TAC Xenta 421/422 Digital Input/Output Module Technical Data

This document provides technical data, installation, and design specifications for the TAC Xenta 421 and 422 digital input/output modules, which serve as expansion modules for TAC Xenta controllers via a LONWORKS network. It details features such as four digital inputs (usable as pulse counters), five relay outputs, LED status indicators, manual override switches (on model 422), and compliance with EN 50081-1 and EN 50082-1 standards.