PSEN ma1.4a-57/PSEN ma1.4-03mm/ 1unit 506325 Magnetic safety switch 2 n/o, 1 auxiliary contact n/o, square design, LED, IP6K9K, operating distance 3 mm, 5 m cable, height design18 mm, for series connection with PSEN ix1, PU = 1 sensor with actuator.