Allen-Bradley 855T-LL24B LED Lamp Socket Blue

Allen-Bradley 855T-LL24B Blue LED Lamp Socket is a socket-mount indicator lamp designed for Allen‑Bradley 70 mm control tower stacks. This blue LED lamp operates from 24V AC/DC and is intended for use with socket-mounted 855T series tower modules, providing a distinct blue light in industrial signaling towers. As a component of the 855T family, it serves as the blue signaling element in stack-light configurations, replacing incandescent options where LEDs are specified for 24V signaling circuits. The LED construction offers a durable, low-maintenance lighting solution for harsh manufacturing environments commonly found on production lines, packaging lines, and process-control applications. Verified distributor listings describe the 855T-LL24B as a blue LED lamp for socket-mounted modules with 24V AC/DC operation, aligning with Rockwell’s signaling architecture for 70 mm control towers. Typical applications include status indication on automated machinery and lines where a clear blue signal is used to convey specific operational states within an industrial signaling system.