The SIEMENS 3RH2911-1FA04 is an auxiliary front-mounted switch assembly with four normally closed contacts designed to attach to 3RT2 contactors and 3RH2 contactor relays. It provides four separate current paths (each with one NC contact) and uses screw terminals for straightforward wiring and secure connections. Designed for panel or field service, the module gives clear, repeatable signaling for control circuits and interlocks, helping maintenance and control technicians integrate additional monitoring or safety feedback without changing the main contactor. Compact front mounting keeps installation accessible while maintaining tidy control-panel layouts.
