252 Rockwell Automation Publication 1769-UM021G-EN-P - October 2015
Chapter 9 Use I/O Modules with CompactLogix 5370 L3 Controllers
In this case, you must install the 1769-ASCII module and 1769-HSC high-speed
counter module with no more three Compact I/O modules between the module
and the power, regardless of whether the modules are installed to the left or right
of the power supply.
This graphic shows 1769-HSC high-speed counter modules that are installed in
a 1769-L36ERM control system that meet the power supply distance rating of
the module.
1769-HSC High-speed Counter Modules Installed in a 1769-L36ERM Control System
Meeting the Power Supply Distance Rating Requirements of the High-speed Counter
Module
Local Bank
Extra Bank
1769-HSC Module 1769-HSC Module
1769-HSC Module 1769-HSC Module
The previous table shows example systems with 1769-HSC high-speed counter
modules in each control system because it has a power supply distance rating
of four and cannot be installed as far from the Compact I/O power supply. Most
Compact I/O modules have power supply distance ratings that allow you to
install them anywhere in the local expansion slots of a CompactLogix 5370 L2
control system.
For more information about the power supply distance rating for a Compact I/O
module, see CompactLogix Selection Guide, publication 1769-SG001.
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