Wiring Instructions - Mitsubishi Electric FR-E720-600 Instruction Manual

Control circuit specifications
(4) Signal inputs by contactless switches
The contacted input terminals of the inverter (STF, STR,
RH, RM, RL, MRS, RES) can be controlled using a
transistor instead of a contacted switch as shown on the
right.
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 used is 1.25mm
cables are run improperly, resulting in an operation panel contact fault.
6) The maximum wiring length should be 30m (98.43feet).
26
2 2
to 0.75mm gauge for connection to the control circuit terminals.
2
or more, the front cover may be lifted when there are many cables running or the
STF, etc.
Inverter
SD
External signal input using transistor
Micro signal contacts
+24V
Twin contacts