Wiring Instructions - Mitsubishi Electric FR-D720-008 Instruction Manual

2.3.4

Wiring instructions

1) Use shielded or twisted cables for connection to the control circuit terminals and run them away from the main and power
circuits (including the 200V relay sequence circuit).
2) Use two or more parallel micro-signal contacts or twin contacts to prevent
contact faults when using contact inputs since the control circuit input signals
are micro-currents.
3) Do not apply a voltage to the contact input terminals (e.g. STF) of the control
circuit.
4) Always apply a voltage to the fault output terminals (A, B, C) via a relay coil, lamp, etc.
5) It is recommended to use the cables of 0.3mm
If the cable gauge is 1.25mm
run improperly, resulting in a fall off of the front cover.
6) The maximum wiring length should be 30m (98.43feet).
7) Do not short terminal PC and SD. Inverter may be damaged.
2
to 0.75mm
2 or more, the front cover may be lifted when there are many cables running or the cables are
Control circuit specifications
Micro signal contacts
2
gauge for connection to the control circuit terminals.
Twin contacts
2
27