Each SCM5B30 and SCM5B31 voltage input module provides a single channel of analog input which is filtered, isolated, amplified, and converted to a high-level analog voltage output (Figure 1). 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.

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 SCM5B30 and SCM5B31 modules provides protection against accidental connection of power-line voltages up to 240VAC.
  • Accepts Millivolt and Voltage Level Signals
  • 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
  • ±0.03% Accuracy
  • ±0.005% Linearity
  • ±1µV/°C Drift
  • CSA Certified, FM Approved, CE and ATEX Compliant
  • Mix and Match SCM5B Types on Backpanel
Analog Voltage Input Modules, Narrow Bandwidth

SCM5B30/31 Devices


Part Number Input RangeOutput RangeBandwidthMechanical FormatIsolation Voltage
-10 to +10 mV -5 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-10 to +10 mV -10 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-50 to +50 mV -5 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-50 to +50 mV -10 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-100 to +100 mV -5 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-100 to +100 mV -10 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-10 to +10 mV 0 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-10 to +10 mV 0 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-50 to +50 mV 0 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-50 to +50 mV 0 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-100 to +100 mV 0 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-100 to +100 mV 0 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-1 to +1 V -5 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-1 to +1 V -10 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-1 to +1 V -5 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-1 to +1 V -10 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-5 to +5 V -5 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-5 to +5 V -10 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-10 to +10 V -5 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-10 to +10 V -10 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-1 to +1 V 0 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-1 to +1 V 0 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-5 to +5 V 0 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-5 to +5 V 0 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-10 to +10 V 0 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-10 to +10 V 0 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-20 to +20 V -5 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-20 to +20 V -10 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-20 to +20 V 0 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-20 to +20 V 0 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-40 to +40 V -5 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-40 to +40 V -10 to +10 V 4 Hz Modular plug-in-board 1500 Vrms
-40 to +40 V 0 to +5 V 4 Hz Modular plug-in-board 1500 Vrms
-40 to +40 V 0 to +10 V 4 Hz Modular plug-in-board 1500 Vrms

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.

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.

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.

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.

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.

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.

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

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.

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.

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.

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

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.

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.

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.

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.

