Installation Instructions User Manual

Rockwell Automation Publication 1756-IN005C-EN-P - March 2014 21
Install Chassis and Power Supplies Chapter 1
Install the Chassis and Power
Supply
After planning your system, use these instructions to properly install the standard
or ControlLogix-XT versions of your 1756 chassis and power supplies.
1. Drill holes in the back panel of the enclosure for the chassis mounting tabs.
See the Plan the System on page 15 for assistance in hole placement.
2. Scrape paint off the back panel for an electrical connection between the
chassis and back panel.
3. Hold the chassis in place against the holes.
4. Install the hardware for the top mounting tabs and tighten.
See Parts Required
on page 13 for more information.
ATTENTION: Do not drill holes above an installed chassis. Metal chips from
drilling can damage the backplane and cause intermittent operation.
IMPORTANT
Chassis are intended to be mounted only horizontally. Do not mount vertically.
ATTENTION: If the chassis mounting tabs do not lay flat before the screws are
tightened, use additional washers as shims so the chassis is not warped by
tightening the screws.
Warping a chassis can damage the backplane and cause intermittent operation.
20289-M