Allen-Bradley 855T-B10YL4 Stack Light is a red-LED signaling module in Rockwell Automation's 855T stack-light family. It operates on 110-120 VAC and draws about 80 mA, delivering clear visual indication for machine status. Designed to be mounted as part of a stack-light assembly on industrial equipment, it provides status signaling as part of a multi-light signaling tower.
