The SIEMENS auxiliary contact block 3RH2911-2HA31 ist a component of the SIRIUS 3RH series, designed for use with contactors of size S00 to S0. It expands the functionality of the contactors with additional switching contacts for control and signaling tasks. The configuration includes three normally open (NO) contacts and one normally closed (NC) contact, allowing for flexible wiring options in complex switching systems. Thanks to the quick and easy connection via screw terminals, a swift installation in the control cabinet ist ensured. This block ist ideal for integration into control circuits of motor protection switches and contactors in industrial automation and control systems. It enables the monitoring and control of machines and systems. Reliable switching performance for your application.