Rockwell Automation Publication 2080-UM002L-EN-E - November 2021 45
Chapter 4
Wire Your Controller
This chapter provides information on the Micro830, Micro850, and Micro870
controller wiring requirements. It includes the following sections:
Wiring Requirements and
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
devi
ce wiring. Where paths must cros
s, their intersection should be
perpendicular.
Topic Page
Wiring Requirements and Recommendation 45
Use Surge Suppressors 46
Recommended Surge Suppressors 47
Grounding the Controller 48
Wiring Diagrams 49
Controller I/O Wiring 53
Minimize Electrical Noise 53
Analog Channel Wiring Guidelines 53
Minimize Electrical Noise on Analog Channels 54
Grounding Your Analog Cable 54
Wiring Examples 54
Embedded Serial Port Wiring 55
WARNING: Before you install and wire any device, disconnect power to the
controller system.
WARNING: 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).
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.
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