Allen-Bradley 855E-24TL4 LED Pilot Indicator Light

Allen-Bradley 855E-24TL4 is a 50 mm control-tower stack-light light module that provides a red, steady LED indicator from a 24 V AC/DC supply when installed as a socket-mounted LED in the 855E signaling family. This 24V AC/DC Full Voltage LED module is designed for status signaling in machine controls, with a red lens and steady (non-flashing) illumination. The TL4 designation identifies a steady socket-mount LED module that snaps into compatible 50 mm base assemblies, enabling simple wiring and reliable operation in control towers. Typical applications include signaling machine states such as running, standby, or fault in automation and manufacturing environments, where clear visual feedback is needed. The product is documented by Rockwell Automation as Light Module 50 mm Stack Light, 24V AC/DC Full Voltage, Red Steady LED (socket mount) and is part of the 855E line, featuring a 50 mm size and red lens color.