Siemens 3SK1111-1AB30 is a SIRIUS safety relay Basic Unit from the Standard series that provides three normally open (NO) safety switching circuits plus one normally closed (NC) signaling circuit. It is powered from 24 V AC/DC via screw terminals, making it a compact, panel-mounted option for safety circuits. As a 3SK1 basic unit with 3NO and 1NC contacts, this module is intended to monitor safety inputs and drive safety outputs in machines, supporting safe interlock logic and diagnostic signaling in control panels.
