Wiring Instructions - Mitsubishi Electric FR-A700 Instruction Manual

Control circuit specifications
2.3.4

Wiring instructions

1) Terminals 5, SD and SE are common to the I/O signals and isolated from each other. Do not earth (ground). Avoid
connecting the terminal SD and 5 and the terminal SE and 5.
2) 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).
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) Do not apply a voltage to the contact input terminals (e.g. STF) of the control circuit.
5) Always apply a voltage to the alarm output terminals (A, B, C) via a relay coil, lamp, etc.
6) 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.
7) The wiring length should be 30m (98.43feet) (200m (656.17feet) for terminal FM) maximum.
Wiring of the control circuit of the FR-A720-02800 (FR-A740-01440) or more
For wiring of the control circuit of the FR-A720-02800 (FR-A740-01440) 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)
34
2
or more, the front cover may be lifted when there are many cables running or
Make cuts along the lines inside with
a cutter knife and such.
2
gauge for connection to the control circuit terminals.
Micro signal contacts
<Wiring>
Twin contacts