Each SCM5B47 thermocouple input module provides a single channel of thermocouple input which is filtered, isolated, amplified, linearized and converted to a high-level analog voltage output. This voltage output is logic-switch controlled, allowing these modules to share a common analog bus without the requirement of external multiplexers.

The SCM5B modules are designed with a completely isolated computer side circuit which can be floated to ±50V from Power Common, pin 16. This complete isolation means that no connection is required between I/O Common and Power Common for proper operation of the output switch. If desired, the output switch can be turned on continuously by simply connecting pin 22, the Read-Enable pin, to I/O Common, pin 19.

The SCM5B47 can interface to eight industry standard thermocouple types: J, K, T, E, R, S, N, and B. Its corresponding output signal operates over a 0V to +5V range. Each module is cold-junction compensated to correct for parasitic thermocouples formed by the thermocouple wire and screw terminals on the mounting backpanel. Upscale open thermocouple detect is provided by an internal pull-up resistor. Downscale indication can be implemented by installing an external 47 MOhm resistor, ±20% tolerance, between screw terminals 1 and 3 on the SCMPB01/02/03/04/05/06/07 backpanels.

Signal filtering is accomplished with a six-pole filter which provides 95dB of normal-mode rejection at 60Hz and 90dB at 50Hz. Two poles of this filter are on the field side of the isolation barrier, and the other four are on the computer side.

After the initial field-side filtering, the input signal is chopped by a proprietary chopper circuit. Isolation is provided by transformer coupling, again using a proprietary technique to suppress transmission of common mode spikes or surges. The module is powered from +5VDC, ±5%.

A special input circuit on the SCM5B47 modules provides protection against accidental connection of power-line voltages up to 240VAC.
  • Interfaces to Types J, K, T, E, R, S, N and B Thermocouples
  • Linearizes Thermocouple Signal
  • High-Level Voltage Outputs 1500Vrms Transformer Isolation
  • ANSI/IEEE C37.90.1 Transient Protection
  • Input Protected to 240VAC Continuous
  • 160dB CMR
  • 95dB NMR at 60Hz, 90dB at 50Hz
  • ±1µV/°C Drift
  • CSA Certified, FM Approved, CE and ATEX Compliant
  • Mix and Match SCM5B Types on Backpanel
Linearized Thermocouple Input Modules

SCM5B47 Devices


Part Number Thermocouple TypeOutput RangeInput Temperature RangeMechanical FormatIsolation VoltageIsolation TypeAccuracy
B 0 to +5 V 500 to 1800 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.15% (±2.0°C)
B 0 to +10 V 500 to 1800 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.15% (±2.0°C)
E 0 to +5 V 0 to 1000 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.10% (±1.0°C)
E 0 to +10 V 0 to 1000 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.10% (±1.0°C)
J 0 to +5 V 0 to 760 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±0.61°C)
J 0 to +10 V 0 to 760 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±0.61°C)
J 0 to +5 V -100 to 300 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±0.32°C)
J 0 to +10 V -100 to 300 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±0.32°C)
J 0 to +5 V 0 to 500 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.07% (±0.36°C)
J 0 to +10 V 0 to 500 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.07% (±0.36°C)
J 0 to +5 V -100 to 760 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±0.70°C)
J 0 to +10 V -100 to 760 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±0.70°C)
K 0 to +5 V 0 to 1000 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±0.80°C)
K 0 to +10 V 0 to 1000 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±0.80°C)
K 0 to +5 V 0 to 500 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±0.38°C)
K 0 to +10 V 0 to 500 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±0.38°C)
K 0 to +5 V -100 to 1350 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±1.20°C)
K 0 to +10 V -100 to 1350 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±1.20°C)
K 0 to +5 V 0 to 1200 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±0.96°C)
K 0 to +10 V 0 to 1200 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±0.96°C)
N 0 to +5 V -100 to 1300 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±1.15°C)
N 0 to +10 V -100 to 1300 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.08% (±1.15°C)
R 0 to +5 V 500 to 1750 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.10% (±1.3°C)
R 0 to +10 V 500 to 1750 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.10% (±1.3°C)
S 0 to +5 V 500 to 1750 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.10% (±1.3°C)
S 0 to +10 V 500 to 1750 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.10% (±1.3°C)
T 0 to +5 V -100 to 400 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.16% (±0.80°C)
T 0 to +10 V -100 to 400 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.16% (±0.80°C)
T 0 to +5 V 0 to 200 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.13% (±0.25°C)
T 0 to +10 V 0 to 200 °C Modular plug-in-board 1500 Vrms Transformer 3-way ±0.13% (±0.25°C)

