Siemens 549-210 Digital Point Expansion Module

The Siemens 549-210 Digital Point Expansion Module is a digital I/O expansion accessory for Siemens Apogee Automation 549 controllers, designed to increase the number of digital input and output points available in a 549-based automation system. Alternate identifiers for this module include 549210 and AG-8256. By adding digital I/O capacity to the existing controller, it supports more sensors, actuators, and status signals in a single installation without replacing the main processor, enabling scalability in discrete control applications. This expansion module is used within Apogee Automation 549 environments to extend the controller's digital I/O capacity, helping to manage larger or more complex automation tasks across equipment and process lines that rely on Siemens 549 family hardware. Typical configurations combine this module with other 549-series digital expansion devices to tailor I/O to specific machine layouts and control strategies.