SCM 203

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  • 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
  • DIN 35mm 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.

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Technical specifications
Accuracy 0.1% typical of full range
Temperature stability 0.02%/oC
Response time 220msec (0-98%)
Output ripple 0.1% of full range RMS
Gornja granična frekvencija (-3dB) 3kHz
Galvanic isolation 5.3 KV RMS in 1sec
Napon napajanja petlje 10-32VDC
Output current 4-20mA
Test connection 40-200mV means 4-20mA (shunt 10ohm 1%)
Output overvoltage protection 33V transzorb
Output overcurrent protection fuse slow 125mA 20x5mm
Loop resistance Rmax(ohms)=(Vpower supply-10)/0.02
Input current 4-20mA/32V max
Test connection 4-200mV means 4-20mA (shunt 10ohm 1%)
Input overvoltage protection 33V transzorb
Input overcurrent protection fuse slow 125mA 20x5mm
Temperature range 0-70 oC non condensed
Case plastic case 35x90x70mm, IP50
Mounting DIN 35mm rail