Mitsubishi Electric Melsec A Series - Wiring; Wiring Instructions

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 •
Main circuit
power source
PC
UO
equipment
Main
circuit
equipment
6-4