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5.2 Wiring precautions
As one of the requirements to give full play to QJ71PB92V’s functions
and make up the system with high reliability, it is necessary to have an
external wiring unsusceptible to an influence of noise.
The following gives the precautions for external wiring of the
QJ71PB92V.
(1) Communication cable wiring
Do not install the QJ71PB92V communication cable together with
the main circuit, power lines and/or load carrying wires for other then
the programmable controller, or bring them close.
Doing so may cause the QJ71PB92V to be affected by noise and
surge induction.
(2) Wirings from programmable controller and I/O modules
Keep the PROFIBUS cable away from I/O module cables as much
as possible.
(3) Grounding
For use of the QJ71PB92V, ground the FG and LG terminals of the
programmable controller's power supply module.
Figure 5.4 Programmable controller wiring
Input module
Output module
QJ71PB92V
Wiring of input module
Wiring of output module
Shield jacket
PROFIBUS cable
