SCM5B48 modules with customized fixed-parameters?

Do I need a PC connected to Record to MAQ20 SD Card?

I need mV in V in modules with Bw>20kHz.

What is the max sample rate for MAQ20 modules?

Is MAQ20-940, ReDAQ Shape, an electronic download only or is it also on DVD, flash drive?

8B backpanels: Are these products ESD sensitive? And if so, should the product be in sealed static shielding bags, and not an “Antistatic” bubble wrap, when shipped?


How do the SCM5B49 and SCM5B41 differ?
The major difference is the SCM5B41 is an input module and the SCM5B49 is an output module.
This means that.
The 5B41 module has its input on the isolated field side of the module connect to it through screw terminal blocks. The 5B41 module has its output on the system and power supply side of the module connect to it through ribbon cable connector (SCMPB01, SCMPB02, SCMPB05, and SCMPB06) or screw terminal blocks (SCMPB03, SCMPB04, and SCMPB07).
The 5B49 module has its output on the isolated field side of the module connect to it through screw terminal blocks.
The 5B49 module has its input on the system and power supply side of the module connect to it through ribbon cable connector (SCMPB01, SCMPB02, SCMPB05, and SCMPB06) or screw terminal blocks (SCMPB03, SCMPB04, and SCMPB07).

Keywords/Phrases: 5B, 5B module, 5B input module, 5B output module, 5B41, 5B49
Does Signal COM (SCOM) connect with Power Ground (COM)?
Yes, Output Ground Common (SCOM in DB-25 & COM in screw terminal blocks) is the same as Power Ground Common (COM in Main Power & Alternate Power screw terminal blocks).
This is true for 8BP01, 8BP02, 8BP04, 8BP08, and 8BP16.

KEYWORDS/PHRASES: SCOM, COM, 8BP01, 8BP02, 8BP04, 8BP08, 8BP16, common, signal common
Can the SCM5B41-09 withstand 300V input without damage?”
The SCM5B41-09 module can withstand 300VDC continuous on its input terminals without damage. However, the output voltage will go to one of the internal power supply rails and remain there for several seconds after the input returns within the specified +/-40V input range
Are non-Dataforth 5B modules compatible with Dataforth backpanels?
Yes, as long as the 5B module is compliant with or exceeds Analog Devices Incorporated 5B specifications.

Keywords/Phrases: 5B, 5B module, backpanel, Dataforth backpanel
How do the SCM7B22 and SCM7B41 differ?
The main difference is the SCM7B41 is an input module and the SCM7B22 is an output module.
This means that.

The 7B41 module has its input on the isolated field side of the module connect to it through screw terminal blocks. The 7B41 module has its output on the system and power supply side of the module connect to it through DB-25 connector (SCM7BP01, SCM7BP02, SCM7BP04, SCM7BP08, and SCM7BP16).

The 7B22 module has its output on the isolated field side of the module connect to it through screw terminal blocks.
The 7B22 module has its input on the system and power supply side of the module connect to it through DB-25 connector (SCM7BP01, SCM7BP02, SCM7BP04, SCM7BP08, and SCM7BP16).

Keywords/Phrases: 7B, 7B module, 7B input module, 7B output module, 7B22, 7B41
Where do I download MAQ20 configuration software?
MAQ20 configuration is best performed with ReDAQ Shape software. We do have other software for download as well. Please check out the Software Download Center.

Note:The "MAQ20-945 Configuration Software Tool" was replaced with ReDAQ Shape software tool in 2017.

Related Links

Can you make SCM5B45-08 with +/-5V output?
This requires a custom designed module; we typically offer a single module custom solution with unit pricing for the required 10 piece minimum order and 7-8 week lead time. Please contact Dataforth at (520) 741-1404 if your application requires a non-standard range not offered in our product catalog.

Often times, a two module solution can help achieve the required output range. In the aforementioned case of the 5B45-08, one would connect its output to a 5B49-01 thus yielding a +/-5V output. Note that the accuracy specs will be additive across the two modules.
Do you have replacement terminal blocks for DSCA and DSCT modules?
Yes. Replacement terminal blocks are the following.

DSCAX-01 labeled 1 2 3 4.

DSCAX-02 labeled 5 6 7 8.

Keywords/Phrases: DSCA terminal blocks, replacement terminal blocks, DSCA replacement terminal blocks, DSCT terminal blocks, DSCT replacement terminal blocks
What is the function of backpanels for signals?
Think of the backpanel as a bidirectional signal transfer device whose direction is determined by the module in a particular channel.
For an input module, the signal is transferred from the field-side screw terminals to the system/power supply-side screw terminals or to a signal access ribbon cable header or D-sub connector.
For an output module it is just the reverse, the signal is transferred from the system/power supply-side screw terminals or from a signal access ribbon cable header or D-sub connector to the field-side screw terminals.

Keywords/Phrases: backpanel, 5B backpanel, 7B backpanel, 8B backpanel, SCMD backpanel
Am I right in assuming that the 8B modules cannot be Re-Calibrated in the field or by Dataforth?”
Dataforth modules are all designed to be highly stable, thus they do not require re-calibration.

8B modules cannot be re-calibrated in the field, but they can be re-calibrated by Dataforth.

We do offer a re-calibration service. For details, please contact sales by email at sales@dataforth.com or by phone at 1 800 444 7644 press 1 for Sales.
Is an external conversion resistor required in order to use the DSCA42 module?
No, an external conversion resistor is not required in order to use the DSCA42 module. The current/voltage conversion is achieved by an internal resistor as shown in the block diagram in the data sheet.

Keywords/Phrases: DSCA42, internal resistor, external conversion resistor
Does the SCM5B32 module require SCMXR1 resistor?
Please the SCMXR1 is installed in the back panel; one XR1 is usually shipped with the unit. If you can't locate it, please call Dataforth at 1-800-444-7644.
How to select USB to RS-232 adapters for DTF products?
Contemporary computers do not have RS-232 ports, but USB ports instead. However, there are many USB to RS-232 adapters available.
If the adapter is to be used with a device which uses the Modbus protocol or will be installed in a system which uses the Modbus protocol, the adapter must either be specified for use with Modbus or must be tested on a Modbus device for proper communications functioning.


Selection criteria for Data Acquisition products:

MAQ20-COM2, SLX300-10

These devices have USB ports. If an additional communications channel is needed, a USB RS-232 adapter can be used. The adapter in this case does not need handshake signals included.
These devices both use the Modbus protocol.

Selection criteria for Data Communications products:

DCP485, LDM70, LDM85, LDM422, LDM485

These devices are externally powered and use transmit data, receive data, and ground for communications, and use various handshake signals to control particular functions. Refer to the specific user manual in the Media Attachments area to the right of this Content main body for usage instructions.

DCP35, LDM35, LDM80

These devices are powered from the handshake and the transmit and receive data signals.
The adapter in this case should have the handshake signals included.
If the adapter does not have handshake signals included, use it for the transmit and receive data signals and power the device handshake inputs from separate positive and negative power supplies.
Since the adapter could be installed between two computers and either one could initiate a data transfer, the adapter should be able to allow not only the USB side but also the RS-232 side to initiate the data transfer.

LDM30

This device is externally powered and uses only transmit data, receive data, and ground for communications. RTS is connected to CTS internally. DTR, DSR, and RLSD (DCD) are connected to each other internally.
The adapter in this case does not need handshake signals included.
If there is a system requirement for handshake signals, then choose an adapter with handshake signals included.

