Wiring Of The Control Circuit - Mitsubishi Electric FR-E540 K-EC Series Instruction Manual

2.2.3 Wiring of the control circuit

(1) Wiring instructions
1) Terminals PC, SE and 5 (and SD when sink logic is selected) are common to the I/O
signals. These common terminals must not be earthed to the ground.
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 0.3mm
the control circuit terminals.
5) When bar terminals and solid wires are used for wiring, their diameters should be
0.9mm maximum If they are larger, screw threads may be damaged during
tightening.
(2) Terminal block layout
In the control circuit of the inverter, the terminals are arranged as shown below:
Terminal screw size: M2.5
Terminal layout of control circuit
RH
RM
RL
MRS
RES
SD
AM
PC
SE
RUN
FU
(3) Wiring method
1) For wiring the control circuit, use cables after stripping their sheaths.
Refer to the gauge printed on the inverter and strip the sheaths to the following
dimensions. If the sheath is stripped too much, its cable may be shorted with the
adjoining cable. If the sheath is stripped too little, the cable may come off.
INSTALLATION AND WIRING
2
to 0.75mm
A
B
C
10
2
5
4
SD
STF
STR
SD
7mm 1mm
22
2
gauge for connection to
2