Rockwell Automation 1785-Lxxx Enhanced and Ethernet PLC-5 Programmable Controllers - Manual (Page 39)

Publication 1785-UM012D-EN-P - July 2005
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.