Allen-Bradley 1769-ARM Analog Input Module

The Allen-Bradley 1769-ARM is an Address Reserve Module for 1769 Compact I/O systems. This compact accessory has no analog or digital I/O channels; its sole function is to reserve a specific I/O slot address on the 1769 Compact I/O backplane. By occupying a slot without providing measurement or control signals, the 1769-ARM preserves the intended addressing map in your PLC program, simplifying future expansion or module replacement in a 1769 rack. Installed in the same way as other 1769 modules, it uses the standard backplane interface and mounting and does not require wiring to sensors or actuators. Typical use cases include planning for future analog or digital I/O modules, preventing address gaps, and enabling smooth hot-swap operations during maintenance or expansion in Rockwell Automation environments. The 1769-ARM is part of the Compact I/O family and is designed to work with 1769 backplanes and compatible controllers within Rockwell Automation ecosystems.