Selection criteria for Signal Conditioning products:

SCM9B-A1000/A2000

These devices are externally powered and use only transmit data, receive data, and ground for communications. Handshake signals CTS, DSR, and RLSD (DCD or CD) are internally biased to their asserted state or high state, a positive voltage.
The adapter in this case does not need handshake signals included.
If there is a system requirement for handshake signals, then choose an adapter with handshake signals included.
Does Dataforth have a 4-channel 4-20mA isolator?
No. However, Dataforth does have two and three-channel 4-20mA isolators as shown in the following table.

Model Description
DSCL22-11 2-channel 4-20mA isolator
DSCL22-21 3-channel 4-20mA isolator
DSCL23-02 2-channel 4-20mA Isolator with DC Supply for 2-wire transmitter
DSCL24-11 2-channel 4-20mA isolator

Keywords/Phrases: 4-20mA isolator, 4-channel 4-20mA isolator, 4-channel 4-20mA DIN mount isolator
Can you explain how to use the DIP switches on SCM5B48 to achieve different settings?
Below are the SCM5B48 configurable parameters and their associated DIP switch designators in the order they appear left to right in the data sheet, Figure 2: SCM5B48 Side Label.

High Pass Filter, S5: DC, 0.2Hz, 10Hz

Switch S5 selects between DC coupling or AC coupling and between 0.2Hz or 10Hz low end of the High Pass filter cutoff frequencies.

Gain, S4: 1, 10, 100

Switch S4 selects from among the Gain settings = 1, 10, or 100. Since the output range is a fixed +/-10V -01 or +/-5V -02, the implication of this is that switch S4 actually selects the input voltage range as in the formula Vin = Vin max / G. Example: in an SCM5B48-01, S4 =10 the input voltage range is Vin = +/-10V / 10 = +/-0.1V.
Keep in mind, for DC coupling Vout = VAC + VDC which is limited to +/-10V total for -01 and +/-5V total for -02.

Excitation, S1: 4mA, 9mA

Switch S1 selects between excitation current sources of 4mA or 9mA +/-10%. They both have a compliance voltage of 24V +/-10%.

Low Pass Filter, S3, S2: 2.5kHz, 5kHz, 10kHz, 20kHz

Switch S3 and S2 select from among the Low Pass filter cutoff frequencies of 2.5kHz, 5kHz, 10kHz, or 20kHz.


Keywords/Phrases: SCM5B48, SCM5B48 DIP switches, SCM5B48 settings

What are the MAQ20-COM2, -COM4 RS-232, RS-485 pinouts, respectively?
To connect to the MAQ20 COMx, open or download the MAQ20-COMxPinouts page from the Media Attachments box to the right of this Content box.
Table 2 shows the pinouts of the RJ-45 jack for RS-232, RS-485 4-wire, and RS-485 2-wire.

Or visit www.dataforth.com. In the top tool bar point to Software, scroll down to and click on MAQ20.
Under Manuals, scroll down to and click on MAQ20 COMx Hardware User Manual.
In Section 4.0, page 3 of 40, Table 2 shows the pinouts of the RJ-45 jack for RS-232, RS-485 4-wire, and RS-485 2-wire.
How do I connect the 5B45 to the field signal?
For Zero Crossing, connect the signal to EXC+ and the return to IN-.

For TTL, connect the signal to IN+ and the return to IN-.

In DC Digital Output Modules, does Dataforth have any with Iout > 3A?
Yes, Dataforth has the SCMD-MODC5ML which can switch up to 5A DC from an off-state voltage up to 50VDC.

The basic data sheet can be found in the Dataforth Full-Line Catalog under SCMD–MOAC/MODC Miniature Digital Output Modules and at www.dataforth.com at the upper left, under Explore our product offerings:, click on Signal Conditioning. Then click on Isolated Digital I/O Modules. In the top center of the next page, click on the Adobe Acrobat symbol to the right of SCMD–MOAC/MODC. At the right edge of the page in a text box labeled Datasheet, click on SCMD Specifications for detailed specifications of all Digital I/O Modules.

Keywords/Phrases: SCMD, SCMD–MOAC/MODC, SCMD-MODC, -MODC, Digital Output Modules, current, high, 3A, 5A
On a DSCAxx-xxC, -xxE, is an external load resistor required in order to convert the output loop current to a voltage?
An external load resistor is required only if the input does not have an internal current to voltage conversion resistor.
Find out the maximum load resistance the output can drive. The maximum load resistance the DSCAxx-xxC, -xxE output can drive is 600 Ohms.
Find out the voltage range the input can accept. Be sure to include the voltage drop at 20mA for the resistance of the length of the lead wires. To calculate the required load resistance, divide the maximum input voltage required by 20mA. The result is the load resistance your application needs to operate properly.

Example: Rin = Vin / 20mA Rin = 10V / 0.02A = 500 Ohms
Lead wire margin allowance example:
Vwire = Rout max x 20mA – Vin Vwire = 600 Ohms x 0.02A – 10V = 12V – 10V = 2V

Keywords/Phrases: DSCA, DSCA current loop output, external load resistor, impedance, ohms
On DSCA’s, what are the zero and span adjusters physically?
The DSCA and DSCT zero and span adjustments are made using trimpots located under the front panel label and are non-interactive for ease of use. The trimpot screw heads are behind perforated circular knockouts labeled Ø and <->. The screw heads are slotted to accept a narrow flat blade screwdriver. The zero and span adjusters are 25Turn trimpots.

Keywords/Phrases: DSCA zero, DSCA span, DSCT zero, DSCT span, DSCA adjustment, DSCT adjustment, trimpots
Does MAQ20 have the capacity for OPC?
OPC is an acronym for OLE for Process and Control, OLE is an acronym for Object Linking and Embedding. A more contemporary meaning of OPC is Open Platform Communications. And, yes, MAQ20 does have a capacity for OPC. Call 800 444 7644 press 2 for details.

Keywords/Phrases: OPC, OLE for Process and Control, Open Platform Communications
With the SCM5B33-06 and SCM5B33-07, what are the included jumpers for?
You install one jumper from the +EXC to the +In terminals and the other jumper from the –EXC to the –In terminals. This allows the traces on the backpanel and the traces in the module to the current shunt to share the excess current.

Keywords/Phrases: SCM5B33-06, SCM5B33-07, included jumpers, excess current
Can you explain what is the difference between the “Standard frequency range” and the “Extended frequency range” for the DSCA33 module?
The user does not have to do anything special; the module operates seamlessly over the full frequency range of 45Hz to 20kHz. We needed to split the full frequency range into two ranges so we could define and specify the different accuracy levels associated with each subrange.
If you look further down the DSCA33 Specifications under Accuracy, you will notice the Standard frequency range from 45Hz to 1kHz carries an additional +/-0.25% Reading error. This error is in addition to the +/-0.25% Span error at 50/60Hz. So the total accuracy error will be +/-0.25% Span + (+/-0.25% Reading) = +/-0.50%.
And the Extended frequency range from 1kHz to 20kHz carries an additional +/-0.75% Reading error. This error is in addition to the +/-0.25% Span error at 50/60Hz. So the total accuracy error will be +/-0.25% Span + (+/-0.75% Reading) = +/-1.00%.

