Siemens SIRIUS 3RH2911-2FB11 Front Auxiliary Switch, Spring-Loaded Terminal Original Brand New

Overview: Siemens 3RH2911-2FB11 Auxiliary Switch for SIRIUS Contactors

The Siemens 3RH2911-2FB11 is a high-quality, front-mounted auxiliary switch block designed specifically for seamless integration with SIRIUS 3RT2 Power Contactors and 3RH2 Contactor Relays. This essential accessory expands the contact capability of your main device, featuring a 1 NO (Normally Open) and 1 NC (Normally Closed) contact configuration. Its innovative spring-loaded terminal connections ensure fast, vibration-proof wiring and reliable performance in industrial control applications.

Key Functions

• Contact Expansion: Adds two dedicated auxiliary contacts (1 NO + 1 NC) to the associated contactor or contactor relay.
• Signaling and Interlocking: Used for electrical interlocking circuits, status indication (e.g., in PLC inputs), and controlling low-current circuits, reliably signaling the main contactor's state.
• Front Mounting: Easily snaps onto the front of compatible devices, simplifying installation and wiring accessibility.

Benefit

• Reliable Signaling: Features a positively driven 1 NO (leading) and 1 NC (lagging) contact path, suitable for safety-relevant applications, ensuring both contacts will not be closed simultaneously.
• Fast, Secure Wiring: Utilizes spring-loaded terminals, providing a tool-free, robust, and permanent connection that is highly resistant to vibration, saving installation time.
• High Compatibility: Fully compatible with a wide range of Siemens SIRIUS products, specifically the 3RT2 Contactors and 3RH2 Contactor Relays across sizes S00, S0, and S2.
• Space Saving: Front mounting minimizes the need for side-mounted accessories, optimizing control panel space.

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