Instruction manual

4. Wiring
31
emergency stop by using the external terminals.
Delayed response may cause injury or damage the
machine.
Wiring Instructions
1. Always connect the power supply for the main circuit
inputs 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, B1, B2, −,
+1, or +2. The Inverter may be damaged.
For single-phase Inverters, always use terminals R/L1 and
S/L2. Never connect terminal T/L3. Fuses must be of UL-
class RK5 fuse or an equivalent.
Refer to page 193 for recommended peripheral devices.
Inverter Power Supply Connection Terminals
2. 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 (n080) on page 81.
3. Control wiring must be less than 50 m in length and must
be separated from power wiring. Use shielded twisted-pair
cable when inputting the frequency signal externally.
4. Only basic insulation to meet the requirements of protec-
tion class 1 and overvoltage category II is provided with
control circuit terminals. Additional insulation may be
necessary in the end product to conform to CE require-
ments.
5. Closed-loop connectors should be used when wiring to the
main circuit terminals.
6. Voltage drop should be considered when determining the
200-V 3-phase Input
Power Supply Speci-
fication Inverters
CIMR-V72
200-V Single Input
Power Supply Speci-
fication Inverters
CIMR-V7B
400-V 3-phase Input
Power Supply Speci-
fication Inverters
CIMR-V7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.
NOTE