Industrial signal conditioner


  • Galvanic isolation of input and output current loop
  • Power supply from current loops
  • Monitoring current loop without interrupting it
  • Input and Output overvoltage protection
  • Input and Output overcurrent protection
  • High linearity and temperature stability
  • Short response time
  • Low output ripple
  • 35mm DIN rail mounting


SCM 203 is a current isolator intended for mounting on DIN 35mm rail. It provides galvanic isolation of current sensing loops. Conversion is linear. Connecting of input (4-20mA) and output (4-20mA) current is two way and passive which means that converter is power supplied from current loops. By connecting voltmeter to test connectors it is possible to monitor loop current without interrupting it.


Analog signal conditioners convert, isolate, and amplify signals. SCM203 can convert 4 to 20 mA current signals to standard 4 to 20 mA signals. Also, it can isolate multiple field-measurement devices on a common power supply to help prevent interference that can occur due to ground loops or common-mode noise.


Accuracy±0.1% typical of full range
Temperature stability±0.02%/oC
Response time220msec (0-98%)
Output ripple0.1% of full range RMS
Upper cut-off frequency (-3dB)3kHz
Galvanic isolation5.3 KV RMS in 1sec
Voltage power supply of the loop10-32VDC
Output current4-20mA
Test connection40-200mV means 4-20mA (shunt 10ohm ±1%)
Output overvoltage protection33V transzorb
Output overcurrent protectionfuse slow 125mA 20x5mm
Loop resistanceRmax(ohms)=(Vpower supply-10)/0.02
Input current4-20mA/32V max
Test connection4-200mV means 4-20mA (shunt 10ohm ±1%)
Input overvoltage protection33V transzorb
Input overcurrent protectionfuse slow 125mA 20x5mm
Temperature range0-70 oC non condensed
Caseplastic case 35x90x70mm, IP50
MountingDIN 35mm rail


SCM20310068Industrial signal conditioner€65

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