Allen-Bradley 856T-B24QD8C Stack Light Mounting Base

Allen-Bradley 856T-B24QD8C is a 70 mm stack-light mounting base designed to anchor and power a multi-module Control Tower signaling stack. This factory-assembled base comes in a black housing and is specified for 24V AC/DC operation. It provides an 8-pin M12 connector as the electrical interface and a rigid M30 mounting thread for secure panel mounting, enabling straightforward integration into 70 mm stack-light assemblies. The base supports up to seven circuits, allowing up to seven stacked light and/or sound modules to be installed on a single 856T base, which can simplify wiring and optimize space in control panels. A cap is included with the mounting base, helping to finish the stack between modules. There is no network option on this base, making it a focused, non-networked signaling solution within Allen-Bradley’s 856T ecosystem. Suitable applications include visual status indication, fault alerts, and process signaling on factory floors, packaging lines, and automation cells where a compact, multi-indicator setup is advantageous.