Categories
CM150_SA
Voltage / Current Measurement Unit
Introduction
CM150_SA is designed for positive current measurement, with automatic current range switching, with
measurement ranges from 1mA to 200A(150A max).
Features
- 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)
Measurement
Voltage
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 |
Current
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
range
**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.
Wiring
Using supply with sense wires input
Using supply without sense wires input