Allen-Bradley 800MR-JX9B 3 Position Round Selector Switch

Allen-Bradley 800MR-JX9B is a compact, round three-position selector switch from Rockwell Automation’s 800MR family, engineered for panel-mount installation in industrial control environments. The JX9B variant denotes a non-illuminated, three-position switch built around a B cam code, designed to provide a simple, robust operator interface where three discrete settings are required. This model is commonly supplied without a knob and can be paired with a matching contact cartridge and mounting hardware; some sub-variants offer knob or keying options. In regular use, you rotate the actuator to select among three positions to route signals or choose operating modes, making it suitable for start/stop, mode selection, or process control in panels, machines, conveyors, and other automation equipment. As part of the 800MR line, it emphasizes durable mechanical switching and compatibility with standard 800MR accessories for reliable, long-life operation in harsh industrial environments.