Preparing your wiring layout – Rockwell Automation 1747-L40 SLC 500 Fixed Hardware Style User Manual
Page 67
Chapter 5
Wiring Your Control System
5–4
Careful wire routing within the enclosure helps to cut down electrical noise
between I/O lines. Follow these rules for routing your wires:
•
Route incoming power to the controller by a separate path from wiring to
I/O devices. Where paths must cross, their intersection should be
perpendicular.
Important: Do not run signal or communications wiring and power
wiring in the same conduit.
•
If wiring ducts are used, allow for at least two inches between I/O wiring
ducts and the controller. If the terminal strips are used for I/O wiring,
allow for at least two inches between the terminal strips and the
controller.
•
Segregate I/O wiring by signal type. Bundle wiring with similar electrical
characteristics together.
Wires with different signal characteristics should be routed into the enclosure
by separate paths.
!
ATTENTION: If the controller is being installed within a
potentially hazardous environment (that is, Class I, Division 2),
all wiring must comply with the requirements stated in the
National Electrical Code 501–4 (b).
Preparing Your Wiring Layout