Mitsubishi Electric FR-D700 Series, Instruction Manual

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25
2
WI
RI
NG
Control circuit specifications
(4) Signal inputs by contactless switches
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
2
to 0.75mm
2
gauge for connection to the control circuit terminals.
If the cable gauge is 1.25mm
2
or more, the front cover may be lifted when there are many cables running or the cables are
run improperly, resulting in a fall off of the front cover.
6) The maximum wiring length should be 30m.
7) Do not short terminal PC and SD. Inverter may be damaged.
The contacted input terminals of the inverter (STF, STR,
RH, RM, RL) can be controlled using a transistor
instead of a contacted switch as shown on the right.
External signal input using transistor
PC
R
STF, etc.
+24V
Inverter
Micro signal contacts Twin contacts