250 Rockwell Automation Publication 1769-UM021I-EN-P - May 2018
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. This requirement is true 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
IMPORTANT Table 31 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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