Allen-Bradley 1719-A22 Compact IO Rack System

Allen-Bradley 1719-A22 Ex I/O 22-Slot Base Chassis is a rugged, backplane-based rack for the 1719 Ex I/O family, designed to house up to 22 intrinsically safe I/O modules in hazardous-location applications. The base backplane accepts a 18–32 V DC power input and provides the electrical and mechanical framework for a compact Ex I/O system, with extension options that, when paired with the 1719-A24 extension rack, expand total slot count up to 46 I/O positions across multiple sections. This chassis is part of Rockwell Automation’s Ex I/O lineup, structured to support modular 1719 Ex I/O adapters, power supplies, and modules that share the Ex I/O protocol and intrinsic-safety requirements, enabling scalable, enclosure-friendly installations in challenging environments. For proper installation, select compatible 1719 Ex I/O components—such as the terminal blocks and adapters designed for the 18–32 V DC Series A backplane—and follow the documented wiring and safety configurations to maintain certification and safe operation in hazardous areas. The 1719-A22 base chassis thus provides a compact, maintenance-friendly foundation for distributed I/O in industrial settings where intrinsic safety, rigid physical zoning, and reliable power distribution are essential.