Siemens AG 3RH2911-1FA40 Auxiliary Switch Block

Siemens AG 3RH2911-1FA40 auxiliary switch block adds four front-mounted normally open contacts to compatible 3RT2 contactors and 3RH2 relays, enabling direct signaling and interlock wiring on the device. Each contact is NO and wired through screw-terminal connections, with individual current paths for easy wiring. Designed as a front-mount accessory for Siemens control hardware, it provides four NO contacts in a compact block and a typical electrical endurance of 200,000 operating cycles at AC-15 and 230 V. This auxiliary switch block is intended for use with 3RT2 contactors and 3RH2 relays, facilitating inline sensing and control connections on Siemens automation assemblies.