Other Precautions; Example: Separating Plc From Power Lines - Omron CJ2 CPU UNIT User Manual

Cj2 cpu unit hardware
Hide thumbs Also See for CJ2 CPU UNIT:
Table of Contents

Advertisement

• Power cables and signal cables adversely affect each other. Do not wire them in parallel.
• Noise induction may occur if the PLC is installed in a panel that includes high-voltage devices.
Whenever possible, wire and install them separately. (Refer to PLC Installation Location on page
45.)
• Either install the PLC a minimum of 200 mm from high-voltage lines or power lines, or place the
high-voltage lines or power lines in metal tubing and completely ground the metal tubing to 100 Ω
or less.

Other Precautions

• Basic I/O Units have both plus and minus commons, so pay attention to the polarity when wiring.
• Optical fiber cable looks like ordinary communications cable or power cable, but internally it con-
sists of fibers, tension members, other protective materials. It must be handled with care. In partic-
ular, optical fiber cable must be installed according to prescribed methods and standards. Do not
subject optical fiber cable to severe tensile shock, excessive bending, twisting, or excessive con-
striction. For details on wiring optical fiber cables, refer to the following manuals.
• SYSMAC H-PCF Optical Fiber Cables Installation Guide (Cat. No. W156)
• Optical Ring Controller Link Units Operation Manual (Cat. No. W370)
CJ2 CPU Unit Hardware User's Manual
Panel with power line
Power line
Power line
200 mm
PLC
200 mm

Example: Separating PLC from Power Lines

Metal tubing
PLC
Ground of 100 Ω or less
5 Installation
5
5-49

Hide quick links:

Advertisement

Table of Contents
loading

Table of Contents