Control Circuit Wiring Precautions; Main Circuit Terminals; Control Circuit Terminals - Omron CIMR-L7Z Quick Manual

Leakage current is caused by the Inverter. Therefore, if the distance between the ground electrode and the
ground terminal is too long, potential on the ground terminal of the Inverter will become unstable.
When more than one Inverter is used, do not to loop the ground wire.
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Control Circuit Wiring Precautions

Consider the following precautions for wiring the control circuits.
Separate control circuit wiring from main circuit wiring (terminals R/L1, S/L2, T/L3, B1, B2, U/T1, V/T2,
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W/T3,
Separate wiring for control circuit terminals MA, MB, MC, M1, M2, M3, M4, M5, and M6 (contact out-
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puts) from wiring to other control circuit terminals.
If an optional external power supply is used, it should be a UL Listed Class 2 power supply.
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Use twisted-pair or shielded twisted-pair cables for control circuits to prevent operating faults.
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Ground the cable shields with the maximum contact area of the shield and ground.
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Cable shields have to be grounded on both cable ends.
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Main Circuit Terminals

Main circuit terminal functions are summarized according to terminal symbols in
correctly for the desired purposes.
Main circuit power input
Inverter outputs
DC bus terminals
Braking Resistor Unit connection
DC reactor connection
Braking Unit connection
Ground
Control Power Supply

Control Circuit Terminals

Fig 2 shows the control terminal arrangement. The functions of the control circuit terminals are shown in
Table 2. Use the appropriate terminals for the correct purposes.
EN-7
OK
, 1, 2, and 3, PO, NO) and other high-power lines.
Table 1 Main Circuit Terminal Functions (200 V Class and 400 V Class)
Purpose Terminal Symbol
R/L1, S/L2, T/L3
R1/L11, S1/L21, T1/L31
U/T1, V/T2, W/T3
1,
B1, B2
1, 2
3,
PO, NO
SC SC SC BB
E(G) S1 S2 S3 S4
Fig 2 Control terminal arrangement
NO
Fig 1 Ground Wiring
200 V Class
23P7 to 2055
2022 to 2055
23P7 to 2055
23P7 to 2055
23P7 to 2018
23P7 to 2018
2022 to 2055
23P7 to 2055
23P7 to 2055
+V A1 AC M5 M6 MA MB MC
S5 S6 S7 BB1 M3 M4
Table 1. Wire the terminals
Model: CIMR-L7Z
400 V Class
43P7 to 4055
4022 to 4055
43P7 to 4055
43P7 to 4055
43P7 to 4018
43P7 to 4018
4022 to 4055
43P7 to 4055
43P7 to 4055
M1 M2 E(G)