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Wiring; Wiring Instructions - Mitsubishi Electric MELSEC-A Series User Manual

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6.
LOADING AND INSTALLATION
MELSEC-A
6.4
Wiring
Wiring instructions for the system.
6.4.1
Wiring Instructions
I
Instructions for wiring the power cable of I/O cables.
(1) Wiring of power source
(a) When voltage fluctuations are larger than the specified value, con-
nect a constant-voltage transformer.
Ocnetent-
voltage
PC
transformer
(b) Use a power supply which generates minimal noise across wire and
across PC and ground. When excessive noise is generated, con-
nect an insulting transformer.
(c) When a power transformer of insulating transformer is employed to
reduce the voltage from 200 VAC to 100 VAC, use one with a
capacity greater than that indicated in the following table.
UO
equipment
"n" stands forthe number of
powersupply modules.
r -
.,
=nll~i
L __
~...Ij------<t
_ _
---.J
Insulating
transformer
PC
=D~.~J
-1..1_
Insulating
transformer
Power supply
Transformer
Module
Cepaclty
A2C
110VAxn
A66PC
(d) When wiring, separate the PC power source from those for I/O
equipment and power equipment as shown below:
Main
PC
Main
PC
power
power
power
power
source
source
source
source
T1
100VAC--o'""L:'""o---f
PC
I
2OOVAC---"'""E'""VO
~IIH
. r " . .
power source
T2
UO
UOeqUipmanl
~II~
power
~
source
r-.
o
Maincircuit
power source
PC
UO
equipment
Main
circuit
equipment
6-4

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