26 Rockwell Automation Publication 1769-UM021G-EN-P - October 2015
Chapter 1 Install the CompactLogix 5370 L1 Controller
Connect Power to the Controller (Series B)
For information to connect power to a series A L1 controller, see Appendix C.
WARNING: When you connect or disconnect the RTB with field-side power
applied, an electrical arc can occur. This can cause an explosion in hazardous
location installations.
Be sure that power is removed or the area is nonhazardous before proceeding.
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. Power must be connected to the FP+
and FP- terminals to provide power to input or output devices that are
connected to the embedded I/O modules of the controller or local expansion
modules.
The external power supply can be used to power both the VDC+/- and FP+/-
terminals on the series B L1 controller, see page 144
.
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 144
.
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 30VA.
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