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5. WIRING
5.1 Precautions Against Wiring
As one of the requirements to give full play to A1SJ71PB93D’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 A1SJ71PB93D is described below.
(1) Do not route the wire of A1SJ71PB93D close to or bundle it
together with the main circuit and high-tension lines, or the load-
carrying lines from other than the PLC. Otherwise, the module may
be susceptible to an influence of noise and surge induction.
(2) The wires from the input/output modules of the PLC should be
away from the communication cable as far as possible as shown in
the figure below.
(3) Grounding
(a) When the A1SJ71PB93D is used, the FG and LG terminals of
the power supply module of the PLC should basically be
grounded.
(b) If communication cannot be performed after grounding
because of abnormal voltage applied to the FG terminal, the
module may be used without grounding.
Communication cable
Shielded
covering
Wiring of output module
Wiring of input
module
Power supply
module
PLC CPU
Output module
Output module
Input module
A1SJ71PB93D
Input module
