Rockwell Automation Publication 1769-UM021G-EN-P - October 2015
223
Use I/O Modules with CompactLogix 5370 L2 Controllers
Chapter 8
For more information about the power supply distance rating for a Compact I/O
module, see CompactLogix Selection Guide, publication
1769-L24ER-QBFC1B
1769-L27ERM-QBFC1B
2
The embedded I/O modules are the first two modules in the module count. At its maximum power supply distance rating,
the 1769-HSC high-speed counter module can be installed in slot 2 of the local expansion modules, as shown in the
following graphic.
Table 25 - Example CompactLogix 5370 L2 Control Systems with a 1769-HSC High-speed Counter Module
Controller Cat. No.
Number of Embedded
I/O Modules
1769-HSC High-speed Counter Module Power Supply Distance Rating Calculation Impact
Three modules between the power supply and the 1769-HSC high-speed counter module.
With this controller catalog number, you can only install one local expansion modules
between the controller and the 1769-HSC high-speed counter.
1769-HSC High-speed
Module
IMPORTANT
When counting I/O modules to determine the 1769-HSC high-speed counter
module placement in a 1769-L24ER-QBFC1B or 1769-L27ERM-QBFC1B control
system, the embedded I/O module appearance is different between the
physical appearance and the appearance of the module in the application.
The physical appearance is a shown in the previous graphic. The second
module is two rows of termination points below one set of status indicators.
In the application, the second embedded I/O module appears as two modules
in the Controller Organizer each with their own slot number, that is [2] and [3].
When the 1769-HSC high-speed counter module is installed in the farthest
local expansion module slot possible, that is the fourth module in the system,
it appears with a [5] designation in the Controller Organizer, as shown in the
following graphic.
Modules [2] and [3] are
shown separately but are
considered one module
when counting modules
to meet power supply
distance rating
requirements.
1769-HSC high-speed counter module is shown as module [5] in this location but considered the
fourth module when counting modules to meet power supply distance rating requirements.
