Allen-Bradley 1734-MB IO Module

The Allen-Bradley 1734-MB Point I/O mounting base is the foundational component of the 1734 POINT I/O two‑piece terminal base, designed to accept a removable terminal block (RTB) and to mount 1734 POINT I/O modules to the backplane of a Rockwell Automation control system. Used together with the 1734-RTB and the 1734-TB or 1734-TBS terminal-base variants, the 1734-MB provides the mechanical and electrical interface that enables modular expansion of digital, analog, and specialty I/O within a POINT I/O system. The base itself contains no active electronics, but it incorporates a locking mechanism to help prevent incorrect module placement and to ensure reliable interlock and alignment when the RTB is attached and the full I/O assembly is engaged. This mounting base is the standard foundation for POINT I/O assemblies and is designed to work as part of the broader 1734 family used with compatible Rockwell controllers, including CompactLogix and ControlLogix platforms. In practice, it streamlines field wiring by enabling pre-wired RTBs to be snapped into the base, then mounted as a single, serviceable block of I/O. The 1734-MB variant is commonly sold as the mounting base portion of the 1734-TB/TBS two-piece terminal base (with 1734-RTB), and is available in revisions such as 1734-MB/A for common manufacturing and retrofitting scenarios.