Allen-Bradley 800T-XA4R Pushbutton Contact Block

Allen-Bradley 800T-XA4R Pushbutton Contact Block is a 30 mm screw-attached accessory for Bulletin 800T/H pushbutton stations, delivering two normally closed (2NC) contacts implemented with Logic Reed technology. The XA4R adds a second, independent NC path to a compatible 30 mm operator, enabling interlock, feedback, or monitoring circuits within compact control panels while preserving the shallow profile of the base button. Designed for use with the 800T family, this block mounts directly to the back of the 30 mm pushbutton assembly and supports standard 30 mm control station layouts, making it a straightforward way to expand wiring options without replacing the main operator. Typical applications include interlock wiring, auxiliary feedback loops, and dual-NC signaling in machine controls and safety circuits, where two NC contacts are required in a compact 30 mm footprint. The 800T-XA4R is characterized as a 2NC Logic Reed contact block with screw attachment, aligning with other XA-series contact blocks in Allen-Bradley’s 800T line for reliable operation in industrial environments.