14 Rockwell Automation Publication 1746-RM003D-EN-E - May 2019
Chapter 1 Overview
Power Considerations
SLC 500 Controllers
The SLC 500 controllers require an SLC power supply module on the leftmost
slot to provide power to all modules on the chassis. This powers up the controller
and the I/O modules. This also facilitates communication through
the backplane.
Though all 1746 input modules and most 1746 output modules receive the
necessary power that they need from the backplane, some 1746 output modules,
such as relay modules and AC modules, require additional power to be supplied
to the module terminal block.
CompactLogix 5380 Controllers
The CompactLogix 5380 controllers require a 24V DC source supply that is
connected to the MOD power terminal to provide power to all modules. Unlike
the SLC 500 controller, the CompactLogix 5380 controller does not require
achassis.
Backplane connection is at the side of each module and it is necessary to cover the
side with a 5069-ECR end cap (shipped with the CompactLogix 5380
controllers and Compact 5000 EtherNet/IP adapters) to help prevent
electrical hazards.
The 24V DC source to MOD power terminal can be from any external power
supply. You do not require additional power supply connections to each I/O
module
(1)
if connecting field devices are in the same operating voltage range.
For more information about MOD power and SA power considerations, refer to
chapter 2 of the CompactLogix 5380 and Compact GuardLogix 5380
Controllers User Manual, 5069-UM001
.
(1) Except for 5069-OB8, 5069-OB16 and 5069-OB16F.
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