Siemens 3RH2911-2FC22 Auxiliary Switch Block, Front-Mounted, 2 NO + 2 NC, Spring-Loaded Terminal Original Brand New

Overview

The Siemens 3RH2911-2FC22 is a high-performance, front-mounted auxiliary switch block designed to expand the functionality of Siemens 3RT2 contactors and 3RH2 contactor relays. This essential component provides additional switching points for your control circuits, enabling complex automation and interlocking functions. With its robust design and reliable spring-loaded terminals, it offers a quick and secure connection, reducing installation time and ensuring long-term operational stability.

Key Features & Benefit

• Expanded Control Capabilities: Provides 2 normally open (NO) and 2 normally closed (NC) contacts, allowing you to monitor and control multiple aspects of your circuit from a single contactor.
• Front-Mounted Design: Easily attaches to the front of compatible contactors, saving space in your control cabinet and simplifying wiring.
• Leading and Lagging Contacts:
  • 2 NO (Normally Open) leading contacts: Close before the main contactor contacts, ideal for functions that require pre-operation signals, such as indicating contactor readiness.
  • 2 NC (Normally Closed) lagging contacts: Open after the main contactor contacts, perfect for interlocking functions that prevent simultaneous operation of different components.
• Spring-Loaded Terminals:
  • Fast and tool-free wiring: Simply push the wire into the terminal for a secure connection. This significantly reduces installation time and labor costs.
  • Vibration-proof connection: Maintains a reliable connection even in demanding industrial environments subject to vibration.
  • Maintenance-free: The robust spring mechanism ensures a constant, low-resistance connection over time, eliminating the need for periodic retightening.
• Seamless Compatibility: Specifically engineered to integrate perfectly with Siemens SIRIUS 3RT2 contactors and 3RH2 contactor relays, ensuring a perfect fit and optimal performance.
• Compact and Efficient: Its space-saving design makes it a perfect solution for applications where cabinet space is at a premium.

Function

• Signaling and Status Indication: Use the auxiliary contacts to power indicator lights or send signals to a PLC, providing real-time status of the contactor’s state (e.g., “ON,” “OFF,” “ready”).
• Interlocking: Prevents two or more devices from operating at the same time by using a normally closed (NC) contact from one device to break the control circuit of the other.
• Control Circuit Extension: Adds more switching points to a circuit, enabling more complex control logic and automation sequences.
• Sequential Control: The leading and lagging contacts are crucial for applications requiring timed sequences of operation.

Technical Specification

• Product Type: Auxiliary Switch Block, Front-Mounted
• Number of Contacts: 2 NO (Normally Open) + 2 NC (Normally Closed)
• Terminal Type: Spring-Loaded Terminals
• Current Path:
  • 1 NO (leading)
  • 1 NO (leading)
  • 1 NC (lagging)
  • 1 NC (lagging)
• Compatibility: For Siemens 3RT2 contactors and 3RH2 contactor relays
• Product Number: 3RH2911-2FC22

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