Allen-Bradley 855T-B10TL4 Stack Light

Allen-Bradley 855T-B10TL4 is a 70 mm control-tower stack light module with a black housing and a red LED lens, designed for Rockwell Automation 70 mm control-tower assemblies. It is a steady LED indicator rated for 120 V AC (±10%) at 60 Hz, with an outer diameter of 70 mm and ingress protection of IP65 (NEMA 4X), making it suitable for demanding industrial environments. The red lens provides persistent visual signaling, and the unit is part of the 855T family of signaling devices designed to be used with compatible bases and mounting hardware to form a compact signaling tower on equipment or panels. The module is manufactured in Austria and carries a one-year standard warranty. Typical applications include visual status indication on manufacturing lines, packaging systems, and automation cells where quick color-coded signaling is needed to communicate machine state or faults. This 855T-B10TL4 variant combines a black housing with a red LED output and is powered from standard 120 VAC control circuits, aligning with common industrial power standards for easy integration into existing control panels.