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Rockwell Automation Publication 1769-UM021G-EN-P - October 2015
Chapter 7
Use I/O Modules with CompactLogix 5370 L1 Controllers
Local Expansion Modules
CompactLogix 5370 L1 controllers support the use of 1734 POINT I/O™
modules as local expansion modules along the POINTBus backplane.
Consider the following when using local expansion modules:
•
The controllers support this many local expansion modules.
•
You can use up to the maximum number of 1734 POINT I/O modules
with the CompactLogix 5370 L1 controllers that are listed in
long as the total current drawn by the embedded I/O and local expansion
modules does not exceed the available POINTBus backplane current of 1
A and field power current of 3 A.
IMPORTANT
For a full description of how to use 1734 POINT I/O modules, see the POINT I/O
Digital and Analog Modules and POINTBlock I/O Modules, publication
Table 7 - Maximum 1734 POINT I/O Modules Available as Local Expansion Modules
Cat. No.
Local 1734 POINT I/O Modules Supported, max
1769-L16ER-BB1B
6
1769-L18ER-BB1B
8
1769-L18ERM-BB1B
1769-L19ER-BB1B
IMPORTANT
Do not put more than three of the 1734-IT2I or 1734-IR2 modules on
the POINT I/O bus that draws power from the same power source. This
includes power sources such as from communication adapters or the
1734-EPAC or 1734-EP24DC expansion power supply modules. The
inrush current exceeds the current limit of the DC to DC converter in the
power source.