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
SCM5B30-1063
-100mV TO +100mV+1V TO +5V4HZVOLTAGE INPUTPR 
SCM5B30-1080
0mV TO +50mV0V TO +5V4HZVOLTAGE INPUTPR 
SCM5B30-1108
0mV TO +30mV-5V TO +5V4HZVOLTAGE INPUTPR 
SCM5B30-1136
-5mV TO +5mV-4.65V TO +4.65V5HZVOLTAGE INPUTPR3-pole filter
SCM5B30-1147
0mV TO +100mV0V TO +5V30HZVOLTAGE INPUTPR 
SCM5B30-1202
-100mV TO +100mV-5V TO +5V1.8KHZVOLTAGE INPUTPR4-pole butterworth filter
SCM5B30-1237
-250mV TO +250mV-2.5V TO +2.5V4HZVOLTAGE INPUTQU
SCM5B30-1353
-100mV TO +100mV-5V TO +5V250HZVOLTAGE INPUTPR 
SCM5B30-1419
-25mV TO +25mV-5V TO +5V1.8kHzVOLTAGE INPUTPR 
SCM5B30-1428
-25mV TO +25mV-5V TO +5V109HzVOLTAGE INPUTPR 
SCM5B30-1461
0mV TO +10mV-5V TO +5V4HZVOLTAGE INPUTPROpen input to +5.8V
SCM5B30-1491
0mV TO +30mV0V TO +5V4HZVOLTAGE INPUTPROpen input to +5.8V
SCM5B30-1520
0mV TO +20mV-5V TO +5V4HZVOLTAGE INPUTPROpen input to +5.8V
SCM5B30-1585
-50mV TO +50mV-10V TO +10V12HZVOLTAGE INPUTPR 
SCM5B30-1591
-50mV TO +50mV-10V TO +10V12HZVOLTAGE INPUTPRNo input pole, 1.7% over-shoot (@ 6Hz)
SCM5B30-1694
-100mV TO +100mV-10V TO +10V10HZVOLTAGE INPUTPR 
SCM5B31-1009
-10V TO +10V-5V TO +5V100HZVOLTAGE INPUTPR 
SCM5B31-1013
0V TO +2V0V TO +5V4HZVOLTAGE INPUTPR10M Ohm Input Impedance
SCM5B31-1016
0V TO +10V0V TO +5V4HZVOLTAGE INPUTQU 
SCM5B31-1025
-5V TO +5V-5V TO +5V480HZVOLTAGE INPUTPR 
SCM5B31-1065
0V TO +2.5V-5V TO +5V4HZVOLTAGE INPUTQU 
SCM5B31-1069
-5V TO +5V0V TO +5V120HZVOLTAGE INPUTPR1M Ohm Input Impedance
SCM5B31-1070
-10V TO +10V0V TO +5V120HZVOLTAGE INPUTPR1M Ohm Input Impedance
SCM5B31-1071
-3V TO +3V0V TO +5V4HZVOLTAGE INPUTQU 
SCM5B31-1076
-5V TO +5V-5V TO +5V4HzVOLTAGE INPUTPR1M Ohm Input Impedance
SCM5B31-1078
-10V TO +10V-5V TO +5V400HZVOLTAGE INPUTPR 
SCM5B31-1089
0V TO +6V-5V TO +5V4HZVOLTAGE INPUTQU 
SCM5B31-1092
-10V TO +10V-10V TO +10V1KHZVOLTAGE INPUTPR 
SCM5B31-1093
-5V TO +5V-10V TO +10V1KHZVOLTAGE INPUTPR 
SCM5B31-1094
-1V TO +1V-10V TO +10V1KHZVOLTAGE INPUTPR2M Ohm Input Impedance
SCM5B31-1109
0V TO +5V-5V TO +5V4HZVOLTAGE INPUTPR 
SCM5B31-1131
+/-2.5V, +/-5V, +/-10V-5V TO +5V11HZTHREE INPUT RANGESPRBessel (Thomson) filter
SCM5B31-1137
0V TO +15V-5V TO +5V1KHZVOLTAGE INPUTPR 
SCM5B31-1158
-10V TO +10V-5V TO +5V15HZVOLTAGE INPUTPR 
SCM5B31-1159
-10V TO +10V-10V TO +10V50HZVOLTAGE INPUTPR 
SCM5B31-1171
0V TO +10V+1V TO +5V4HZVOLTAGE INPUTQU 
SCM5B31-1172
-1V TO +1V-5V TO +5V11HZVOLTAGE INPUTPRBessel (Thomson) filter
SCM5B31-1197
-20V TO +20V-5V TO +5V30HZVOLTAGE INPUTPR 
SCM5B31-1201
-10V TO +10V0V TO +5V100HZVOLTAGE INPUTPR 
SCM5B31-1217
-10V TO +10V-5V TO +5V10HZVOLTAGE INPUTPR 
SCM5B31-1218
0V TO +10V0V TO +5V0.5HZVOLTAGE INPUTPR1.5mV Accurate at 5V input
SCM5B31-1233
-5V TO +5V-5V TO +5V10HZVOLTAGE INPUTPR 
SCM5B31-1242
-1V TO +1V-5V TO +5V4HZVOLTAGE INPUTPR200MOhm input impedence
