Allen-Bradley 855T-BPM40C Stack Light Pole Mount Base and Cap

Allen-Bradley 855T-BPM40C is a mounting base and cap assembly for 70 mm‑base 855T control tower stack lights that installs a 855T housing onto a 40 cm (PM40) pole. The unit combines a 70 mm base with a 40 cm aluminum pole mount and arrives with a black housing and cap, providing a finished appearance and a single‑piece installation for reliable signaling in industrial environments. The part number 855T-BPM40C carries the UPC 662468933605 and is documented as a discontinued Rockwell Automation product as of October 1, 2019, with a functional replacement recommended for new designs. This base is intended for legacy setups where a 40 cm pole height is required and pairs with other 855T stack-light bases to create a compact signaling column. The 855T family is used in control towers, indicator stacks, and process lines to convey multi‑color status information across manufacturing floors, with the PM40 configuration providing a 40 cm pole height for improved visibility in typical installation heights.