Wiring Of The Control Circuit - Mitsubishi Electric FR-A520-0.4K -55K Instruction Manual

2.2.3 Wiring of the control circuit

( 1 ) Wiring instructions
1) Terminals SD, SE and 5 are common to the I/O signals and isolated from each other. These common
terminals must not be connected to each other or earthed.
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) The frequency input signals to the control circuit are micro currents. When contacts are required, use two
or more parallel micro signal contacts or a twin contact to prevent a contact fault.
4) It is recommended to use the cables of 0.75mm
If the cable gauge used is 1.25mm
running or the cables are run improperly, resulting in an operation panel or parameter unit contact fault.
( 2 ) Terminal block layout
•Japanese and NA version
In the control circuit of the inverter, the terminals are arranged as shown below:
Terminal screw size: M3.5
•EC version
Terminal screw size: M3.5
A B C
SE RUN SU
<Wiring procedure>
1) For the wiring of the control circuit, strip the sheaths of the cables and use them as they are.
Strip the sheath to the following dimension. A too long stripping dimension may cause a short circuit with
the neighboring cable. A too short dimension may cause cable disconnection.
6mm ± 1mm
2) Loosen the terminal screw and insert the cable into the terminal.
3) Tighten the screw to the specified torque.
Undertightening can cause cable disconnection or malfunction. Overtightening can cause a short circuit or
malfunction due to the screw or unit damaged.
Tightening torque: 5 to 6 kgf⋅cm
Note: Wire the stripped cable by twisting it to prevent it from becoming loose. (Do not plate the cable with
solder.)
Note: 1. Use a NFB (No fuse breakers) or fuse on the inverter input (primary) side.
2. Make sure that the control circuit terminal wiring does not touch power circuit terminals (or
screws) or conducting power circuit.
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2
gauge for connection to the control circuit terminals.
2
or more, the front cover may be lifted when there are many cables
A B C PC AM 10E 10
RL RM RH RT AU STOP MRS
SE RUN SU IPF OL FU SD
SD AM 10E 10 2 5 4
LPF OL FU STOP MRS RES PC
18
INSTALLATION AND WIRING
2 5 4 1
RES SD FM
STF STR JOG CS
1 RL RM RH RT AU
STF STR JOG CS FM SD