Siemens 3RH1911-2NM22-0MC0 Auxiliary Switch, Front Mount, Solid-State Compatible, Spring-Loaded Terminal Original Brand New

Overview

The Siemens 3RH1911-2NM22-0MC0 is a high-performance, front-mounting auxiliary switch block designed for use with specific SIRIUS contactors, primarily the 3RT101 series. It expands the control and signaling capabilities of the main contactor, featuring a total of 4 auxiliary contacts: 2 Normally Open (NO) and 2 Normally Closed (NC).

This unit is distinguished by its solid-state compatibility on one of the NO contacts, making it ideal for interfacing with modern electronic control systems like PLCs. The use of spring-loaded terminals ensures fast, reliable, and vibration-proof wiring without the need for specialized tools.

Key Features and Specification

• Configuration: 2 NO + 2 NC (4-pole)
• Mounting: Front-mounting on the main contactor (e.g., 3RT101..-..K…-0LA0)
• Terminal Designation:
  • NO Contacts: 53/54, 63/64
  • NC Contacts: 71/72, 81/82
• Current Path Breakdown (as per product description):
  • 1 NO (Solid-State Compatible)
  • 1 NO
  • 1 NC
  • 1 NC
• Connection Type: Spring-loaded terminals (for quick, secure, and maintenance-free wiring)
• Compatibility: Optimized for Siemens SIRIUS 3RT101 power contactors with specific control supply versions (e.g., 3RT101..-..K…-0LA0).
• Solid-State Compatible Contact: Essential for low-power signaling to electronic devices (PLCs, microcontrollers), ensuring reliable contact at low voltages and currents.

Benefit

• Enhanced Control Functionality: Adds four reliable auxiliary contacts (2 NO, 2 NC) to your contactor for complex control, interlocking, and signaling tasks.
• PLC/Electronic Integration: The solid-state compatible contact guarantees reliable switching even at low currents, making it perfect for connecting to Programmable Logic Controllers (PLCs) and other digital inputs.
• Fast and Secure Wiring: Spring-loaded terminals dramatically reduce wiring time and maintenance by providing a gas-tight, vibration-proof connection without the need for re-tightening.
• Space-Saving Design: Front-mounting configuration saves panel space compared to side-mounting blocks.
• Reliable Siemens Quality: Part of the trusted SIRIUS industrial controls portfolio, ensuring long mechanical and electrical service life.

Function

The 3RH1911-2NM22-0MC0 serves as an expansion module to a primary contactor (like a 3RT101). When the primary contactor coil is energized (or de-energized), the auxiliary contacts mechanically switch state simultaneously. This action provides:

1. Status Feedback: Signaling the ON/OFF state of the main contactor to a control system or indicator light.
2. Interlocking: Creating logic for safety functions (e.g., ensuring two motors cannot be started at the same time).
3. Self-Holding Circuits: Implementing simple ON/OFF control logic.
4. Low-Level Signaling: The solid-state compatible contact provides an accurate signal for sensitive electronic inputs.

For more information on the Siemens 3RH1911-2NM22-0MC0 and a wide range of industrial control products, visit turll today!