Keywords/Phrases: DSCA RMS, DSCA True RMS, DSCA RMS input module, DSCA True RMS input module, DSCA33
I have a Thermocouple input module, do I need a Cold Junction Compensation sensor?
All Dataforth Thermocouple (TC) input modules need a Cold Junction Compensation (CJC) sensor.

The following TC input modules need an external CJC sensor which is built into the data acquisition system (SLX300) or can be ordered as an option of the data acquisition system (SLX200) backpanel or as a component sold separately.
SCM5B37, SCM5B47, 8B37, and 8B47

The following TC input modules need an external CJC sensor which is built in to the backpanel terminal blocks.
SCM7B37, and SCM7B47

The following TC input modules do not need an external CJC sensor; it is built in to each module.
DSCA37, DSCA 47, DSCT37, DSCT47, DSCP20, DSCP62, and SCTP20

The following TC input modules do not need external CJC sensors; they are built in to each module.
MAQ20-JTC, MAQ20-KTC, MAQ20-TTC, MAQ20-RSTC



Keywords/Phrases: Thermocouple input module, TC input module, Cold Junction Compensation sensor, CJC sensor
Can the DSCA modules be Re-Calibrated in the field?
Dataforth modules are designed to be highly stable, thus they do not require re-calibration.

DSCA modules can be re-calibrated in the field and they can be re-calibrated by Dataforth.
To re-calibrate DSCA modules in the field, download AN801 from the Media Attachments box to the right of the topic main body and follow the instructions.

We do offer a re-calibration service. For details, please contact sales by email at sales@dataforth.com or by phone at 1 800 444 7644 press 1 for sales.”
I have three MAQ20 placed in three different buildings, is it possible to connect the device to the ADSL network?
This should be possible using the Ethernet port on each of the MAQ20 systems and an appropriate DSL modem.
Configure each of the MAQ20 systems with a unique static IP address and then interface to them using ReDAQ Shape for MAQ20 or IPEmotion with the Dataforth Plug-in.

Keywords/Phrases: MAQ20 networking , MAQ20 to ADSL network
Is the optional plug-in conversion resistor required in order to use the SCM7B32 module?
No, the optional plug-in conversion resistor is not shipped with nor is it required in order to use the SCM7B32 module. The current/voltage conversion is achieved by an internal resistor as shown in the block diagram in the data sheet.

Keywords/Phrases: SCM7B32, internal resistors, plug-in conversion resistor
For DSCA49 modules when I give LabVIEW (or other DAQ software) an output command, I get no output from terminals 3 & 4, why?
That’s because the DSCA 49 and the DSCA 39 are output modules, are connected the reverse of input modules, they have their inputs on terminals 3 & 4, the system side (power supply side). They provide their outputs on terminals 6 & 7, the isolated field side.

Keywords/Phrases: DSCA, DSCA module, DSCA output module, DSCA 49, DSCA 39
Is the optional plug-in conversion resistor required in order to use the 8B32 module?
No, the optional plug-in conversion resistor is not shipped with nor is it required in order to use the 8B32 module. The current/voltage conversion is achieved by an internal resistor as shown in the block diagram in the data sheet.

The optional plug-in resistor could be used to shunt off some of the current from the module and allow a larger input current range; then it could also be used with voltage input modules to convert a non-standard current range into an input voltage range.

Keywords/Phrases: 8B32, internal resistors, plug-in conversion resistor
I have an SCMPB07, does Dataforth have a 4-channel SCM5B backpanel?
No. However, a 4-channel DIN mount SCM5B backpanel can be made from the following list of parts.

Quantity Model Description
2 SCMPB04 or SCMPB04-1 2-channel 5B backpanel with SCMXCJC or without SCMXCJC
2 SCMXBEFE DIN mount base element with snap foot
2 SCMXSE DIN mount side element
4 SCMXVS DIN mount connection pins

Or, alternately, if you already have SCMPB04-2 or SCMPB04-3.

Quantity Model Description
1 SCMPB04-2 or SCMPB04-3 2-channel DIN mount 5B backpanel with SCMXCJC or without SCMXCJC

Just add the following.

Quantity Model Description
1 SCMPB04 or SCMPB04-1 2-channel 5B backpanel with SCMXCJC or without SCMXCJC
1 SCMXBEFE DIN mount base element with snap foot
4 SCMXVS DIN mount connection pins
Why do I get no output on an 8B backpanel from an 8B input module?
On the isolated field side of the 8B backpanel, use the shorter screw terminals that are offset to the right and marked “-“ and “+” for the inputs to the module. Use the taller screw terminals that are offset to the left and marked “-EXC” and “+EXC” for modules that provide excitation.

Keywords/Phrases: 8B, 8B module, 8B input module, 8B backpanel
What is the recommended torque for DSCA screw terminals?
0.5Nm to 0.6Nm is the recommended range.

0.6Nm is the max recommended torque, but it is still short of damage to the unit.

KEYWORDS/PHRASES: DSCA, screw terminal, DSCA screw terminal, torque
Does SCOM 0 to xx (15 max) connect to one signal common COM?
All Signal COMmon (SCOM) for all channels are connected to one signal common COM.

This is true for 8BP02, 8BP04, 8BP08, and 8BP16.

KEYWORDS/PHRASES: SCOM, COM, 8BP02, 8BP04, 8BP08, 8BP16, common, signal common, backpanel
What is the total power consumption of the 5B backpanel?
The total power requirement on the 5VDC power rail is the summation of the power requirement of the individual modules as specified in each module specification. For power budget purposes, multiply the total power requirement you calculated by 1.5 for maximum power needed.

Keywords/Phrases: 5B backpanel, power consumption, power requirement, total power, total power requirement
Do you know if the SCM5B33 can read the current / voltage for a system operating at 16.66 Hz?
It is possible, but less than 45Hz requires design of a custom module with 7Hz being the low limit.
Keywords/Phrases: SCM5B33, SCM5B33 low frequency, SCM5B33 lower frequency.
How do I troubleshoot a set-up with 100 Ohm Platinum RTD while using it with DSCA34-01 input module?
Measure the RTD with an ohmmeter. If it is near the specified resistance for its type, then it is likely good.
If an RTD is not available, power the module.
Connect 100 Ohms across terminals 5 and 7 and connect a shorting jumper across terminals 5 and 6.

For DSCA34-01, measure about 5V across output terminals 3 and 4.
For DSCA34-01C, measure about 12mA across output terminals 3 and 4.
For DSCA34-01E, measure about 10mA across output terminals 3 and 4.

Keywords/Phrases: DSCA34, DSCA34 troubleshooting, Pt100, platinum, nickel, RTD
I cannot see the IP address in the Modbus registers in DHCP mode. Where do I find it?
The DHCP assigned IP address cannot be read from the MAQ20-COMx module.
The DHCP assigned IP address can be found if the MAQ20 system is connected to a router as this displays the addresses that the router has assigned.

Keywords/Phrases: DHCP, IP address, MAQ20-COM, router
Can I communicate between a two LDM Converters / Line Drivers without DTR (Data Terminal Ready) control signal?
Yes, two LDM Converters / Line Drivers can be setup to communicate between two remote RS-232 terminals with only TD (Transmit Data), RD (Receive Data) and GND (Ground) signals. The setup is possible only if the communication is Simplex (one-way over two-wires) or Full-Duplex (two-way over four-wires). For Half-Duplex (two-way over two-wires) communication DTR control signal is required.

