Placing System Hardware 3-3

 

 

Protecting Your Controller

You provide the enclosure for your controller system. This enclosure protects

 

your controller system from atmospheric contaminants such as oil, moisture,

 

dust, corrosive vapors, or other harmful airborne substances. To help guard

 

against electromagnetic interference (EMI) and radio frequency interference

 

(RFI), we recommend a steel enclosure.

 

Mount the enclosure in a position where you can fully open the doors. You

 

need easy access to controller wiring and related components so that

 

troubleshooting is convenient.

 

When you choose the enclosure size, allow extra space for transformers,

 

fusing, disconnect switch, master control relay, and terminal strips.

Preventing Electrostatic

Discharge

ATTENTION

Under some conditions, electrostatic discharge can degrade performance or damage the controller. Read and observe the following precautions to guard against electrostatic damage.ESD protection

Wear an approved wrist strap grounding device when handling the controller.

Touch a grounded object to discharge yourself before handling the controller.

Do not touch the backplane connector or connector pins.

Publication 1785-UM012D-EN-P - July 2005

Page 39
Image 39
Bradley Smoker PLC-5 Preventing Electrostatic Discharge, Protecting Your Controller, RFI, we recommend a steel enclosure