Rockwell Automation 1766-Lxxxx MicroLogix 1400 Programmable Controllers User Manual - Manual (Page 41)

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 27
Chapter
3
Wire Your Controller
This chapter describes how to wire your controller and expansion I/O. Topics
include:
• wire requirements
• using surge suppressors
• grounding the controller
• wiring diagrams
• sinking and sourcing wiring diagrams
• controller I/O wiring
• wiring your analog channels
• expansion I/O wiring
Wiring Requirements Wiring Recommendation
• Allow for at least 50 mm. (2 in.) between I/O wiring ducts or terminal
strips and the controller.
• Route incoming power to the controller by a path separate from the device
wiring. Where paths must cross, their intersection should be
perpendicular.
ATTENTION: Before you install and wire any device, disconnect
power to the controller system.
ATTENTION: Calculate the maximum possible current in each
power and common wire. Observe all electrical codes dictating the
maximum current allowable for each wire size. Current above the
maximum ratings may cause wiring to overheat, which can cause
damage.
United States Only: If the controller is installed within a potentially
hazardous environment, all wiring must comply with the requirements
stated in the National Electrical Code 501-10 (b).
TIP Do not run signal or communications wiring and power wiring in the
same conduit. Wires with different signal characteristics should be
routed by separate paths.