Circutor CEM-C12, Instruction Manual, Page: 21 / 28

8.- TECHNICAL FEATURES
Power supply
Mode
Self-powered
Voltage Measurement
Connection Single-phase
Reference voltages 230 V ~
Frequency
CEM-C12 50 / 60 Hz
CEM-C12-MID 50 Hz
Power consumption ≤ 10 VA, ≤ 0.4 Wh
Current measurement
Current
0.25 ... 5 A
Maximum current (Imax) 100 A
Starting current 0.004 Ib
Accuracy
Accuracy
CEM-C12 Class 1 (IEC 62053-21)
CEM-C12-MID
Class B (EN50470)
RS-485 Communications
Bus RS-485
Protocol Modbus RTU
Baud rate 9600 - 19200 - 38400
User interface
Display
LCD
Maximum counter value 99999.9 kWh
Keys 1 key
LED (kWh)
1000 imp/kWh ( width: 90 ms)
Environmental features
Operating temperature
CEM-C12
-20ºC... +65ºC
CEM-C12-MID -25ºC... +55ºC
Relative humidity (maximum value)
95%
Average humidity value of year 75%
Mechanical features
Dimensions ( Figure 12) 90 x 18 x 72 mm
Weight 0.10 kg
Enclosure ABS, PC alloy material
Protection degree
IP 51 (indoor)
Connections
RS-485 (B-, S, A+)
≤ 1.5 mm
2
0.4 Nm Flat, PH2
Neutral (N)
≤ 1.5 mm
2
0.4 Nm Flat, PH2
Measure (L, LOAD) ≤ 22 mm
2
≤ 3 Nm Flat, PZ2
Standards
Electrical energy metering equipment (AC)� Particular requirements� Part 21: Static
active energy meters (classes 1 and 2)
IEC 62053-21
21
Instruction Manual
CEM-C12