Omron RX User Manual page 45

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.
(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)
* To separate the control circuit power supply (Ro, To) from the main circuit power supply (R/L1, S/
L2, T/L3), observe the following instructions:
• For wiring between terminals Ro and To (terminal screw size: M4), use a cable of 1.25 mm
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/L1, S/L2, T/L3), 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 (11 to
15) and relay output terminals (AL2, AL1, AL0) 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.)
(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.
2-2 Wiring
2
2
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