Precautions Against Wiring - Mitsubishi A1SJ71PB92D User Manual

5. PROCEDURES BEFORE SYSTEM OPERATION
5.5.3
As one of the requirements to give full play to AJ71PB92D/A1SJ71PB92D'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 AJ71PB92D/A1SJ71PB92D is described below.
(1) Do not route the wire of AJ71PB92D/A1SJ71PB92D 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) Keep the wires from the input/output modules of the PLC away from the communication
cable as much as possible as shown below.

Precautions against wiring

Wiring of input
module
Wiring of output module
Shielded covering
5-8
MELSEC-A
Shield twisted-pair cable