Rockwell Automation 1769-L20_L30 CompactLogix Controller Installation Instructions - Manual (Page 7)

1769-L20, 1769-L30 CompactLogix™ Controllers 7
Publication 1769-IN047C-EN-P - April 2003
Install the Controller
The 1769-L20 and 1769-L30 controllers are suitable for use in an industrial
environment when installed in accordance with these instructions. Specifically, this
equipment is intended for use in clean, dry environments (Pollution Degree 2
(1)
)
and with circuits not exceeding Over Voltage Category II
(2)
(IEC 60664-1).
(3)
Prevent Electrostatic Discharge
Remove Power
(1) Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that occasionally a
temporary conductivity caused by condensation shall be expected.
(2) Over Voltage Category II is the load level section of the electrical distribution system. At this level transient voltages are
controlled and do not exceed the impulse voltage capability of the product’s insulation.
(3) Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC) designations.
ATTENTION
!
Electrostatic discharge can damage integrated circuits or
semiconductors if you touch bus connector pins. Follow these
guidelines when you handle the module:
· Touch a grounded object to discharge static potential.
· Wear an approved wrist-strap grounding device.
· Do not touch the bus connector or connector pins.
· Do not touch circuit components inside the module.
· If available, use a static-safe work station.
· When not in use, keep the module in its static-shield bag.
ATTENTION
!
Remove power before removing or inserting this module.
When you remove or insert a module with power applied, an
electrical arc may occur. An electrical arc can cause personal
injury or property damage by:
· sending an erroneous signal to your system’s field devices,
causing unintended machine motion
· causing an explosion in a hazardous environment
Electrical arcing causes excessive wear to contacts on both the
module and its mating connector. Worn contacts may create
electrical resistance.