Hardware
Preface
MicroLogix 1000 Programmable Controllers User Manual
2–6
Remove the protective wrap before applying power to the controller.
Failure to remove the wrap may cause the controller to overheat.
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 501-4 (b).
•
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.
Note
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.
•
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.
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