Industrial 0-49021-A CardPak Input Output Module

Reliance CardPak 0-49021-A is an industrial input/output module designed for Reliance CardPak control systems. This PC-board CardPak module plugs into a CardPak backplane to extend a controller’s digital I/O capability, and the 0-49021-A designation identifies it within the CardPak I/O family. The part is commonly cataloged and offered as new, surplus, or refurbished by third-party suppliers, reflecting its status as a legacy CardPak component used in repair or replacement scenarios. Market listings and catalog references from retailers such as Santa Clara Systems and other electronics surplus vendors confirm the model as part of the Reliance CardPak lineup, with 0-49021-A specifically cited in multiple parts catalogs. Some sources indicate that the 0-49021-A CardPak module has been discontinued by the manufacturer, which aligns with its presence in repair and surplus marketplaces rather than as a current production item.