Siemens Auxiliary switch, can be mounted on the sides, screw, 2NO Part number 3RV2901-1B

Product Overview

The SIRIUS 3RV2901-1B is a side-mounted auxiliary switch designed for seamless integration with 3RV2 circuit breakers. This compact auxiliary contact block provides 2 NO (Normally Open) contact configuration with screw terminal connections, enabling remote monitoring and control of circuit breaker status in industrial automation applications.

Key Features

This auxiliary switch is part of the SIRIUS modular system, providing simple, efficient, and reliable signaling for circuit breaker applications. Features side-mounting design for easy installation and maintenance, with robust construction suitable for industrial environments requiring dual normally open contact configurations for circuit breaker status feedback.

Technical Specifications

• Contact Configuration: 2 NO (2 Normally Open contacts)
• Mounting Type: Side-mounted (lateral)
• Connection Type: Screw terminals
• Frame Size Compatibility: S00/S0 circuit breakers
• Compatible Products: 3RV2 series circuit breakers
• Rated Operational Current: 4A at AC-15, 230V
• Rated Voltage: 690V AC / 250V DC
• Weight: 0.047kg
• Number of Contacts: 2 (both NO)
• Number of Changeover Contacts: 0
• Number of NC Contacts: 0

Electrical Ratings

• AC Voltage Rating: Up to 690V AC
• DC Voltage Rating: Up to 250V DC
• Operational Current: 4A at AC-15, 230V
• Contact Material: Copper contacts
• Switching Capacity: Suitable for control circuit applications
• Mechanical Life: High-reliability contact operation
• Electrical Life: Extended operational cycles

Design & Construction

Features compact side-mounting design with screw terminal connections for secure and reliable electrical connections. The auxiliary switch is designed for plug-in fixing, making installation and maintenance straightforward. Robust construction ensures reliable operation in industrial environments where dual normally open contacts are required.

Applications

This auxiliary switch is designed for various control and monitoring applications requiring dual normally open contacts, including:

• Dual circuit breaker status monitoring
• Remote indication of circuit breaker position
• Parallel control circuit operations
• Dual alarm and signaling systems
• Motor control applications requiring multiple signals
• Industrial automation systems with redundant signaling
• Process control applications with dual output requirements
• Safety circuit applications requiring multiple NO contacts

Installation & Mounting

• Mounting: Side-mounted on 3RV2 circuit breakers
• Installation: Plug-in fixing for easy attachment
• Maximum Quantity: Up to 4 auxiliary contacts per circuit breaker
• Combination: Can be combined with other auxiliary switches and signaling switches
• Compatibility: Compatible with all 3RV2 series circuit breakers
• Tool Requirements: Standard screwdriver for terminal connections

SIRIUS System Integration

• Modular System: Part of the comprehensive SIRIUS modular system
• Compatibility: Designed specifically for 3RV2 circuit breakers
• Flexibility: Can be combined with other SIRIUS components
• Standardization: Consistent design and connections across SIRIUS range
• Future-Proof: Part of current generation SIRIUS products

Wiring & Connections

• Terminal Type: Screw terminals
• Wire Range: Standard control circuit wire sizes
• Connection Method: Screw-clamp connections
• Terminal Markings: Clearly marked NO terminals
• Accessibility: Easy access for wiring and maintenance
• Dual Outputs: Two independent normally open circuits

Contact Configuration Details

• Contact Type: 2 x Normally Open (NO)
• Contact Operation: Mechanical operation linked to circuit breaker
• Contact States: Both contacts close when circuit breaker is ON
• Independent Operation: Each contact operates independently
• Isolation: Electrical isolation between contacts
• Redundancy: Dual contact configuration for reliability

Compliance & Certifications

• Country of Origin: Czech Republic
• EAN: 4011209737082
• RoHS Compliance: Since 01.10.2009
• WEEE Compliance: Yes
• REACH Regulation: Compliant with current substance restrictions
• Product Class: A: Standard stock item
• Quality Standards: Manufactured to Siemens quality standards

Operating Characteristics

• Contact Operation: Mechanical operation linked to circuit breaker
• Position Indication: Direct indication of circuit breaker status
• Response Time: Instantaneous operation with circuit breaker
• Operating Temperature: Industrial temperature range
• Environmental Protection: Suitable for industrial environments
• Vibration Resistance: Robust construction for industrial applications

Replacement & Compatibility

• Series: 3RV2901-1B (current generation)
• Compatibility: Designed specifically for 3RV2 series
• Alternative Configurations: Available with different contact arrangements (1A, 1C, 1E, 1J)
• Note: Cannot be used with 3RV27 and 3RV28 circuit breakers (signaling switch applications)

Environmental Considerations

The device is designed for industrial environments and meets environmental compliance requirements. It complies with WEEE take-back obligations and RoHS substance restrictions for environmentally responsible manufacturing and disposal.

Advantages of 2 NO Configuration

• Dual Signaling: Provides two independent normally open signals
• Redundancy: Backup signaling capability for critical applications
• Parallel Operation: Suitable for applications requiring multiple outputs
• Flexibility: Can drive multiple control circuits simultaneously
• Reliability: Independent contact operation ensures continued function

Limitations & Notes

• Maximum Quantity: A maximum of 4 auxiliary contacts with auxiliary switches can be attached per circuit breaker
• Compatibility: Auxiliary switches (2 contacts) and signaling switches can be attached individually or together
• Contact Type: Only provides normally open contacts (no NC contacts)
• Restriction: The signaling switch cannot be used with the 3RV27 and 3RV28 circuit breakers

Download existing graphical data for this product:

• Technical Datasheet (PDF)
• CAD Models and Technical Drawings
• Product Documentation
• Installation Manual