2-2 Wiring „ Connection for Separating Inverter Control Circuit Power Supply from Main Power Supply If the Inverter protection circuit is activated to turn off the magnetic contactor of the Inverter input power supply, the power to the Inverter control circuit is also turned off, and the alarm signal cannot be kept on. If the alarm signal must be kept on, use control circuit power supply terminals Ro and To. Connect control circuit power supply terminals Ro and To to the primary circuit of the magnetic contactor according to the following procedure.
2 Design * To separate the control circuit power supply (Ro-To) from the main circuit power supply (R, S, T), observe the following instructions: • For wiring between terminals Ro and To (terminal screw size: M4), use a cable of 1.25 mm 2 or more. • Connect a 3 A fuse to the control circuit power supply cable. • If the control circuit power supply (Ro-To) is turned on before the main circuit power supply (R, S, T), ground fault detection at power-on is disabled.
• To use a DC power supply for the control circuit power supply (Ro-To), set the multi-function output terminal contact selection (C031 to C036) for the multi-function output terminals (P1 to P5) and relay output terminals (MA, MB, MC) to "00". If the multi-function output terminal contact selection is set to "01", the output signal may chatter when the DC power supply is turned off. • Tightening torque for terminals Ro and To M4: 1.2 N•m (1.4 max.) 2-18 (Connection method) Incoming electricity specifications 200-V class: 200 to 240 V (+10%, -15%) 50, 60 Hz ±5% (282 to 339 V DC) 400-V class: 380 to 480 V (+10%, -15%) 50, 60 Hz ±5% (537 to 678 V DC) (1) Disconnect the connected wire.
(2) Disconnect the J51 connector. (3) Connect the control circuit power cable to the control circuit power supply terminal block.