Allen-Bradley 855T-B10TL4 LED Stack Light Module

The Allen-Bradley 855T-B10TL4 LED Stack Light Module is a 70 mm control-tower signaling unit from the Bulletin 855T family, delivering a red steady LED indicator for multi-color stack configurations. It uses 120 V AC full-voltage input (Voltage Code 10) and features a black housing with a red lens, designed to be mounted as part of a stack light on automation equipment. As a Steady LED module (TL code) within the 855T control-tower signaling line, it can be combined with other TL or 855T modules to create a multi-color status indicator on equipment such as conveyors, packaging lines, and automated cells. The 70 mm diameter footprint aligns with standard 855T bases and stack configurations, enabling straightforward expansion of signaling capability in existing systems. This part, 855T-B10TL4, corresponds to a red lens color code 4 and voltage code 10, consistent with Rockwell's 855T TL-series documentation and catalog references.