Mitsubishi Electric RJ71PB91V-U-IN-E User Manual page 31

Precautions
To make full use of the functions of the RJ71PB91V and to configure a highly reliable system, the external wiring should be
resistant to noise.
The following are precautions for the external wiring of the RJ71PB91V.
• Do not route the communication cable of the RJ71PB91V near the main circuit, power cable, or load cable other than that
of the programmable controller. In addition, do not bundle those cables together. Otherwise the RJ71PB91V may be
affected by noise or surge induction.
• Place the PROFIBUS cable as far away from the I/O module cable as possible.
(1)
(2)
(3)
(4)
(1) Power supply module
(2) Input module wiring
(3) Output module wiring
(4) Shield jacket
(5) PROFIBUS cable
• As a rule, to use the RJ71PB91V, ground the FG and LG terminals of the power supply module of the programmable
controller.
• Place the communication cables and power cables connected to the module in a duct or clamp them. If not, dangling cable
can swing or inadvertently be pulled, resulting in damage to the module or the cable or malfunction due to poor contact.
• Do not touch the core of the cable-side or module-side connector, and protect it from dirt or dust. If oil from your hand, dirt,
or dust is attached to the core, transmission loss can increase, causing communication failures.
• Securely connect the connector to the module.
• Tighten the screws within the specified torque range. Undertightening can cause drop of the screw, short circuit, or
malfunction. Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.
• When disconnecting the cable from the module, do not pull the cable by the cable part. For the cable with connector, hold
the connector part of the cable. Pulling the cable connected to the module may result in malfunction or damage to the
module or cable.
RJ71PB91V
(5)
6
6 WIRING
29
6.1 Connectors