Short DTR line to RLSD (Received Line Signal Detect) on both end of RS-232 terminals at the LDM connectors. The RS-232 terminals at the LDM is a DB-25 connector. For DB-25 connectors, DTR is Pin 20 and RLSD is Pin 8.

If a DB-9 to DB-25 converter is used at the RS-232 terminal then short Pin 4 (DTR) to Pin 1 (RLSD or DCD - Data Carrier Detect) on the 9-pin connector.
For SCMD-PB Digital I/O Backpanels, does Dataforth sell edge card connectors?
Dataforth does not sell the edge card connectors for the Digital I/O Backpanels, SCMD-PBxxxx. We do offer information about the part numbers and manufacturers of the connectors in the following lines.

Part Number Manufacturer
66317-150 FCI-Berg
3415-0001 3M

This information can also be found in the Dataforth Full-Line Catalog under SCMD Accessories Digital I/O Module Backpanels and at www.dataforth.com at the upper left under Explore our product offerings:, click on Signal Conditioning. Then click on Isolated Digital I/O Modules. In the top center of the next page, click on the Adobe Acrobat symbol to the right of Accessories.

Keywords/Phrases: SCMD, SCMD-PB, -PB
Can the 8B41-12 withstand 300V input without damage?
The 8B41-12 module can withstand 300VDC continuous on its input terminals without damage. However, the output voltage will go to one of the internal power supply rails and remain there for several seconds after the input returns within the specified +/-60V input range."
Can you explain what is the difference between the “Standard frequency range” and the “Extended frequency range” for the 8B33 module? I don’t see an option to order different module type so how are the two frequency ranges accessible to the user ?
The user does not have to do anything special; the module operates seamlessly over the full frequency range of 45Hz to 10kHz. We needed to split the full frequency range into two ranges so we could define and specify the different accuracy levels associated with each subrange.
If you look further down the 8B33 Specifications under Accuracy, you will notice the extended frequency range carries an additional +/-1.375% Span error and +/-3.25% Span error (-06). This error is in addition to the +/-0.25% Span error at 50/60Hz. So the total accuracy error will be +/-0.25% + (+/-1.375%) = +/-1.625% Span and . +/-0.25% + (+/-3.25%) = +/-3.50% Span.

Keywords/Phrases: 8B RMS, 8B True RMS, 8B RMS input module, 8B True RMS input module, 8B33
Is a plug-in conversion resistor required in order to use the SCM5B42 module?
Yes, a plug-in conversion resistor is required in order to use the SCM5B42 module. The current/voltage conversion is achieved by a plug-in resistor, SCMXR1 as shown in the block diagram in the data sheet.
Make sure the XR1 is installed in the back panel. The XR1 is usually shipped with the unit. If you can't locate it, please call Dataforth at 1-800-444-7644.
Can SCM7B22 drive +/-10V, 2.5mA input with 0-200Hz sine wave?
“I am generating a sine voltage signal with frequency range 0-200Hz, +/-10V using a national instruments module NI 9263 with current drive capability of 1mA. The power amplifier I am driving the sine wave generated with has an input impedance of 4K ohms .(so for a 10V sine wave input to the amplifier, it will send 2.5mA to drive it).

I am trying to double check if the SCM7B22 would be suitable for my application since it has output current capability of +/-20mA.”

It was confirmed that the SCM7B22 would be suitable for his application. I also asked him to keep in mind the 7B22 has a 400Hz bandwidth and the filter is already attenuating slightly at 200Hz. At 200Hz, the output amplitude will be about 91.4% of the input amplitude (about 8.6% attenuated).
Is an external conversion resistor required in order to use the SCM5B32 module?
Yes, an external conversion resistor is required for the SCM5B32 module if it is to be used as a current input module. The current/voltage conversion is achieved by an external resistor, SCMXR1 as shown in the block diagram in the data sheet.
The SCM5B32 series without the resistor can be used for voltage inputs as well.
For the SCM5B32-01 that voltage range is: +0.08V to +0.40V.
For the SCM5B32-02 that voltage range is: 0V to +0.40V.

Keywords/Phrases: SCM5B32, internal resistor, SCMXR1, external conversion resistor
Is the optional plug-in conversion resistor required in order to use the 8B42 module?
No, the optional plug-in conversion resistor is not shipped with nor is it required in order to use the 8B42 module. The current/voltage conversion is achieved by internal an resistor as shown in the block diagram in the data sheet.

Keywords/Phrases: 8B42, internal resistors, plug-in conversion resistor
Does Dataforth have any modules with continuous data streaming?
Yes, in the SCM9B series a number of modules can be ordered as continuously data streaming modules. To find out which SCM9B modules can be ordered with the data streaming option, by phone call technical support at 800 444 7644 press 2 or by email at support@dataforth.com. To order a data streaming SCM9B module add a “C” suffix to the model number, example: SCM9B-1251C accepts 4-20mA and provides streaming data on RS-232.

KEYWORDS/PHRASES: streaming, data streaming, continuous data streaming, SCM9B continuous data streaming
On a DSCAxx-xxC, -xxE, is an external power supply required in order to provide output loop current?
No, an external loop power supply is not required in order to provide output loop current. The DSCAxx-xxC and –xxE current output modules have what is known as an active current output. They source the loop current out of their output terminals.

Keywords/Phrases: DSCA, DSCA current loop output, external loop power, external loop supply, external loop power supply
For a half-wave rectified sine, Crest Factor = 2, in a DSCA33, which additional error spec do I apply; the one for Crest Factor 1 to 2 or 2 to 3?
The DSCA33 Crest Factor additional error is specified in several ranges of 1 to 2, 2 to 3, 3 to 4, and 4 to 5. For every whole number Crest Factor 2 and greater, choose the pair with the applicable whole number to the right. That whole number is included in the range or mathematically: <=. The whole number at the left of a range is excluded from the range or mathematically: >.

Keywords/Phrases: DSCA33, Crest Factor, DSCA33 and Crest Factor
I have an 8B33 module, what is the accuracy error between 0-5% span?
In the 8B33 data sheet, Note 4, For 0-5% Span measurements add 1% accuracy error (-02, -03, -04, -05) or 1.5% accuracy error (-01, -06). Accuracy error includes linearity, hysteresis and repeatability but not source or external shunt inaccuracy (if used).

Keywords/Phrases: 8B RMS, 8B True RMS, 8B RMS input module, 8B True RMS input module, 8B33 accuracy, span, offset
What is DSCA32 output resistance?
DSCA32 output resistance is: R out <= 1 Ohm

Keywords/Phrases: output resistance, DSCA32 output resistance
Can I use the SCMVAS-Mxxx modules standalone?
SCMVAS-Mxxx modules are high voltage input non-isolated attenuator modules. If used standalone, the module could potentially allow high voltage through to expensive data acquisition equipment. Therefore SCMVAS-Mxxx modules must be used in conjunction with an SCMVAS backpanel and an SCM5B30-07x or SCM5B40-07x isolation and signal conditioning module with input over-voltage protection.

Keywords/Phrases: 5B, 5B module, SCMVAS, SCMVAS-Mxxx
Unhandled exception error in the installation process of ReDAQ Shape in Win XP
On the Unhandled exception error in the installation process in Windows XP, ReDAQ Shape needs XP updated to SP3 in order to eliminate the exception error. Perform the following steps to clear up this issue.

If you have Win XP and have not installed ReDAQ Shape, perform the following steps.

