Siemens 3RH1911-2FA40 SIRIUS Auxiliary Switch Block, 4 NO Front Mount, Spring Terminal Original Brand New

Overview

The Siemens 3RH1911-2FA40 is a high-quality, front-mounted auxiliary switch block from the robust SIRIUS industrial control range, specifically designed to expand the auxiliary contacts of auxiliary and motor contactors. This essential accessory is engineered for reliable signal and control circuit functions in automation and electrical systems.

It features 4 Normally Open (NO) instantaneous contacts and utilizes fast, vibration-proof spring-loaded terminals for quick and reliable wiring, making it an efficient choice for industrial applications. It is suitable for use with the S00 size contactors, such as the 3RT101..-.K…-0LA0 series, ensuring seamless integration and performance.

Key Features

• Configuration: 4 Normally Open (NO) auxiliary contacts.
  • Contact Path Identifiers: 53/54, 63/64, 73/74, 83/84.
  • Each path: 1 NO.
• Mounting: Front snap-on mounting directly onto the contactor, ensuring easy, tool-free installation and removal.
• Terminals: Spring-loaded terminals (Cage Clamp technology) for fast, secure, and maintenance-free connection.
• Compatibility: Designed for use with SIRIUS auxiliary and power contactors, including the 3RT101 series (Size S00).
• Design: Compact, robust design with IP20 protection on the front.

Technical Specification

• Product Brand: SIRIUS
• Insulation Voltage (rated value): $690\text{ V}$
• Surge Voltage Resistance (rated value): $6\text{ kV}$
• Mechanical Service Life (typical): $10,000,000$ operating cycles
• Electrical Endurance (AC-15, $230\text{ V}$): $200,000$ operating cycles
• Protection Class: IP20 on the front

Benefit

1. Enhanced Control: Instantly increases the number of available auxiliary contacts on a contactor, allowing for more complex control and signaling applications without needing a separate auxiliary relay.
2. Fast & Secure Wiring: The spring-loaded terminal technology reduces wiring time, eliminates the need for re-tightening (maintenance-free), and provides superior resistance to vibration, increasing system reliability.
3. Space and Cost Efficiency: The front-mounting, snap-on design saves panel space and simplifies assembly compared to separate mounting solutions.
4. High Reliability: Engineered to meet stringent industrial standards, offering a long mechanical and electrical service life for dependable operation.

Application

The 3RH1911-2FA40 Auxiliary Switch Block is widely used in industrial automation and control panel building for extending the functionality of contactors. Typical applications include:

• Providing feedback signals on contactor status to PLCs or control systems.
• Interlocking and complex control circuits.
• Signaling and indication functions.

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