Rockwell Automation Publication 1769-UM021G-EN-P - October 2015 317
Connect Power to the Series A L1 CompactLogix 5370 Controllers Appendix C
• Use a power source that most effectively meets your application needs.
That is, calculate The power requirements for your application before
choosing a power source to avoid using a power source that far exceeds
your application requirements.
• This section assumes that any DIN rail you use has been grounded
following Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1
.
• The embedded power supply of the CompactLogix 5370 L1 controller
provides power to the controller and POINTBusâ„¢ backplane. It does not
provide field-side power to the embedded I/O or local expansion modules.
• Not all Class 2/SELV-listed power supplies are certified for use in all
applications, for example, use in nonhazardous and hazardous
environments.
Before installing an external power supply, consult all specification and
certification information to verify that you are using an acceptable external
power supply.
• Only for example purposes, this section describes how to use a 1606-
XLE120E, NEC Class 2 switched-mode power supply. The exact steps for
other external power supplies can vary from the steps that are described
here.
Complete these steps to connect power to the CompactLogix 5370 L1 controller.
Series B L1 CompactLogix 5370 controllers can also be connected to power as
instructed in this procedure.
1. Verify that the external 24V DC power source is not powered.
2. Mount the external 24V DC power source on a DIN rail.
The external 24V DC power source can be installed on the same DIN rail
as the controller or a separate DIN rail.
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