Wiring Precautions - Mitsubishi Electric Melsec Q Series User Manual

5
SETTINGS AND PROCEDURES BEFORE SYSTEM
OPERATION

5.5.2 Wiring precautions

As one of the requirements to give full play to the functions of the QJ71PB92V 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 than 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
controllers power supply module.
Wiring of input module
Wiring of output module
Shield jacket
Figure 5.8 Programmable Controller Wiring
5.5 Wiring
5.5.2 Wiring precautions
Input module
Output module
QJ71PB92V
PROFIBUS cable
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