Frequently Asked Questions


Can Dataforth provide calibration reports for modules I purchased?
Yes we can provide calibration reports for the modules that you purchased.

You can either
a) visit https://www.dataforth.com/TestDataReport.aspx to search for Test Report Datasheets by Serial Number or
b) you can send us a list of model numbers and their serial numbers to support@dataforth.com

Analog Devices announced a last time buy and discontinuance of their signal conditioning modules. Can I replace them with Dataforth signal conditioning modules?
Yes, in general, Dataforth signal conditioning modules are a direct replacement for all Analog Devices signal conditioning modules. e.g. "SCM5B35-xx: Linearized 4-Wire RTD Input Modules" will replace Analog Devices "5B35: Isolated 4 Wire RTD Input Signal Conditioning Module".

Please note that Dataforth signal conditioning modules are RoHS II compliant.

What is the recommended power supply for Dataforth SCM5B and 8B modules?
The recommended power supply for the Dataforth SCM5B and 8B modules are the linear power supplies in our SCMXPRT/SCMXPRE series. The SCMXPRT/SCMXPRE power supplies output 5V and have options for 1A output current (SCMXPRT-001) or 3A output current (SCMXPRT-003).

The SCMXPRE series is identical to its SCMXPRT counterpart, but is configured for European voltage standards.

The SCMXPRT-001/SCMXPRE-001 both have the option for DIN rail mounting as well (SCMXPRT-001D/SCMXPRE-001D).

Other power supplies that meet that power requirements of the SCM5B and 8B modules can be used as well, but it is strongly recommended to use a linear power supply rather than a switch-mode power supply. Switching power supplies can add noise artifacts to the output of your modules.

If I purchase a backplane with no CJC, will I still be able to use modules that require the CJC enable jumper to be installed?
Yes. Backplanes with no CJC will still come with the CJC enable installed on the backplane.

How do I convert an RMS voltage to its corresponding peak voltage?
To convert an RMS voltage to its corresponding peak voltage, you simply take the RMS voltage value and multiply it by the square root of 2, or roughly 1.414.

For example, 1500Vrms corresponds to a peak voltage of 1500 * 1.414 = 2121 Vp

Will the isolation on the SCM5B modules support a discharge of 1500VDC without damaging anything connected to the output?
Yes, the SCM5B modules are isolated up to 1500 Vrms, which means that if the common mode voltage between the field side and system side is limited to 1500Vrms, the device will be protected.

However, the input protection for SCM5B modules (i.e., the voltage across the +IN and -IN input terminals) is 240Vrms max.

Do you have any SCM5B modules with a 50kHz bandwidth?
None of our standard SCM5B modules have a 50kHz bandwidth. However, it is possible to order a custom SCM5B module with 50kHz bandwidth. Keep in mind that new customs require a 10 pc minimum order and are subject to extra design fees.

Do you have an MTBF figure for the SCM5B39? What are the main failure modes?
The failure rate calculations for our SCM5B modules can be found in our application note AN503: https://www.dataforth.com/catalog/pdf/an503.pdf

There are no dominant failure modes.

Is the calibration of Dataforth modules traceable to NIST standards?
Yes, calibration of Dataforth modules is traceable to NIST standards.

On the SCM5B modules, what is the purpose of pin 18 (Vin), why is it tied to pin 20 (Vout)? Doesn't Vout provide the output by itself?
Vout is used with input modules, which are all the SCM5B models except for the SCM5B39 and SCM5B49. Vin is used for output modules, SCM5B39 and SCM5B49.

