Rockwell Automation Publication 1769-UM021I-EN-P - May 2018 319
Connect Power to the Series A CompactLogix 5370 L1 Controllers Appendix C
6. Connect the wire that is connected to the 24V DC- terminal on the
external 24V DC power source to the VDC- terminal. The VDC-
terminal is second from the top on the removable connector.
7. Plug the removable connector back into the controller.
8. Secure the removable connector in place.
9. Turn on power to the external 24V DC power source.
IMPORTANT If your application requires a power control device, for example, a switch or
relay, between the external 24V DC power source and the CompactLogix
5370 L1 controller to control when the controller is powered, you must
install the power control device at the VDC+ terminal on the removable
connector.
If you install the power control device at the VDC- terminal, the
CompactLogix 5370 L1 controller can have problems powering up or
powering down properly.
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