Wiring Instructions - Mitsubishi Electric FR-F740 EC Instruction Manual

Wiring
3.4.2

Wiring instructions

● Use shielded or twisted cables for connection to the control circuit terminals and run them
away from the main and power circuits (including the 230V relay sequence circuit).
● 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.
Micro signal contacts
● Do not apply a voltage to the contact input terminals (e.g. STF) of the control circuit.
● Always apply a voltage to the alarm output terminals (A, B, C) via a relay coil, lamp, etc.
● It is recommended to use the cables of 0.75mm² gauge for connection to the control circuit
terminals.
● If the cable gauge used is 1.25mm² or more, the front cover may be lifted when there are
many cables running or the cables are run improperly, resulting in an operation panel contact
fault.
● The wiring length should be 30m maximum.
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 cir-
cuit. Make cuts in rubber bush of the inverter side and lead wires.
(view from the inside)
Fig. 3-12: Wiring of the control circuit of the 01800 or more
FR-F700 EC
Twin contacts
Rubber bush
Make cuts along the lines inside with a cutter
knife and such.
Control circuit specifications
Fig. 3-11:
Contacts
I001021E
Wiring
I001022E
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