Allen-Bradley 801-CMC21 is a general‑purpose limit switch with a fork‑lever actuator, snap‑action contacts, and maintained operation, housed in Rockwell’s Type 9 housing for rugged machine environments. It uses a 1NO/3NC (Arrangement C) contact set, with a sensor length of 152.4 mm (6.0 in) and a nominal travel to operate of 20.6 mm (0.81 in). Rated up to 600 V AC/DC, it is specified for ambient temperatures from 0 to 40 °C and an operating force of 15.58 N. Typical applications include end‑of‑travel sensing on conveyors, presses, and other automation equipment requiring reliable, positive‑action switching.
