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Rockwell Automation Publication 1769-UM021G-EN-P - October 2015
Chapter 6
Communicate over Networks
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-SDN scanner can be installed in slot 2 of the local expansion modules, as shown in the following graphic.
Three modules between the power supply and the 1769-SDN scanner.
With this controller catalog number, you can only install one local expansion modules
between the controller and the 1769-SDN scanner.
Table 6 - Example CompactLogix 5370 L2 Control Systems with a 1769-SDN Scanner
Controller Cat. No.
Number of Embedded
I/O Modules
1769-SDN Scanner Power Supply Distance Rating Calculation Impact
IMPORTANT
When counting I/O modules to determine the 1769-SDN scanner 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 in the application of the module.
The physical appearance is 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-SDN scanner is installed in the farthest local expansion module
slot possible, that is the fourth module in the control system, it appears with a
[5] designation in the Controller Organizer, as shown in the following graphic.
1769-SDN scanner is shown as module [5] in this location but considered the fourth module when
counting modules to meet power supply distance rating requirements.
Modules [2] and [3] are shown separately but
are considered one module when counting
modules to meet power supply distance
rating requirements.
