Rockwell Automation Publication 2080-UM001B-EN-E - November 2011 17
Chapter
4
Wire Your Controller
Wiring Requirements
• 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.
• Separate wiring by signal type. Bundle wiring with similar electrical
characteristics together.
• Separate input wiring from output wiring.
• Label wiring to all devices in the system. Use tape, shrink-tubing, or other
dependable means for labeling purposes. In addition to labeling, use
colored insulation to identify wiring based on signal characteristics. For
example, you may use blue for DC wiring and red for AC wiring.
Using Surge Suppressors
Because of the potentially high current surges that occur when switching
inductive load devices, such as motor starters and solenoids, the use of some type
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.
Wire Requirements
Wire Size
Micro810 Controllers 0.32... 2.1 mm² (22...14 AWG) solid copper wire or
0.32... 1.3 mm² (22...16 AWG) stranded copper wire
rated at 90 °C (194 °F ) insulation max.
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