Allen-Bradley 1771-HSA IMC-120 Servo Controller

Allen-Bradley 1771-HSA IMC-120 Servo Controller is an IMC servo controller module for PLC-5 motion-control systems, handling servo axis control with ADV features. It occupies a backplane slot in a PLC-5 rack and interfaces to a 120–220 VAC power supply via the 1771-CAS connector, powered through the 1771-PS7 cable. It carries a 96 KB lithium battery memory cartridge that stores the controller's application programs and AMP parameters, with the battery offering a typical life of roughly 3 years; the memory cartridge is designed to retain data for up to 10 years. Weighing about 2.0 lb (0.91 kg), the IMC-120 integrates into the PLC-5 Motion Control System to drive servo axes through compatible servo drives, enabling precise positioning and motion profiles in automation tasks. This module is labeled 1771-HSA and is part of Rockwell Automation's IMC-120 family, often used in retrofit or expansion projects where reliable servo control and parameter retention are critical.