Rockwell Automation Publication 1769-UM021I-EN-P - May 2018 315
Appendix C
Connect Power to the Series A
CompactLogix 5370 L1 Controllers
This appendix explains how to connect power to the series A L1
CompactLogix™ 5370 controllers.
CompactLogix 5370 L1,
Series A, Controller Power
Connection
The external power supply must be dedicated to the embedded supply of the
controller. The external power supply converts 115/230V AC power to 24V
DC or other application-required DC voltage that is within the operating
range of the controller.
Topic Page
CompactLogix 5370 L1, Series A, Controller Power Connection 315
CompactLogix 5370 L1, Series A, Controller Field Power to I/O Devices Connection 320
IMPORTANT This section describes how to power the controller via the VDC+ and VDC-
terminals.
Connections to the VDC+ and VDC- terminals do not provide power to input
or output devices that are connected to the embedded I/O modules of the
controller or local expansion modules. You must connect power to the FP+
and FP- terminals to provide power to I/O devices that are connected to the
embedded I/O modules of the controller or local expansion modules.
For more information on how to provide power to input or output devices
that are connected to the embedded I/O modules of the controller and local
expansion modules, see page 320
.
WARNING: Do not connect directly to line voltage. Line voltage must be
supplied by a suitable, approved isolating transformer or power supply
having short circuit capacity not exceeding 100VA maximum or equivalent.
The controller power requirement is 50VA.
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