The reason for doing this is because input modules acquire a signal from the field side, and then output a corresponding signal to the system side. On the contrary, output modules acquire a signal from the system side, and then output a corresponding signal to the field side. Since SCM5B backplanes are designed for all channels to accommodate either an input or an output module, the terminal/pin that you would normally get your output signal from if you were using an input module is the same terminal/pin that you would be feeding your input signal to if you were using an output module.

I just received an SCMPB01 back panel. How should I configure jumpers J1 through J4 for my application?
The factory configuration for jumpers J1 through J4 is the optimal configuration for most applications. If for some reason this jumper configuration will not work/is not working in your application, see our application note AN502 "Ground Connections and Host System Interfaces" for other valid jumper configurations and what situations you would use them.

What is the required resistance for jumpers J1 through J4 on my SCM5B backpanel?
J1-J4 on the SCM5B backpanels are jumper cables, so they should have 0 ohm resistance.

If a thermocouple is soldered to a lead that has current running through it, how do you avoid affecting the thermocouple signal and subsequent measurement?
The thermocouples must be isolated so current does not come from the circuit under test and run through them. SCM5B, SCM7B, 8B, DSCA, DSCT, MAQ20 all offer the required isolation.

Is the SCM5B40-06 sensitive to being soldered into a board? Would soldering it damage the part?
We do not recommend soldering the SCM5B pins to a board as it could potentially damage the module. Soldering the pins would also void the warranty.

Many sockets are available which accept the mounting pins. TE Connectivity / AMP part number 50865-5 is an example of these sockets and any equivalent part will work as well.

Is there a quick way to check if my SCM5B47x-xx module is operational?
With the SCM5B47x-xx connected to a proper backplane with CJC, with power being supplied, you can short the input terminals of the device to force a room temperature reading. Then you can check the output of the module and see if the output is what you're expecting. To determine what the proper output of a module is at room temperature, you'll need to look at the specific input and output range of the module you are using.

Can I use the SCMXBEFE and SCMXSE accessories to make my SCMPB01/2 DIN rail mountable?
No, converting any of the 16 channel SCM5B backplanes to something DIN rail mountable is a much more involved process than the SCMPB03/04. If you would like a 16 channel SCM5B backplane that can mount on a DIN rail you must purchase an SCMPB01-2, SCMPB01-3, SCMPB02-2 or SCMPB02-3.

Should I ground my sensor wire shield to the 10-32 ground post on the SCMPB01?
It is not recommended to ground the sensor wire shield to the 10-32 ground post on the SCMPB01 because that is the system side ground, while the sensor wire is on the field side. The sensor wire shield should be grounded to the field side ground, which varies based on the signal conditioner you are using. Please see the "Shield Grounding" application note for more information.

Whats the difference between SCM5B37 modules and SCM5B47 modules?
SCM5B47 module output is linearized with respect to the input temperature. SCM5B37 modules require a special calculation to determine the input temperature from a given output voltage. Please see our application note for more information on this: https://www.dataforth.com/thermocouple-voltage-to-temperature-conversion-method.aspx

Do I need to purchase the SCMXCJC with my SCMPB03?
No, the SCMPB03 comes with the CJC built into the backpanel.

Can I use an SCM5B module with my OM5-BP-SKT-C?
Yes, any of our SCM5B modules are able to be mounted and operated on Omega's OM5-BP-SKT-C board.

How does the load resistance of a module affect the noise at the output?
Noise at the output of a module is independent of load resistance.

If the input range of my signal conditioner is -1V to +1V and the output range is 0 to 10V, does this mean that it ignores polarity?
A signal conditioner with these I/O ranges does not mean that the module ignores the polarity of your voltage input. The output of voltage input modules are scaled linearly, meaning an input of -1V would correspond to an output of 0V, an input of 0V would correspond to an output of 5V, an input of +1V would correspond to an output of 10V, and so on.

Is the SCMXPRT-003 DIN rail mountable?
The SCMXPRT-001 has an option for DIN rail mounting (part number: SCMXPRT-001D) but the SCMXPRT-003 does not. Instead, it can be mounted on the SCMXRK-002 which is a 19 inch metal rack for mounting the SCMXPRT-003 as well as various Dataforth backpanels and the SCMXIF interface board.

