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Mitsubishi Electric FR-F740-00023 Instruction Manual: Wiring Instructions

F700 series.
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Control circuit specifications
2.3.4

Wiring instructions

1)
It is recommended to use the cables of 0.75mm
If the cable gauge used is 1.25mm
the cables are run improperly, resulting in an operation panel contact fault.
2)
The maximum wiring length should be 30m.
3)
Use two or more parallel micro-signal contacts or twin contacts to
prevent a contact faults when using contact inputs since the
control circuit input signals are micro-currents.
4)
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).
5)
Do not apply a voltage to the contact input terminals (e.g. STF) of the control circuit.
6)
Always apply a voltage to the fault output terminals (A, B, C) via a relay coil, lamp, etc.
Wiring of the control circuit of the 01800 or more
For wiring of the control circuit of the 01800 or more, separate away from wiring of the main circuit.
Make cuts in rubber bush of the inverter side and lead wires.
Rubber bush
(view from the inside)
Make cuts along the lines inside with
a cutter knife and such.
28
2
gauge for connection to the control circuit terminals.
2
or more, the front cover may be lifted when there are many cables running or
Micro signal contacts
<Wiring>
Twin contacts

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