Siemens 3RH2911-2GA40 Auxiliary Switch Block, 4 NO, Spring Terminal Original Brand New

Overview

The Siemens SIRIUS 3RH2911-2GA40 Auxiliary Switch Block is a high-performance front-mounted auxiliary switch for the SIRIUS 3RH2 series contactor relays. Engineered for reliable signal multiplication and switching in control circuits, this unit features 4 Normally Open (NO) instantaneous auxiliary contacts with terminal designations 53/54, 63/64, 73/74, and 83/84 (according to EN 50011). It is specifically designed for use with Siemens 3RH2140 and 3RH2440 contactor relays (Size S00), offering seamless and robust integration.

Key Benefits & Advantages

• Rapid & Secure Connection: Utilizes advanced spring-loaded terminal technology for fast, vibration-proof, and maintenance-free wiring, reducing installation time and costs.
• High Reliability: Ensures high contact stability, making it suitable for solid-state circuits with low voltages and currents (e.g., $\ge 1\text{ mA}$ at $\ge 17\text{ V}$).
• Safety Integrated: The conventional front auxiliary contacts feature force-guided operation, which is essential and suitable for safety-related applications.
• Easy Integration: Simple, tool-less snap-on mounting directly onto the front of compatible SIRIUS 3RH2 contactor relays (Size S00).
• Standard Compliance: Meets international standards including EN 50011 and is physically coded for correct installation.

Function & Technical Detail

The 3RH2911-2GA40 serves to expand the number of auxiliary contacts available on compatible contactor relays, enabling the simultaneous switching and signaling of multiple auxiliary circuits.

• Product Type: Auxiliary Switch Block (Front Mount)
• Contacts: 4 NO (Normally Open) Instantaneous Contacts
• Terminal Type: Spring-Loaded Terminals (Spring-Type Terminal/Cage Clamp)
• Compatibility: Only for Contactor Relays 3RH2140 and 3RH2440 (SIRIUS Size S00)
• Rated Operational Current (Ie​) at AC-15, 230 V: 6 A (typical)
• Positively Driven Operation: Yes (Suitable for safety applications)
• Coding: Physically coded for error-free mounting.

Application

Ideal for use in control cabinets and industrial automation for:

• Signal multiplication in control circuits.
• Switching auxiliary circuits in motor control and system management.
• Integration into complex control systems, including those involving PLCs.

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