Allen-Bradley 1756-DHRIO - Preventing Electrostatic Discharge; Removal and Insertion Under Power

Publication 1756-UM514B-EN-P - February 2003
1756-DHRIO Module Description 1-7
Preventing Electrostatic
Discharge
The Data Highway Plus module is sensitive to electrostatic discharge.
Removal and Insertion
Under Power
You can install or remove the module while chassis power is applied
if you observe the following precautions.
Repeated electrical arcing causes excessive wear to contacts on both
the module and its mating connector. Worn contacts may create
electrical resistance that can affect module operation.
ATTENTION
!
This equipment is sensitive to electrostatic discharge,
which can cause internal damage and affect normal
operation. Follow these guidelines when you handle
this equipment:
· Touch a grounded object to discharge potential
static.
· Wear an approved grounding wriststrap.
· Do not touch connectors or pins on component
boards.
· Do not touch circuit components inside the
equipment.
· If available, use a static-safe workstation.
· When not in use, store the equipment in
appropriate static-safe packaging.
WARNING
!
When you insert or remove the module while
backplane power is on, an electrical arc can occur.
This could cause an explosion in hazardous location
installations. Be sure that power is removed or the
area is nonhazardous before proceeding.