Allen-Bradley 1715-A2A Redundant I/O Adapter Base is a two-slot base unit in the Rockwell 1715 Redundant I/O system that provides the mounting and interconnect framework for two I/O adapters. It is designed for use with two 1715-AENTR Ethernet/IP adapters and mounts to a 1715-A3I0 I/O base to form a redundant I/O rack for critical process applications. The system is powered from 18 to 32 V DC (nominal 24 VDC) as part of the 1715 Redundant I/O requirements. It provides a single I/O bus and supports up to eight 1715-A3IO base units and up to 24 I/O modules, enabling scalable configurations for industrial automation.