Do SCM5B modules with outputs scaled up to 10V have separate power requirements from their 5V counterparts?
No, all SCM5B modules have the same power requirements (5VDC) regardless of their I/O specifications. The power supply current draw of different products in the SCM5B line may vary.

Where can I find the MTBF of my module?
Information on MTBF for SCM5B, SCM7B, 8B and DSCA is available on our website. Please see application note AN802 for more details. Application notes can be found under the "Literature" tab on the top navigation bar.
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Model NumberInput RangeOutput RangeBandwidthSensor TypeStatus*Comments
SCM5B47B-1081
+50C TO +1300C0V TO +5V4HZTYPE B THERMOCOUPLEPR2-segment accuracy spec
SCM5B47B-1215
0C TO 1750C0V TO +5V4HZTYPE B THERMOCOUPLEPR2-segment accuracy spec
SCM5B47B-1441
0C TO 1750C0V TO +5V4HZTYPE B THERMOCOUPLEPR2-segment accuracy, -IN shorted to +EXC
SCM5B47C-1588
+500C TO +1750C0 TO +5V4HZTYPE C THERMOCOUPLEPR 
SCM5B47E-1051
0C TO +170C0V TO +5V4HZTYPE E THERMOCOUPLEPR0.24C Accurate
SCM5B47E-1052
0C TO +275C0V TO +5V4HZTYPE E THERMOCOUPLEPR0.28C Accurate
SCM5B47E-1067
0C TO +125C0V TO +5V4HZTYPE E THERMOCOUPLEQU 
SCM5B47E-1165
0C TO +600C0V TO +5V4HZTYPE E THERMOCOUPLEPR0.6C Accurate
SCM5B47E-1490
0F TO +1400F0V TO +5V4HZTYPE E THERMOCOUPLEPROpen input response +5.8V
SCM5B47E-1596
0C TO +200C0V TO +5V4HZTYPE E THERMOCOUPLEPR0.2C Accurate, Open Input to +5.8V
SCM5B47E-1824
-40F TO +400F0V TO +5V4HZTYPE E THERMOCOUPLEPROpen Input to +5.8V
SCM5B47E-C014
0C TO +900C0V TO +5V4HZTYPE E THERMOCOUPLEQU 
SCM5B47J-1061
-100C TO +400C+1V TO +5V4HZTYPE J THERMOCOUPLEPR 
SCM5B47J-1412
0C TO +300C0V TO +5V1kHzTYPE J THERMOCOUPLEQU 
SCM5B47J-1463
0C TO +200C0V TO +5V4HZTYPE J THERMOCOUPLEPR 
SCM5B47J-1712
0C TO 500C0V TO +5V200HZTYPE J THERMOCOUPLEPR 
SCM5B47J-C012
-100C TO +760C0V TO +5V4HZTYPE J THERMOCOUPLEQU 
SCM5B47K-1014
0C TO +100C0V TO +5V4HZTYPE K THERMOCOUPLEPR0.1C Accurate
SCM5B47K-1015
0C TO +1200C0V TO +5V4HZTYPE K THERMOCOUPLEPR1.0C Accurate
SCM5B47K-1035
77K TO 300K0V TO +5V4HZTYPE K THERMOCOUPLEQU 
SCM5B47K-1044
-50C TO +200C0V TO +5V4HZTYPE K THERMOCOUPLEPR0.38C Accurate
SCM5B47K-1046
-100C TO +120C0V TO +5V 4HZTYPE K THERMOCOUPLEQU0.38C Accurate
SCM5B47K-1047
-100C TO +150C0V TO +5V4HZTYPE K THERMOCOUPLEPR0.38 C Accurate
SCM5B47K-1048
-50C TO +1200C0V TO +5V4HZTYPE K THERMOCOUPLEPR1.0 C Accurate
SCM5B47K-1049
-40F TO +1040F0V TO +5V4HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1060
0C TO +500C+1V TO +5V4HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1073
0C TO +1250C0V TO +5V4HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1123
-100C TO +400C0V TO +5V4HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1124
