P
1
P
L.
c
c
c
C.
c
6.
LOADING
AND
INSTALLATION
/MELSEC-A
(3)
Grounding
(a)
The A series
PC
has good noise resistance. Therefore, the
PC may be used without grounding except when there is
excessive noise.
However, follow (b) to
(e)
described below.
(b) Ground the PC as independently as possible. Class
3
grounding should be used (grounding resistance
100
0
or
less).
El0
equipment
(c) When independent grounding is impossible, use the joint
grounding method as shown in the figure below
(2).
ma
equipment
(d)
Use
2
mm2
(14
AWG) or thicker grounding wire. Ground-
ing point should be as near as possible to the PC to
minimize the distance
of
grounding cable.
(e) Should incorrect operation occur due to grounding, dis-
connect one or both
of
the LG and
FG
terminals of base
units from the grounding.
c.
c
.
6-7
IB
INAl
6623SA
--__
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