Update XP to SP3. Use the update link in Control Panel -> System -> Automatic Updates tab -> in the lower part of this window, click on Windows Updates Web site. This takes you to the correct part of the Microsoft web site. Download and install the Critical Updates.

Install ReDAQ Shape V2.11.
Reference ReDAQ Shape for MAQ20 User Manual Sections 1.3 Minimum Host Computer Requirements, 1.4 Installation, and 1.5 License Unlock Code.

End If

If you have Win XP and have installed ReDAQ Shape V2.11, perform the following steps.

Uninstall ReDAQ Shape V2.11.
In this step you have two options. You can use Control Panel -> Add / Remove Programs and remove the USB driver. This might prove to have a level of difficulty because on two different Windows XP machines I have seen the USB driver referred to by two different names: USBXpress… or Windows Driver Package – Silicon Laboratories Ports…
OR you can wait until the Reinstall ReDAQ Shape V2.11 step below.

Update XP to SP3. Use the update link in Control Panel -> System -> Automatic Updates tab ? in the lower part of this window, click on Windows Updates Web site. This takes you to the correct part of the Microsoft web site. Download and install the Critical Updates.

Reinstall ReDAQ Shape V2.11.
Reference ReDAQ Shape for MAQ20 User Manual Sections 1.3 Minimum Host Computer Requirements, 1.4 Installation, and 1.5 License Unlock Code.
Here you can exercise the second option from above. Since you have already installed the USB driver, in the USB Driver Installation dialog box, you can uncheck the Install USB Driver box.
How to re-calibrate 8B45 modules?
Dataforth signal conditioning modules were designed to have excellent stability; therefore, re-calibration is unnecessary. We recommend against user re-calibration of Dataforth modules, but if a company requires scheduled re-calibration, we do offer a re-calibration service. To obtain details, contact sales by email at sales@dataforth.com or by phone at 1 800 444 7644 press 1 for sales.
Could you explain, what is the main difference between the DSCA41 and the DSCA49?
The main difference is the DSCA41 is an input module and the DSCA49 is an output module, which means:

A. The DSCA41 module has its input on the isolated field side of the module, connected to it through screw terminals 6 and 7. The DSCA41 module has its output on the system and power supply side of the module, connected to it through screw terminals 3 and 4.

B. The DSCA49 module has its output on the isolated field side of the module, connected to it through screw terminals 6 and 7. The DSCA49 module has its input on the system and power supply side of the module, connected to it through terminals 3 and 4.

Keywords/Phrases: DSCA, DSCA module, DSCA input module, DSCA output module, DSCA41, DSCA49
What are the Modbus mapping details to use for PID control features like set point address, tuning parameter details, alarms, etc.?
This information is in MA1056, MAQ20 PID Controller User Manual. You may also need some of the Modbus mapping details for the MAQ20-COMx module found in MA1040, MAQ20 COMx Hardware User Manual. These manuals are in the Media Attachments box to the right of the topic main body.
Can I use the SCMVAS-Mxxx modules standalone?
SCMVAS-Mxxx modules are high voltage input non-isolated attenuator modules. If used standalone, the module could potentially allow high voltage through to expensive data acquisition equipment. Therefore SCMVAS-Mxxx modules must be used in conjunction with an SCMVAS backpanel and an SCM5B30-07x or SCM5B40-07x isolation and signal conditioning module with input over-voltage protection.

Keywords/Phrases: 5B, 5B module, SCMVAS, SCMVAS-Mxxx
For SCM7B22 modules when I give LabVIEW (or other DAQ software) an output command, I get no output from the backpanel, why?
That’s because the SCM7B22 and the SCM7B39 are output modules, are connected the reverse of input modules, they have their inputs on the system side (power supply side) of the backpanel. They provide their output on the isolated field side of the backpanel.

Keywords/Phrases: 7B, 7B module, 7B output module, 7B22, 7B39
How do I find SLX940 ReDAQ Shape Software?
The quickest way to find SLX940 ReDAQ Shape Software is on www.dataforth.com.
In the upper left of the home page, under Explore our product offerings: follow this path: Data Acquisition and Control --> MAQ20 Modular Data Acquisition System --> In the Related Topics box, click on MAQ20 User Manuals and Software Download Center --> in Application Software box top center of page, click on MAQ20-940 ReDAQ Shape for MAQ20 - Developer.
Or alternately.
In the upper left of the home page, under Explore our product offerings: follow this path: Data Acquisition and Control --> ReDAQ Shape Graphical Software (for MAQ20) --> ReDAQ Shape for MAQ20 Software box, the top center of the page, click on Download Center --> in Application Software box top center of page, click on MAQ20-940 ReDAQ Shape for MAQ20 - Developer.

Keywords/Phrases: SLX940, ReDAQ, ReDAQ Shape, MAQ20 Software
For 8B49 modules when I give LabVIEW (or other DAQ software) an output command, I get no output from the backpanel, why?
That’s because the 8B49 and the 8B39 are output modules, are connected the reverse of input modules, they have their inputs on the system side (power supply side) of the backpanel. They provide their output on the isolated field side of the backpanel.

Keywords/Phrases: 8B, 8B module, 8B output module, 8B49, 8B39
How much does the SCMXPRT-003 weigh?
It weighs 4.85 pounds (2.2kg, 2200g).

Keywords/Phrases: Power supply, power supplies, 5B, 5B accessories, SCMXPRT-003, weight, mass, load
Is an external conversion resistor required in order to use the DSCA32 module?
No, an external conversion resistor is not required in order to use the DSCA32 module. The current/voltage conversion is achieved by an internal resistor as shown in the block diagram in the data sheet.

An external conversion resistor in the case of the DSCA32 could be used to shunt off some of the current from the module and allow a larger input current range; then they could also be used with voltage input modules to convert a non-standard current range into an input voltage range.

Keywords/Phrases: DSCA32, internal resistor, external conversion resistor
What is the total power consumption of the 8B backpanel?
The total power requirement on the 5VDC power rail is the summation of the power requirement of the individual modules as specified in each module specification. For power budget purposes, multiply the total power requirement you calculated by 1.5 for maximum power needed.

KEYWORDS/PHRASES: 8B backpanel, power consumption, power requirement, total power, total power requirement
I have an SCM5B33 module, what is the total power consumption?
The max base power in all 5B33 modules is +5VDC x 140mA(max) = 700mW.

For Vout models, 5B33-01 to 5B33-07, add: 5V x 2mA = 10mW.
For Vout models, 5B33-01D to 5B33-07D, add: 10V x 2mA = 20mW.
For 0 to 1mA current loop output modules, 5B33-01B to 5B33-07B add 3mW.
For 0/4 to 20mA current loop output modules, 5B33-01C,E to 5B33-07C,E add 60mW.

The 5B33-06 has a 0.1? current shunt. Add 1A^2 x0.1? =100mW.
The 5B33-07 has a 0.025? current shunt. Add 5A^2 x0.025? = 625mW.

