Rockwell Automation Publication 1769-UM021G-EN-P - October 2015
159
Use I/O Modules with CompactLogix 5370 L1 Controllers
Chapter 7
Based on the configuration of your application, you can use one of the
following devices to make more POINTBus backplane current or field
power current available:
– 1734-EP24DC POINT I/O Expansion Power Supply
- An
expansion power supply is installed between embedded I/O modules
and local expansion modules or between local expansion modules.
The expansion power supply breaks the available POINTBus
backplane current between the modules to its left and right. With the
expansion power supply installed, the modules to its left can draw up to
1 A of POINTBus backplane current and the modules to its right can
draw as much current as is provided by the expansion power supply.
Additionally, the expansion power supply breaks the available field
power current between the modules to its left and right. With the
expansion power supply installed, the modules to its left can draw up to
3 A of field power current and the modules to its right can draw as
much field power current as allowed by the expansion power supply.
For example, if you need six 1734-IR2 modules as local expansion
modules for a 1769-L18ER-BB1B controller application, you must
include the 1734-EP24DC expansion power supply in the local
expansion-module installation.
For more information on the 1734-EP24DC expansion power supply,
see the POINT I/O 24V DC Expansion Power Supply Installation
Instructions, publication
.
