ABB SA/S 4.20.1S 4-Fold Switch Actuator Manual

This document details the ABB SA/S 4.20.1S, a 4-fold switch actuator with integrated current detection for the ABB i-bus® EIB/KNX system. It describes technical specifications, including 20 AX rated current, potential-free floating contacts, manual operation, and programmable functions such as time delays, stair light logic, scene recall, and forced control.