Keywords/Phrases: 5B33 power, 5B33 total power, 5B33 power consumption, 5B33 total power consumption, mW, watt, watts, milliwatts, heat, dissipation
Is there a drawing which can help me locate the SCM9B mounting holes?
There is a mechanical drawing of the SCM9B modules at the end of the 9B data sheets on www.dataforth.com. A .pdf of the drawing is also in the Media Attachments box to the right of the topic main body.
Can MAQ20-BRDG1 support a strain sensor such as a load cell, can it measure stress?
MAQ20-BRDG1 can measure any millivolt signal as long as it is within the limits specified for input voltage defined by sensitivity multiplied by excitation voltage and within the bandwidth. Where strain, load, weight, stress, etc. need to be measured, that is in part dependent on the sensor and how it converts those parameters into millivolts and in part on scaling in software.

Keywords/Phrases: MAQ20-BRDG1, strain, strain gage, strain gauge, load cell
Is there an extra charge for the extended frequency range to 20kHz for a DSCA33-01C?
There is no extra charge for the extended frequency range in the DSCA33. If you look in the DSCA33 Specifications under Accuracy, you will notice the extended frequency range carries an additional +/-0.75% of Reading error. This error is in addition to the +/-0.25% Span error at 50/60Hz. So the total accuracy error will be +/-0.25% + (+/-0.75%) = +/-1.00%.
We have a lot of 5B racks that I would like to use, but I am not sure how to purchase the 34 conductor ribbon cable that these older 5B racks use. Do you guys sell the connectors and cable that I would need for the 16 channel 5B rack
“ If you are inquiring about the ISO-RACK 16, Dataforth does not make that. Please look up www.mccdaq.com; they make the ISO-RACK 16 and accessories.

If you wish to purchase Dataforth backpanels and accessories, you can look up www.dataforth.com. The base model number for our 16 channel backpanel is SCMPB01 and our ribbon cables are 26 conductor and their base model number is SCMXCA004. I have included the web address of the .pdf of the backpanels and accessories data sheet in the following line.

www.dataforth.com/catalog/pdf/scm5baccs.pdf

Keywords / Phrases:

ISO-RACK16, 34-conductor ribbon cable, SCMPB01, 26-conductor ribbon cable
Can any Dataforth products be powered from a USB port?
Since some USB ports provide 5VDC power, it would make sense to use them to power some accessory devices.
Before you use a USB port to power a Dataforth device, use the following check list to verify the feasibility.

Sum all the typical 5VDC current requirements of the Dataforth devices you plan to use in your application. To find out the maximum power budget, multiply the total typical current requirements by 1.5 and compare this to the total current available from the USB port.

Since Dataforth 5VDC powered devices require a +/-5% tolerance, check that the voltage is not > 5.25VDC and not < 4.75VDC with the intended load connected.

Also check that the max ripple of the USB port with the full load connected is < 100mVp-p.


Keywords/Phrases: USB port max current available, USB port max power available, USB port max ripple
Why do I see a -10V shift when I change to a DSCL23 from a DSCA42-01C or similar?
The DSCA42-01C internal electronics is powered by an overall power supply and then the module output circuitry provides the output current whose return side (or negative side) is connected internally to the power supply common. This causes the output signal to be positive with respect to the common.

Whereas, the DSCL23 is loop-powered through its output terminals. That puts the 4-20mA receiver (the load) in series with the power supply. So when you measure the voltage from the power supply common (- terminal) to the other side of the load you will see a negative signal. The module could be made usable if the power supply has a fully floating output and you can make terminal 1 (the return current terminal) the common and measure the positive signal across the load from the power supply (-) to terminal 1 (the return current terminal), the common.

A better match for your application is the DSCA42-01C. Its internal electronics is powered by an overall power supply and then the module output circuitry provides the output current whose return side (or negative side) can be connected to the power supply common. This causes the output signal to be positive with respect to the common.

Keywords/Phrases: 4-20mA isolator with loop power, 2-wire transmitter interface signal conditioner with loop power
SCM7B – why are there many bipolar input models, but a lot fewer bipolar output models offered?
The SCM7B series is defined for the process industry which has a preference for unipolar signals on the system / power supply side of the module. In fact , there is a preference for a positive offset above a zero current or voltage output, such as, 4-20mA rather than 0-20mA, 1-5V rather than 0-5V, and 2-10V rather than 0-10V.

Keywords/Phrases: SCM7B bipolar input / bipolar output, SCM7B bipolar output, bipolar output
Can LDM and DCP devices send-receive Modbus communications?
LDM and DCP devices are electrical interface converter and line driver devices which convert RS-232 signals to current loop or differential voltage signals to go the distance and reconvert them at the far end to RS-232 signals.

LDM and DCP devices are transparent to the data rate, that is, they can operate on any standard or non-standard data rate from zero up to their max specified data rate without having to set a particular data rate. Data rate from zero? That’s right data rate from zero, meaning that the devices are static comm devices. As long as the input signal holds a voltage level corresponding to a 0 or 1 logic level, the output signal will hold that same logic level.

They do nothing more to the data than transfer it from their Dsub connectors to their output field-side terminals and from their input field-side terminals to their Dsub connector. They do not care about data formatting or timing gaps; they just pass through and retransmit the logic levels present on their inputs.

Keywords/Phrases: LDM, DCP, Modbus, line driver, converter
Can you explain what is the difference between the “Standard frequency range” and the “Extended frequency range” for the SCM5B33 module?
The user does not have to do anything special; the module operates seamlessly over the full frequency range of 45Hz to 20kHz. We needed to split the full frequency range into two ranges so we could define and specify the different accuracy levels associated with each subrange.
If you look further down the 5B33 Specifications under Accuracy, you will notice the Standard frequency range from 45Hz to 1kHz carries an additional +/-0.25% Reading error. This error is in addition to the +/-0.25% Span error at 50/60Hz. So the total accuracy error will be +/-0.25% Span + (+/-0.25% Reading) = +/-0.50%.
And the Extended frequency range from 1kHz to 20kHz carries an additional +/-0.75% Reading error. This error is in addition to the +/-0.25% Span error at 50/60Hz. So the total accuracy error will be +/-0.25% Span + (+/-0.75% Reading) = +/-1.00%.

Keywords/Phrases: 5B RMS, 5B True RMS, 5B RMS input module, 5B True RMS input module, 5B33
How do I mount and remove a DIN rail module?
To mount the module, do the following.
With the DIN rail mounted horizontally on a vertical panel, hang the hook at the top rear of the module over the top edge of the DIN rail.
Then rotate the module down so the bottom rear corner of the module touches the bottom edge of the DIN rail.
Then push on the bottom front corner of the module until you hear and feel a click. Push and pull the front of the module to ensure it is securely held on the DIN rail.

To remove the module, do the following.
Using a small screwdriver, insert it into the slot on the movable clip (red for DSCA & DSCT) under the bottom rear corner of the module.
Rotate the body of the screwdriver toward the body of the module until the movable clip disengages the bottom edge of the DIN rail and you can rotate the module upward.
Then you can unhook the module from the top edge of the DIN rail.

Keywords/Phrases: DSCA, DSCT, DIN rail module, mounting, removing
I looked into the SCMVAS-Mxxx modules, but are they truly DC Voltage Attenuators?
SCMVAS-Mxxx modules are actually DC attenuators because they are specified using + and – voltage limits. These are DC voltage levels or peak AC voltages. If they were meant to be AC voltage attenuators, they would be specified in Vrms.

Keywords/Phrases: 5B, 5B module, SCMVAS, SCMVAS-Mxxx, attenuation, high voltage
In the SCMD-MIDC5 manual, the maximum output voltage is 30V; if +Vcc is only 5V, how could output voltage be 30V and logic voltage 6V?
Nominal Logic Voltage (Vcc) is the module power supply voltage and is +5V. Maximum Logic Voltage is +6V. The output voltage is from an external power supply and there fore can be higher than the module Logic Voltage and is specified at a maximum of 30V.

