Allen-Bradley micrologix 1500 - Programming

Publication 1762-RM001C-EN-P
I/O Configuration 1-3
MicroLogix 1200
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
MicroLogix 1200 expansion I/O (Bulletin 1762) is used to provide discrete
and analog inputs and outputs and, in the future, specialty modules. For
the MicroLogix 1200, you can attach up to six additional I/O modules.
The number of 1762 I/O modules that can be attached to the MicroLogix
1200 is dependent on the amount of power required by the I/O modules.
See your MicroLogix 1200 User Manual, publication 1762-UM001A-US-P
for more information on valid configurations.
Addressing Expansion I/O Slots
The figure below shows the addressing for the MicroLogix 1200 and its
I/O.
The expansion I/O is addressed as slots 1 through 6 (the controller’s
embedded I/O is addressed as slot 0). Modules are counted from left to
right as shown below.
NOTE
Visit the MicroLogix web site (http://www.ab.com/
micrologix.) for the MicroLogix 1200 Expansion I/O
System Qualifier.
NOTE
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 1-13 for complete
information on address formats.
Expansion I/O
Embedded I/O = Slot 0
Slot 1 Slot 2