24
4. Wiring
Wiring Instructions
1. Always connect the power supply to the power input terminals R/L1,
S/L2, and T/L3 (R/L1, S/L2 for single-phase power) via a molded-
case circuit breaker (MCCB) or a fuse. Never connect the power
supply to terminals U/T1, V/T2, W/T3,
−
, +1, or +2.
Refer to page 119 for recommended peripheral devices. For single-
phase Inverters, always use terminals R/L1 and S/L2. Never connect
terminal T/L3.
Inverter Power Supply Connection Terminals
2. Connect the motor wiring to terminals U/T1, V/T2 and W/T3 on the
main circuit output side (bottom of the Inverter)
3. If the wiring distance between Inverter and motor is long, reduce the
Inverter carrier frequency. For details, refer to
Reducing Motor
Noise or Leakage Current Using Carrier Frequency Selection (n46)
on page 64.
4. Control wiring must be less than 50 m in length and must be sepa-
rated from the power wiring. Use shielded twisted-pair cable when
inputting the frequency signal externally.
5. Tighten the screws on the main circuit and control circuit terminals.
6. Do not connect or disconnect wiring, or perform signal check while
the power supply is turned ON.
7. For 400 V Class Inverters, always ground the supply neutral to con-
form to CE requirements.
8. Only basic insulation to meet the requirements of protection class 1
and overvoltage category II is provided with control circuit termi-
nals.
Additional insulation may be necessary in the end product to con-
form to CE requirements.
200-V 3-phase Input
Power Supply Speci-
fication Inverters
CIMR-J7
2
200-V Single Input
Power Supply Speci-
fication Inverters
CIMR-J7
B
400-V 3-phase Input
Power Supply Speci-
fication Inverters
CIMR-J7
4
Connect to R/L1,
S/L2, and T/L3.
Connect to R/L1 and
S/L2.
Connect to R/L1,
S/L2, and T/L3.