Voltage / Current Measurement Unit


CM150_SA is designed for positive current measurement, with automatic current range switching, with
measurement ranges from 1mA to 200A(150A max).


  • Current ranges 1mA, 10mA, 100mA, 1A, 10A, 100A(50Amax), 200A(150Amax)
  • Unidirectional voltage and current measurement (in positive directions)
  • Automatic or manual current range selection
  • Over-current, sense buffer overload and over-temperature protection
  • Current range switching time 100us
  • Programmable range switching filters (time before range up/down switching) for load peaks suppression
  • DUT Voltages up to 70V
  • PLC control interface for Stand Alone mode without Ethernet control
  • Ethernet control interface Modbus-TCP
  • 0..10V analog outputs or internal sampling ADCs
  • Voltage and current sampling up to 100ksampl/s
  • PC delay sapling buffer for 2.5sec@100ksampl/s
  • Analog outputs calibration and digital calibration for sampled data
  • Configurable registers settings in EEPROM for stand alone using(use without Ethernet)
  • DHCP or Static-IP configuration and unique NetBIOS name(Host name)
  • Possibility of ADC calibration constants dedicated for every range extra.(If sampling over Ethernet is used.)
  • Logarithmic analog output 0..10V indicator for measured current(indicate values 200nA .. 150A)
  • Desktop use or on Top Hat Rail system holder (for EN 50022 – 35mm)




Output voltage is represented by voltage 0V – 10V on AO_V_value output pin or value sampled over Ethernet.
The voltage range is 70V (Or 50V selected with the jumper on main board).

Voltage range Accuracy FSR ADC LSB AO_V_value voltage
50V 0,1% 1,25mV 0V..+10V
70V 0,1% 1,75mV 0V..+10V



The current is represented by voltage 0V – 10V on AO_I_value output pin(according to the current range) or value sampled over Ethernet with selected range.

Current range Accuracy ADC LSB AO_I_value voltage
1mA 0,2% 25nA 0V..+10V
10mA 0,2% 250nA 0V..+10V
100mA 0,2% 2,5uA 0V..+10V
1A 0,1% 25uA 0V..+10V
10A 0,2% 250uA 0V..+10V
100A (50A limited) 0,2% 2,5mA 0V..+10V(+5V)
200A (150A limited) 0,6%* / 1,0% 5mA 0V..+10V (+7,5V)

*For analog output AO_I_value and digital reading are calibrated all ranges together(Offsets and Gains) on 1A
**The accuracy for digital reading is better than on AO_I_value analog output.The 200A range is calibrated for
digital reading with extra constant.



Using supply with sense wires input














Using supply without sense wires input














For further information, please contact us

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