Cutler-Hammer D320 PLC, User Manual

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Chapter 4: Installation and Wiring
27
Leave at least 2 inches (50 mm) from the duct or other devices:
• To prevent overheating.
•
For easy replacement and wiring of the unit.
When using a link module, leave additional space at the bottom of the unit:
•
Leave 3 inches (80 mm) or more for the optical link module.
•
Leave 4 inches (100 mm) or more for the wire link module.
•
This allows for extra ventilation space and reduces noise interference.
When installing the PLC in a cabinet or enclosure:
• Leave 4 inches (100 mm) or more from the front surface of unit.
•
This area in front of the PLC helps to avoid the effects of emission, noise, and heat.
Expansion
Backplane
Base
Backplane
Duct or other
device
At least 2 in. (50 mm)
At least 2 in. (50 mm)
At least 2 in. (50 mm)
At least 2 in. (50 mm)