Publication 1766-RM001A-EN-P - October 2008
I/O Configuration 17
MicroLogix 1400
Expansion I/O
If the application requires more I/O than the controller provides, you can
attach I/O modules. These additional modules are called expansion I/O.
Expansion I/O Modules
For the MicroLogix 1400, Bulletin 1762 expansion I/O is used to provide
discrete and analog inputs and outputs and, in the future, specialty
modules. You can attach up to seven expansion I/O modules in any
combination.
Addressing Expansion I/O Slots
The figure below shows the addressing for the MicroLogix 1400 and its
I/O.
The expansion I/O is addressed as slots 1…7 (the controller’s embedded
I/O is addressed as slot 0). Modules are counted from left to right as
shown below.
TIP
In most cases, you can use the following address format:
X:s/b (X = file type letter, s = slot number, b = bit number)
See I/O Addressing on page 27 for complete information on address
formats.
Expansion I/OEmbedded I/O = Slot 0
44563
Slot 1
Slot 2
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