144 Rockwell Automation Publication 1769-UM021G-EN-P - October 2015
Chapter 7 Use I/O Modules with CompactLogix 5370 L1 Controllers
Connect Field Power to I/O Devices Connected to a CompactLogix
5730 L1 Control System
Chapter 1, Connect Power to the Controller (Series B) on page 26, describes
how to connect a dedicated, Class 2/SELV-listed external 24V DC power source
to the VDC+ and VDC- terminals on the removable connector that is shown in
the following graphic. Those connections provide power to only the system-side
of the embedded I/O and local expansion I/O modules.
Power connections to the FP+ and FP- terminals provides power to input and
output devices that are connected to the embedded I/O modules or local
expansion modules of the controller. For example, input or output devices, such
as a barcode scanner.
The embedded I/O of the controller and the field-side power of the local
expansion modules is 24V DC nominally with an input range of 10…28.8V DC.
The following graphic shows the removable connector.
You must connect a separate external power source to the FP+ and FP-
terminals on the removable connector on the controller to power the field-side
circuitry of the embedded I/O modules and the local expansion modules for
only series A L1 controllers. See Appendix
C for further information.
The controller is grounded once it is installed on a DIN rail as described in
Mount the System
on page 21.
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