Mitsubishi Electric FR-A802-P Instruction Manual page 51

Control circuit
2.6.6
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 mm
• Tightening torque: 1.5 N·m
Connection method
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.
The terminals R1/L11 and S1/L21 are connected to the terminals P/+ and N/- with a jumper respectively. Do not connect the
power cable to incorrect terminals. Doing so may damage the inverter.
<Connection diagram>
Converter unit
MC
R/L1
S/L2
T/L3
(a) Remove the upper screws.
(b) Remove the lower screws.
(c) Pull the jumper toward you to remove.
(d) Connect the separate power supply cable for the control circuit to the upper terminals (R1/L11, S1/L21).
50
INSTALLATION AND WIRING
2 2
to 2 mm
Inverter
P/+ P/+
N/- N/-
R1/L11
S1/L21
Remove the jumper
(c)
Power supply terminal block
for the control circuit
(a)
(b)
(d)
Power supply terminal block
for the control circuit
R1/L11
S1/L21