5. PROCEDURES BEFORE SYSTEM OPERATION
MELSEC-A
5-8
5.5.3 Precautions
Against
Wiring
As one of the requirements to give full play to AJ71PB96F/A1SJ71PB96F’s functions and make up the
system with high reliability, it is necessary to have an external wiring unsusceptible to an influence of
noise. Precautions against external wiring of AJ71PB96F/A1SJ71PB96F is described below.
(1) Do not route the wire of AJ71PB96F/A1SJ71PB96F close to or bundle it together with the
main circuit and high-tension lines, or the load-carrying lines from other than the PC.
Otherwise, the module may be susceptible to an influence of noise and surge induction.
(2) The wires from the input/output modules of the PC should be away from the
communication cable of PROFIBUS-FMS interface module as far as possible as shown in
the figure below.
Shield twisted-pair cabl
Wiring of input
module
Wiring of output module
Shielded covering
P
o
w
e
r s
u
pp
ly
mo
d
u
le
PC CPU
In
pu
t mo
d
ule
In
pu
t mo
d
ule
Output
mod
u
le
Output
mod
u
le
AJ71P
B
96F/
A1SJ71
PB96F