Keywords/Phrases: SCMD, MIDC, MIDC5, SCMD-MIDC, SCMD-MIDC5
Do the SCM9B-A1000 & SCM9B-A2000 have DIN rail mounting?
Neither the SCM9B-A1000 nor the SCM9B-A2000 has DIN rail mounting.
The SCM9B-D192, a DIN rail mountable module, is the closest equivalent of the SCM9B-A2000.

Keywords/Phrases: SCM9B DIN rail mounting, SCM9B DIN rail module
What is the max operating output current for SCM5B input modules?
The max operating output current, which still allows the output voltage to remain within accuracy specs, for SCM5B input modules is +/-2mA.
The above limit allows a 5V output range module a >= 2.5k Ohm load.
The above limit allows a 10V output range module a >= 5k Ohm load.
The output current limit for SCM5B input modules is 8mA. At this current level the output load is 0 Ohm or a shorted output.

Keywords/Phrases: SCM5B output current, SCM5B input modules, max operating output current, output current
On 5B backpanels, what is the threaded bolt connected to?
On the SCMPB01, SCMPB02, SCMPB05, and SCMPB06 backpanels the threaded bolt is directly connected to I/O COM and to an array of jumpers which enable a variety of grounding configurations. In the Attachments box to the right of this Content box, open or download the SCMPB01 or SCMPB02 data sheet. For a thorough discussion of grounding configurations, refer to the Grounding section.
What is the ECCN classification of Dataforth products?
Since no Dataforth products are Dual Use, they are classified EAR99, no license required.

Keywords/Phrases: Dual Use, ECCN, EAR99
Does Dataforth have an isolator with one input featuring two or more outputs?
No, but this function can be implemented with a two or three channel loop isolator, such as DSCL22-11, DSCL22-21, DSCL24-11, or DSLC24-12. Connect all inputs in series with each other. Sum together all input burden voltages so as not to exceed the maximum loop voltage available.

Keywords/Phrases: DSCL, DSCL one input multi-output loop isolator, one input multi-output loop isolator
With RS-485 communicating to SLX200 I get timeout errors.
You must put the SLX200 into a known communications state. To do this, with the SLX200 powered, pull the CRST jumper off both pins then re-install the jumper over both pins. To locate the CRST jumper, open or download the SLX200 H/W User Manual from the Media Attachments box to the right of this Content box and refer to Section 6.3.
Then power cycle the SLX200. This resets the communications interface to Factory Default conditions.
Communications Interface: RS-232
Device ID: 31
Data Rate: 19.2kbps
Parity: Even
Plug an RS-232 cable into the RS-232 RJ-45 port on the SLX200. Using the SLX200 Configuration Software, in the top tool bar, click on Configure, then click on Modbus RTU Interface. In the RS-232 text window, click on the down triangle and click on the desired RS-485 2-wire or RS-485 4-wire. Click on the Configure button.
Disconnect the RS-232 cable. Power cycle the SLX200. Plug the RS-485 cable into the RS-485 RJ-45 port on the SLX200. Start sending Modbus functions to the SLX200.
On the 8B51, can I apply the + and – input leads “backwards” to reverse the polarity of the output signal?
This can be done only if the voltage source is floating (isolated); this pertains also to the SCM7B modules.
Better modules for true differential operation for which a floating source is not needed are the DSCA30/31/40/41. Other modules for this type of operation are the SCM5B30/31/40/41 used with an SCMPB07-x with the I/O COM jumpers Jn removed in the channels for which true differential operation is desired. Both the DSCA and the SCM5B outputs can float +/-50V with respect to power supply common.

Keywords/Phrases: 8B51, reverse input leads, true differential
For SCM5B39 modules when I give LabVIEW (or other DAQ software) an output command, I get no output from the backpanel, why?
That’s because the SCM5B39 and the SCM5B49 are output modules, are connected the reverse of input modules, they have their inputs on the system side (power supply side) of the backpanel. They provide their output on the isolated field side of the backpanel.

Keywords/Phrases: 5B, 5B module, 5B output module, 5B39, 5B49
I’m having trouble getting the DCP35 to communicate with a datalogger.
I’m having trouble getting the DCP35 to communicate with a datalogger. To connect to the DCP35, open or download the DCP35 data sheet from the Media Attachments box to the right of this Content box or the DCP35 User Manual from the Media Attachments box to the right of this Content box.
The important aspect of the DCP35 is providing it with sufficient power for it to send data over usable distances at a reasonable data rate.
That said, pay special attention to the power specifications in the data sheet and to the “Power Requirements” and “Cable Capacitance Effects On Distances” sections of the user manual.

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What are feasible failure modes of the SCM5B36 and SCM5B41 devices?
The failures of the Voltage Regulator, Transformers, Oscillator, Analog Switch and the Power Supply Capacitors would cause the module output to go to 0V and the supply current will be 0mA. This failure mode may be accompanied by module supply current many times higher than published specification. These are the common failure modes. Other failure mode may result in output pegging to the output supply rail at 7.5V.

The Inputs are passive nodes and the input failures can cause the module output to go to 0V for both SCM5B41 and SCM5B36 series. The input failures of SCM5B36 may also peg the output to the negative supply rail of -7.5V.

The MTBF (Mean Time Before Failure) for SCM5B36 series is 675,000 hours and the same for SCM5B41 series is 680,000 hours. This failure rate calculation is derived from the MIL-HDBK-217 (Reliability Prediction of Electronic Equipment). The "Part Stress Analysis" method is used at a ground benign environment, +30°C temperature, and quality level B-2 to D-1 depending on the component. The specified humidity level is 95% RH noncondensing.

Keywords/Phrases: SCM5B failure modes, SCM5B36 failure modes, SCM5B41 failure modes
Are these iso amps used in the same way as op amps when amplifying signals (G = 1 + R2/R1)?
These iso amps do not require external resistors as those are built in. Each model has a fixed gain as determined by the output voltage range divided by the input voltage range.
One caution: the input models such as the SCM5B40 series are limited to +/-2mA output current in order to remain within their accuracy spec.

Keywords/Phrases: Isolation amplifiers, isolation amps, iso amps, input modules, op amps
What is the total power consumption of the 7B backpanel?
The total power requirement on the DC power rail is the summation of the power requirement of the individual modules as specified in each module specification. For power budget purposes, multiply the total power requirement you calculated by 1.5 for maximum power needed.

Keywords/Phrases: 7B backpanel, power consumption, power requirement, total power, total power requirement
How do I register / unregister modules in a MAQ20 system?
The media attachment "MAQ20ModuleRegistrationStrategies.pdf" in the "Media Attachments" box to the right is an excerpt from the MAQ20 Communications Module HW User Manual.pdf.

This attachment describes in three sections the standard and alternate setup processes involved in Building a System, Section 7.0, Maintaining a System, Section 8.0, and Expanding a System, Section 9.0.

