Allen-Bradley 855T-B24TL4 LED Indicator Light

The Allen-Bradley 855T-B24TL4 is a 70 mm control tower stack light module that provides a red, steady LED indicator and is designed as a replacement lamp module for Bulletin 855T tower light assemblies, enabling a single, readily visible status signal on control panels, machines, or conveyors. Specifically rated for 24 V AC/DC operation (full voltage), the unit uses a red steady LED within a black housing and is intended for socket-mount installation on compatible 70 mm tower bases used in 855T signaling stacks. Within the 855T family, the TL designation denotes a steady LED light; this red LED module is a dedicated signaling element designed for use with 855T tower light assemblies. Common applications include signaling machine status on production lines, conveyors, and automated equipment, where a persistent red indicator provides a quick, unambiguous cue to operators and maintenance staff about a specific condition in the automation system.