When using separate power supplies for the control circuit and the main circuit
Cable size for the control circuit power supply (terminals R1/L11 and S1/L21)
● Terminal screw size: M4
● Cable gauge: 0.75 mm² to 2 mm²
● Tightening torque: 1.5 Nm
When a fault occurs, opening of the electromagnetic contactor (MC) on the inverter power supply
side results in power loss in the control circuit, disabling the fault output signal retention. Terminals
R1/L11 and S1/L21 are provided to hold a fault signal. In this case, connect the power supply terminals
R1/L11 and S1/L21 of the control circuit to the input side of the MC.
Do not connect the power cable to incorrect terminals. Doing so may damage the inverter.
FR-F820-00250(5.5K) or lower, FR-F840-00126(5.5K) or lower
Remove the upper screws.
Remove the lower screws.
Remove the jumper.
Connect the separate power supply cable for the control circuit to the lower terminals (R1/L11,
2 - 58
Remove the jumper
Main circuit terminal block
Detailed view of the terminals
Power supply for control and main circuit
Installation and wiring