10
CVM-C4
Instruction Manual
current of 0�25 A.
If the voltage to be measured is higher than the nominal input voltage, a voltage transformer
must be connected to the device.
If more than one device is connected to the current transformer, they must be connected in
series.
Before disconnecting the current measurement connection cables, be sure to disconnect the
transformer’s primary cables and bridge the secondary.
The device can operate in three-wire, three-phase mode or four-wire, three-phase mode, the
user selecting the corresponding connection mode according to the installation. An incorrect
type of connection or an error in phase sequence may cause measurement errors.
3.3.- DEVICE TERMINALS
Table 4: List of CVM-C4 terminals
Device terminals
1: L/+, Power supply 15: RO1, Relay Output 1 (Common)
2: N/-, Power supply 16: Relay Output 1 (NO) / Relay Output 2 (Common)
4: I1 S1, Current input L1 17: RO2: Relay output 2 (NO)
5: I1 S2, Current input L1 47: +, Impulse output 1
6: I2 S1, Current input L2 48: -, Impulse output 1
7: I2 S2, Current input L2
49: +, Impulse output 2
8: I3 S1, Current input L3 50: -, Impulse output 2
9: I3 S2, Current input L3 58: A, RS-485
11: U1, Voltage input L1 59: B, RS-485
12: U2, Voltage input L2 70: Common digital inputs
13: U3, Voltage input L3 71: DI1, Digital input 1
14: UN / U2, Voltage input N/L2 72: DI2, Digital input 2
5849 50 21
49
47
48
4
1
4 5
6 7
5
6
7
8
9
8
9
11
12
13 14
47 48 59 70 71 72 15 16 17 18
59
50
58
72
70
71
17
15
16
2
14
13
11
12
Figure 4: CVM-C4 terminals
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