Allen-Bradley 855T-B10FN6 Flashing Stack Light

Allen-Bradley 855T-B10FN6 Flashing Stack Light is a 70 mm control-tower indicator with a black housing and blue lens, configured with a flashing incandescent light module (FN) and designed for 120V AC operation (voltage code 10). As part of the Bulletin 855E/855T Control Tower Stack Lights family, this model combines a blue lens with a flashing signal to draw attention to machine states in industrial environments. The unit uses a standard 70 mm base for easy integration in control-panel stacks and is rated for 120V AC supply; the “FN” code specifically denotes a flashing incandescent module, not a steady LED or strobe. With a blue indicator, it serves as a distinct status cue among other colors used in stacked signaling systems. Typical applications include signaling running, standby, or fault conditions on automated conveyors, assembly lines, and process equipment in manufacturing facilities that employ Allen-Bradley control architectures.