Siemens 3RH2911-1NL22-0MC0 Auxiliary Switch Front Mount, 2 NO + 2 NC, Solid-State Compatible Original Brand New

Overview

The Siemens 3RH2911-1NL22-0MC0 is a highly versatile and essential auxiliary switch designed to expand the functionality of your Siemens 3RT series contactors. This front-mounted switch is engineered for seamless integration, providing reliable control and monitoring capabilities in a wide range of industrial applications. With its 2 normally open (NO) and 2 normally closed (NC) contacts, it offers flexibility for complex control circuits.

A key feature of this model is its solid-state compatibility. The dedicated solid-state compatible NO contact ensures reliable switching with low-power circuits, making it ideal for interfacing with modern PLCs and other sensitive electronic components. The screw terminals provide a secure and straightforward connection, simplifying installation and maintenance.

Key Features & Benefit

• Expanded Control: Adds 2 NO and 2 NC auxiliary contacts to your contactor, allowing for more complex control and signaling circuits.
• Solid-State Compatible: One dedicated NO contact is designed for reliable switching of low-current, solid-state circuits, protecting sensitive electronics.
• Easy Installation: Front-mounted design with included adapters for specific 3RT102 and 3RT103 contactors ensures a quick and secure fit.
• Reliable Performance: Built with high-quality materials and Siemens engineering standards for long-lasting performance in demanding industrial environments.
• Secure Connections: The robust screw terminals ensure a tight and dependable electrical connection, reducing the risk of downtime.
• Wide Application: Suitable for use in motor control, automation systems, power distribution, and various other industrial machinery.

Functionality

The Siemens 3RH2911-1NL22-0MC0 auxiliary switch operates by physically engaging with the main contactor. When the contactor coil is energized, the auxiliary switch’s contacts change state (NO contacts close, NC contacts open), providing a signal or control path to other components in the system.

• Current Path Configuration:
  • 13/14: 1 NO (Solid-state compatible)
  • 21/22: 1 NC
  • 31/32: 1 NC
  • 43/44: 1 NO
• Compatibility: This switch is designed for specific use with Siemens 3RT102 and 3RT103 contactors. It requires the use of the following adapters:
  • For 3RT102..-.X…-0LA(0.2): Adapter 3RT2926-4NA00
  • For 3RT103..-.X…-0LA(0.2): Adapter 3RT2936-4NA00

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