Allen-Bradley 855T-BSB Light Fixture

The Allen-Bradley 855T-BSB is a vertical-mount base for Rockwell Automation’s 855T Control Tower Stack Light family, designed to attach a stack-light head to a panel or surface. This base listing specifies a Cap option (With Cap) and is intended for use with 855T signaling heads in control-tower installations, providing the essential mounting interface for visible process status indicators. As part of Allen-Bradley signaling components, the 855T-BSB is commonly used in machine controls, assembly lines, and process automation to create compact signaling towers on equipment enclosures. It represents one of several mounting base configurations in the 855T family, enabling panel-mounted installations with a robust, industry-standard interface. The base is manufactured by Allen-Bradley (Rockwell Automation) and is typically paired with compatible 855T heads to deliver multi-point signaling across one or more colors. In practice, technicians select the 855T-BSB to convert a head into a surface- or panel-mounted tower suitable for industrial environments where clear machine status indication is required. For exact head compatibility, cap options, and mounting details, refer to Rockwell’s official 855T product literature and signaling catalogs.