Allen-Bradley 855BS-ABS Programmable Logic Controller Module

Allen-Bradley 855BS-ABS is the 90 mm surface-mount base used with Allen-Bradley 90 mm round beacons in the Bulletin 855 signaling family to form configured beacon assemblies. This replacement base provides the mounting foundation for 90 mm beacon configurations (855BS-ABS, 855BM-ABS, and 855BL-ABS) intended for surface installation on a flat panel or machine enclosure. It is designed for outdoor use only when paired with a rough wall plate to achieve UL Type 4/4X/13 protection; without the wall plate, the installation is UL Type 1. As part of Rockwell Automation’s 855 signaling accessories, the 855BS-ABS ensures compatibility with the corresponding 90 mm beacons and their mounting hardware, enabling consistent mounting geometry and electrical interface across the 90 mm beacon family.