Siemens 3RH2911-2DA11 Auxiliary Switch, Lateral Mount, 1NO + 1NC, Spring-Loaded Terminal for 3RT2.1 Contactors Original Brand New

Overview

The Siemens 3RH2911-2DA11 is a high-quality lateral auxiliary switch designed for reliable signal and control functions in industrial applications. Engineered for seamless integration with Siemens 3RT2.1 contactors, this device offers 1 Normally Open (1NO) and 1 Normally Closed (1NC) current path configuration. Featuring durable spring-loaded terminals, it ensures fast installation, secure wiring, and long-term operational safety in demanding automation environments.

With clearly defined contact assignments—left: 41/42, 53/54; right: 21/22, 33/34—the auxiliary switch provides dependable circuit expansion for monitoring and feedback applications.

Key Benefit

• Reliable Functionality – Provides consistent signaling for complex control systems.

• Easy Installation – Spring-loaded terminals allow quick, tool-friendly wiring.

• Space-Saving Lateral Design – Mounts neatly on the side of Siemens 3RT2.1 contactors.

• Enhanced Safety – Stable contact performance reduces risk of wiring errors or signal faults.

• Versatile Use – Ideal for automation panels, control systems, and industrial machinery.

Functions & Features

• Contact Configuration: 1NO + 1NC

• Mounting Position: Lateral (left and right side contact indications)

• Contact Assignments:

  • Left: 41/42, 53/54

  • Right: 21/22, 33/34

• Terminal Type: Spring-loaded terminal technology

• Compatible With: Siemens 3RT2.1 series contactors

• Designed for control, monitoring, and feedback circuits

• Siemens-grade durability for industrial electrical systems

Application

The Siemens 3RH2911-2DA11 is primarily used for:

• Signaling Contactor Status: Providing NO/NC contacts for indicating the energized or de-energized state of the main contactor to PLCs or indicator lights.

• Interlocking Circuits: Essential for safety circuits, ensuring proper sequential operation or preventing simultaneous activation of opposing components (e.g., motor forward/reverse circuits).

• Control Circuit Expansion: Adding required contacts for complex control logic within automated machinery and systems.

For more of our products, visit turll today!