Hitachi SJ700D-3 SERIES Quick Reference Manual page 48

Chapter 2 Installation and Wiring
(5) Connecting the control circuit to a power supply separately from the main circuit.
If the protective circuit of the inverter operates to open the magnetic contactor in the input power supply circuit,
the inverter control circuit power is lost, and the alarm signal cannot be retained. To retain the alarm signal,
connect control circuit terminals R0 and T0 to a power supply. In details, connect the control circuit power
supply terminals R0 and T0 to the primary side of the magnetic contactor as shown below.
(Connection method)
Power-receiving specifications
200 V class model:
200 to 240 V (+10%, -15%)
(50/60 Hz ±5%), (282 to 339 VDC)
400 V class model:
380 to 480 V (+10%, -15%)
(50/60 Hz ±5%), (537 to 678 VDC)
Note the following when connecting separate power supplies to control circuit power supply terminals (R0 and T0) and
main circuit power supply terminals (R, S, and T):
- Use a cable thicker than 1.25 mm
- Connect a 3A fuse in the control circuit power supply line. (Tightening torque: 1.2Nm,max torque: 1.4Nm)
- If the control circuit power supply (connected to R0 and T0) is turned on earlier than the main circuit power supply
(connected to R, S, and T), ground fault is not checked at power-on.
- When supplying DC power to the control circuit power supply terminals (R0 and T0), specify "00" as the "a/b (NO/NC)"
selection (function code C031 to C036) for intelligent output terminals ([11] to [15]) and intelligent relay terminals (AL0,
AL1, and AL2). If "01" is specified as the "a/b (NO/NC)" selection, output signals may chatter when the DC power supply
is shut off.
2
to connect the terminals R0 and T0 (terminal screw size: M4).
2 - 18
1. Remove the connected cables.
2. Remove the J51 connector.
3. Connect the control circuit power
supply cables to the control circuit
power supply terminal block.
J51