Siemens 3RH2911-2HA11 Auxiliary Switch: 1 NO + 1 NC, Front Mount, Spring-Loaded Terminals Original Brand New

Overview

The Siemens 3RH2911-2HA11 is a high-quality, front-mounted auxiliary switch designed to expand the functionality of Siemens 3RT2 contactors and 3RH2 contactor relays. This compact and reliable switch module features a 1 Normally Open (NO) and 1 Normally Closed (NC) contact configuration, providing essential signaling and control capabilities for various industrial applications. Its innovative spring-loaded terminals ensure fast, secure, and vibration-resistant connections, significantly reducing installation time and maintenance efforts.

Benefit

• Enhanced Functionality: Adds critical control and signaling paths (1 NO + 1 NC) to your contactor system.
• Time-Saving Installation: The state-of-the-art spring-loaded terminals enable quick, tool-free wiring, saving valuable time on the factory floor.
• Robust & Reliable: Built with Siemens’ renowned quality, this auxiliary switch ensures long-term operational reliability and performance in demanding environments.
• Space-Efficient Design: Front-mount design allows for easy integration without increasing the overall footprint of the contactor.
• Vibration-Proof Connections: Spring-loaded technology provides a consistent, high-pressure connection that is resistant to loosening from vibrations, ensuring continuous operation.
• Seamless Compatibility: Specifically engineered to integrate perfectly with Siemens 3RT2 and 3RH2 series, guaranteeing optimal performance and a perfect fit.

Function

The Siemens 3RH2911-2HA11 auxiliary switch functions by mechanically linking its contacts to the main contactor’s movement. When the main contactor’s coil is energized, the 3RH2911-2HA11’s contacts change state simultaneously. The Normally Open (NO) contact (terminals .3/.4) will close, and the Normally Closed (NC) contact (terminals .1/.2) will open. This action is used for various control circuit functions, such as:

• Feedback and Status Indication: Signaling the status (open or closed) of the main contactor to a PLC or control system.
• Interlocking: Creating safety interlocks in machinery to prevent simultaneous operation of conflicting functions.
• Cascading Control: Activating or deactivating other components in a sequence based on the main contactor’s state.

Technical Specification

• Product Type: Auxiliary Switch
• Mounting Position: On the front
• Contact Configuration: 1 Normally Open (NO) + 1 Normally Closed (NC)
• Current Path: 1 NC, 1 NO
• Terminals: Spring-loaded terminals
• Compatibility: For use with Siemens 3RT2 contactors and 3RH2 contactor relays
• Connections: .1/.2 (NC), .3/.4 (NO)

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