SCM5B31-1245
0 TO 50V0V TO +10V0.5HZVOLTAGE INPUTPR 
SCM5B31-1249
-5V TO +5V-5V TO +5V400HZVOLTAGE INPUTPR+/- 0.03% accurate upon shipment
SCM5B31-1261
0 TO 30V-5V TO +5V4HZVOLTAGE INPUTPR 
SCM5B31-1266
0 TO +10V0 TO +10V4HZVOLTAGE INPUTPRBuilt same as SCM5B31-03D
SCM5B31-1267
0 TO +20V0 TO +10V4HZVOLTAGE INPUTQUBuilt same as SCM5B31-07D
SCM5B31-1268
0 TO +1V0 TO +10V4HZVOLTAGE INPUTQUBuilt same as SCM5B31-01D
SCM5B31-1275
-10V TO +10V-10 TO +10V20HZVOLTAGE INPUTPR 
SCM5B31-1276
-10V TO +10V-5V TO +5V10HZVOLTAGE INPUTPRmin phase requirements
SCM5B31-1305
+1 TO +5V+0.5V TO +4.5V4HZVOLTAGE INPUTQU 
SCM5B31-1306
+0.4V TO +2V+0.5V TO +4.5V4HZVOLTAGE INPUTQU 
SCM5B31-1307
-6V TO +6V+0.5V TO +4.5V4HZVOLTAGE INPUTQU 
SCM5B31-1308
-10V TO +10V+0.5V TO +4.5V4HZVOLTAGE INPUTQU 
SCM5B31-1309
0 TO +10V+0.5V TO +4.5V4HZVOLTAGE INPUTQU 
SCM5B31-1310
-5V TO +5V+0.5V TO +4.5V4HZVOLTAGE INPUTQU 
SCM5B31-1311
0 TO 2V+0.5V TO +4.5V4HZVOLTAGE INPUTQU 
SCM5B31-1312
-0.9V TO +6.3+0.5V TO +4.5V4HZVOLTAGE INPUTQU 
SCM5B31-1347
-1V TO +1V-5V TO +5V100HZVOLTAGE INPUTPRBessel (Thomson) filter
SCM5B31-1350
0 TO +50V0 TO +2.5V0.5HZVOLTAGE INPUTPR+/-0.05% max error @ Vin =5V
SCM5B31-1351
0 TO +10V0 TO +2.5V0.5HZVOLTAGE INPUTPR+/-0.03% max error @ Vin =5V
SCM5B31-1354
0 TO +5V0 TO +5V4HZVOLTAGE INPUTPR 
SCM5B31-1355
-2V TO +2V-5V TO +5V4HZVOLTAGE INPUTPR 
SCM5B31-1367
-5V TO +5V-5V TO +5V30HZVOLTAGE INPUTPR 
SCM5B31-1388
-2V TO +2V-5V TO +5V250HzVOLTAGE INPUTPR 
SCM5B31-1391
-3V TO +3V-5V TO +5V4HzVOLTAGE INPUTQU 
SCM5B31-1393
-1V TO +1V0V TO +5V100HzVOLTAGE INPUTPR 
SCM5B31-1394
-5V TO +5V0V TO +5V100HzVOLTAGE INPUTPR 
SCM5B31-1400
-10V TO +10V-5V TO +5V200HzVOLTAGE INPUTPR 
SCM5B31-1420
-10V TO +10V-5V TO +5V1.8kHzVOLTAGE INPUTPR 
SCM5B31-1421
-15V TO +15V-5V TO +5V4HzVOLTAGE INPUTPR 
SCM5B31-1462
0V TO +1V-5V TO +5V4HZVOLTAGE INPUTPROpen input to -5V
SCM5B31-1485
0V TO +20V-5V TO +5V4HzVOLTAGE INPUTPROpen input to -5V
SCM5B31-1497
0V TO +10V-5V TO +5V4HzVOLTAGE INPUTPROpen input to -5V
SCM5B31-1511
-1V TO +1V-5V TO +5V10HzVOLTAGE INPUTPR 
SCM5B31-1517
0V TO +3.5V-5V TO +5V4HZVOLTAGE INPUTPROpen input to -5V
SCM5B31-1521
0V TO +3V-5V TO +5V4HZVOLTAGE INPUTPROpen input to -5V
SCM5B31-1615
0V TO +50V0V TO +2.5V10HZVOLTAGE INPUTPROutput voltage limit -0.7V to +5.1V
SCM5B31-1718
-10V TO +10V-10 TO +10V30HZVOLTAGE INPUTPR 
SCM5B31-1818
-5V TO +5V-5 TO +5V100HZVOLTAGE INPUTPR 
SCM5B31-C087
0V TO +50V0V TO +5V4HZVOLTAGE INPUTPR2M Ohm Input Impedance
SCM5B31-C088
0V TO +100V0V TO +5V4HZHIGH VOLTAGE INPUTPR 
SCM5B31-C091
-1V TO +1V-5V TO +5V120HZVOLTAGE INPUTPR2M Ohm Input Impedance
SCM5B31-C092
0V TO +50V0V TO +5V0.5HZVOLTAGE INPUTPR 
SCM5B31-C093
0V TO +20V0V TO +5V4HZVOLTAGE INPUTPR 
* ... Status Codes: PR = Production, PT = Prototypes, QU = Quoted