0 TO +150C0V TO +5V4HZTYPE K THERMOCOUPLEPR0.23C Accurate
SCM5B47K-1125
0 TO +50C0V TO +5V4HZTYPE K THERMOCOUPLEPR0.075C Accurate
SCM5B47K-1133
0 TO +1000C0V TO +5V4HZTYPE K THERMOCOUPLEPRNo Open TC Detect
SCM5B47K-1138
-40C TO +300C0V TO +5V4HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1152
0C TO +1000C0V TO +5V100HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1173
+1300F TO +1800F0V TO +5V4HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1183
-50C TO +200C0V TO +10V4HZTYPE K THERMOCOUPLEQU0.38C Accurate, see -1044
SCM5B47K-1190
-25C TO +100C0V TO +2.5V4HZTYPE K THERMOCOUPLEQU 
SCM5B47K-1191
0C TO +1370C0V TO +5V100HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1203
-100C TO +200C0V TO +5V4HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1234
-25C TO +550C0V TO +5V200HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1239
-50C TO +950C0V TO +10V4HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1291
-50C TO +250C0 TO +5V4HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1294
0 to +200C0 TO +5V4HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1332
-50C TO +100C0V TO +5V4HZTYPE K THERMOCOUPLEQU 
SCM5B47K-1435
-300F TO +100F0V TO +5V4HzTYPE K THERMOCOUPLEPR 
SCM5B47K-1436
-300F TO +200F0V TO +5V4HzTYPE K THERMOCOUPLEPR 
SCM5B47K-1442
0C TO 1250C0V TO +5V4HzTYPE K THERMOCOUPLEPR-IN shorted to +EXC
SCM5B47K-1444
-300F TO +500F0V TO 5V4HzTYPE K THERMOCOUPLEPR 
SCM5B47K-1639
0C TO +700C0V TO +5V30HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1759
-200C TO +50C0V TO +5V4HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1781
0C TO +400C0V TO +10V4HZTYPE K THERMOCOUPLEPRAccuracy = 0.12% span max.
SCM5B47K-1782
0C TO +1260C0V TO +10V4HZTYPE K THERMOCOUPLEPRAccuracy = 0.20% span max.
SCM5B47K-1809
-100C TO +300C0V TO +5V100HZTYPE K THERMOCOUPLEPR 
SCM5B47K-1820
0C TO +500C0V TO +5V4HZTYPE K THERMOCOUPLEPRPrecision CJC, Acc = 0.12% span max
SCM5B47K-1838
0C TO +1000C0V TO +5V200HZTYPE K THERMOCOUPLEPR 
SCM5B47K-C013
-100C TO +1350C0V TO +5V4HZTYPE K THERMOCOUPLEQU 
SCM5B47K-C018
 0V TO +5V300HZTYPE K THERMOCOUPLEQU 
SCM5B47K-C019
-100C TO +300C0V TO +5V4HZTYPE K THERMOCOUPLEPR 
SCM5B47N-1247
-100 TO +900C0V TO +10V4HZTYPE N THERMOCOUPLEPR 
SCM5B47R-1105
0C TO +1750C0V TO +5V4HZTYPE R THERMOCOUPLEPR 
SCM5B47S-1074
0C TO +1750C0V TO +5V4HZTYPE S THERMOCOUPLEPR 
SCM5B47S-1443
0C TO +1750C0V TO 5V4HZTYPE S THERMOCOUPLEPR-IN shorted to +EXC
SCM5B47T-1160
0C TO +200C0V TO +5V50HZTYPE T THERMOCOUPLEPR< 20ms Response Time
SCM5B47T-1176
-350F TO +100F0V TO +5V4HZTYPE T THERMOCOUPLEQU-212C to +37.8C
SCM5B47T-1877
-150F TO +375F0V TO +10V200HZTYPE T THERMOCOUPLEPR 
* ... Status Codes: PR = Production, PT = Prototypes, QU = Quoted