Allen-Bradley 855E-24TL4 Control Stack Light Module

The Allen-Bradley 855E-24TL4 is a 50 mm Control Tower Stack Light module that delivers a red steady LED indication from a 24V AC/DC supply, designed for socket-mount installation as part of a stackable signaling tower. This LED-based light module in the 855E family provides steady illumination with a red lens, enabling continuous status signaling on automation equipment, and it is specified for 24V AC/DC full voltage operation. The unit features a 52 mm base diameter and 67.7 mm overall height, with wiring compatible for 0.5–1.5 mm² conductors and a current draw around 29 mA; the LED lamp offers approximately 31.4 lumens of illumination and a luminous intensity near 2240 mcd for reliable visibility. The housing is black with a red lens, and the module carries an IP65 rating for protection in demanding environments, with an operating temperature range from -25°C to 50°C. Wiring is facilitated by top-mounted terminals designed for tool-free assembly in a socket-mount configuration, and the 855E stack light can be combined with other 855E/856T modules to form multi-position towers up to five high. Typical applications include machine signaling, process automation status indication, and operator alert systems on control panels and production lines.