In addition, MAQ20 I/O Module Registration, Section 10.0, provides a functional description of the automated registration process and information about tools enabling user reassignment of Registration Numbers. Calculated examples of: a write to the Module Detect Register at I/O module address 98 plus the module offset based on Registration Number will trigger a module to visually self-identify by blinking the STAT LED and how to calculate the base address for reading 16 channels of Current Data for a MAQ20-VSN module.
I have an SCM5B33 module, what is the accuracy error between 0-10% span?
In Note 4, For 0-10% Span measurements add 0.25% accuracy error (-02 through -07) or 1.00% accuracy error (-01). Accuracy error includes linearity, hysteresis and repeatability but not source or external shunt inaccuracy (if used).

Keywords/Phrases: 5B RMS, 5B True RMS, 5B RMS input module, 5B True RMS input module, 5B33 accuracy
What is the output resistance, how does the filtering work and what are the overshoot characteristics for a 8B51-03?
The 8B51-03 has an output resistance < 1 Ohm.
Its filter is a five-pole low pass filter which attenuates gradually up to the -3dB frequency of 20kHz above which it attenuates sharply at 100dB per decade of frequency. The filter has no overshoot because it is critically damped.
Is there an 8B module which can accept up to +/-50V, has >10k input resistance, <100 Ohm output resistance and can be sampled up to 250kHz?
The 8B51-12 can accept up to +/-60V input.
It has >500k Ohms input and <1 Ohm output resistance.
It could be sampled at 250kHz, but it will present unchanging data within +/-0.08% up to 92% of the samples. For it to provide new data it can be sampled up to a 20kHz sample rate.
Do SCM7BP02 and SCM7BP04 have CJC sensors installed by default?
All SCM7B backpanels, including SCM7BP02 and SCM7BP04 have CJC sensors installed by default in every field input terminal in every channel. There is no separate model number for including CJC sensors as in SCM5B and 8B backpanels.

KEYWORDS/PHRASES: SCM7B backpanels, CJC sensors
Is an external conversion resistor required in order to use the DSCT32 module?
No, an external conversion resistor is not required in order to use the DSCT32 module. The current/voltage conversion is achieved by an internal resistor as shown in the block diagram in the data sheet.

An external conversion resistor in the case of the DSCT32 could be used to shunt off some of the current from the module and allow a larger input current range; then they could also be used with voltage input modules to convert a non-standard current range into an input voltage range.

Keywords/Phrases: DSCT32, internal resistor, external conversion resistor
The SCM5B42 can function as an SCM5B32, why can't the 8B42 function as an 8B32?”
The 5B42 has separate passive input connections on +In and -In and the 8B42 does not. If you notice, the - input (pin 3) on the 8B42 has NC (No Connection) to the internal circuits of the module.
The 8BB42 can only be used with passive 2-wire transmitters because the only connection into the module is through the +EXC (excitation power out) and the + (return signal current input) connection.
In the 8B product line, the customer will have to use the 8B32-01 passive current input module.

Keywords/Phrases: 5B, 5B42, 8B, 8B42, 8B32-01, passive 2-wire transmitters, passive current input
Can terminals 6 & 8 on DSCP62 be connected together without damaging the unit?
Yes. However, keep in mind, when those terminals are not connected together, the module offers up to 1500Vrms isolation of the output section from the power section.
When those terminals are connected together, that isolation is cancelled, so the input of the device the module output is driving can no longer float.

Module still retains 1500Vrms withstand capability to the T/C or other type of input when pin 6 and 8 are tied together.


ATEX conformity: Is it possible to use the DSCA38-12C in zone IIC (hydrogen)?
The DSCA38-12C conforms to EN60079-15 2005.

For use in:
ATEX 94/9/EC
Group II
Category 3 (Zone 2)
Is PT3E an industrial or a commercial product?
PT3E is a commercial product, temperature range 0-70°C.

Further the power cable to the transformer has a molded plug with 2 pins. Generally it should have 3 pins, the third pin being earth ground for an industrial power cord. Why is it not so?

Once again, the PT3E is commercial product meant to be compatible with many regions of the world. The users in a region with significantly different outlet configuration generally buy their own adapter.


Keywords/Phrases: LDM, PT3E
What are the dimensions of the SCM9B series of modules?
The module dimensions of the SCM9B Series can be found on a drawing in www.dataforth,com. In the upper left of the home page under Explore our product offerings, point and click on Signal Conditioning, point and click on 9B Analog to Serial Isolated Modules. In the center column of the next page under SCM9B Series Product Family, click on the Adobe Acrobat symbol to the right of Dimensions. This displays a .pdf drawing of SCM9B module dimensions. The drawing maybe downloaded and saved.

A .pdf of the drawing is also in the Media Attachments box to the right of this topic's main body.

Keywords/Phrases: SCM9B, SCM9B mounting holes, SCM9B mechanical drawing, SCM9B dimensions drawing 9B dimensions drawing
Does Dataforth offer SCM5B48 modules with customized fixed-parameters?
Please send Dataforth the selections for the four configurable parameters of the SCM5B48.
Below are the parameters in the order they appear left to right in the data sheet, Figure 2: SCM5B48 Side Label.

High Pass Filter, S5: DC, 0.2Hz, 10Hz
Gain, S4: 1, 10, 100
Excitation, S1: 4mA, 9mA
Low Pass Filter, S3, S2: 2.5kHz, 5kHz, 10kHz, 20kHz

Dataforth will assign custom module number, generate a data sheet, and send it for review and signoff.

Keywords/Phrases: SCM5B48 fixed-parameter, SCM5B48 preset-parameter, fixed-parameter, preset-parameter
Do I need a PC connected to Record to MAQ20 SD Card?
It is true you do not need to have a PC connected to record the data to the SD card.
However, you will need the PC connected in order to set up what to record and how much and to start recording, refer to the MAQ20-COM2/-COM4 Hardware User Manual, Section 13.0 SD Card Operation, pages 17 through 19 of 40.
Once the recording has started, you can disconnect the PC in software from the MAQ20 system and then disconnect the communication cable physically.
Recording the data; then you will need the PC connected once again to stop recording which also closes the data file.

There is an alternate method: remote operation and remote retrieval of data through a built-in FTP Server.
Refer to MAQ20-COM2/-COM4 Hardware User Manual, Section 16.0 Remote Operation via Direct Internet Connection, pages 25 through 26 of 40.
Refer to MAQ20-COM2/-COM4 Hardware User Manual, Section 14.0 Retrieving Data from the SD Card – Manual or FTP Server, pages 20 through 25 of 40.

The above sections of the manual are in the Media Attachments box to the right of this topic’s main body.
I need mV in V in modules with Bw>20kHz.
Dataforth input module bandwidth design platform does not support bandwidths > 20kHz.

Keywords/Phrases: mV in V in modules Bw>20kHz
What is the max sample rate for MAQ20 modules?
The best place to find information about this is in the MAQ20 COMx Hardware User Manual, Section 21.0 Throughput, pages 34 through 37 of 40.
Is MAQ20-940, ReDAQ Shape, an electronic download only or is it also on DVD, flash drive?
MAQ20-940, ReDAQ Shape, is an electronic only product for download from www.dataforth.com.

Keywords/Phrases: MAQ20–940, ReDAQ Shape
8B backpanels: Are these products ESD sensitive? And if so, should the product be in sealed static shielding bags, and not an “Antistatic” bubble wrap, when shipped?
Static shielding bags are not necessary since the 8B backpanels are not ESD sensitive. The risk of physical damage is greater than the risk of ESD damage.

Keywords/Phrases: 8B backpanel, 8B backpanel ESD sensitivity, ESD, ESD sensitivity