Allen-Bradley 800MS-XO16 Pushbutton

Allen-Bradley 800MS-XO16 Pushbutton is a 22.5 mm operator from Rockwell Automation’s 800MS family, designed for panel mounting in industrial control enclosures. The gray bezel variant (XO16) is intended to be used with an external contact block, as the body is specified with “Contact None,” meaning the electrical contacts are supplied separately. The XO16 designation identifies the 120 VAC version within the 800MS line, with a black-bezel counterpart labeled 800MB-XO16 offered in the same family. This pushbutton is documented as a 120 VAC unit, aligning with common control-system practice to run on standard mains; other 800MS variants cover 6, 12, and 24 VAC/DC configurations to accommodate different wiring schemes. In operation, this pushbutton acts as an actuator to initiate, stop, or change modes on machinery, conveyors, and process equipment when paired with an appropriate 22 mm contact block and wiring harness. The 800MS family provides modular compatibility by allowing users to select the contact block and termination method for the control circuit.