Siemens Cable operated switch, metal enclosure, 1NO+1NC

Product Overview

The 3SE7120-2DD01 is a SIRIUS cable-operated switch with metal enclosure designed for monitoring applications and emergency stop systems on industrial equipment. This safety switch features a robust metal housing with dual M20 x1.5 cable entries and operates with a 55 N spring mechanism, requiring a maximum actuating force of 80 N. The device provides reliable position monitoring through cable pull or cable snap actuation and is configured with 1 NO + 1 NC contacts without latching functionality. Suitable for cable lengths up to 5 meters, this switch operates exclusively with Bowden cable function, making it ideal for monitoring moving protection equipment and providing emergency stop capabilities on plant components where cable-operated control is required.

Key Features & Specifications

• Safety Function: Cable-operated switch for monitoring and emergency stop applications
• Enclosure: Metal housing with dual M20 x1.5 cable entries
• Contact Configuration: 1 Normally Open (NO) + 1 Normally Closed (NC)
• Operation: Without latching - cable pull monitoring only
• Cable Length: Up to 5 meters maximum
• Spring Force: 55 N spring mechanism
• Actuating Force: Maximum 80 N required
• Function: Bowden cable function exclusively
• Actuation Method: Cable pull or cable snap activation

Technical Data

• Product Series: SIRIUS 3SE71 cable-operated switches
• Enclosure Material: Metal construction for industrial durability
• Cable Entries: 2x M20 x1.5 threaded connections
• Net Weight: 0.428 kg
• Packaging Dimensions: 80.00 x 185.00 x 70.00 mm
• Operating Mechanism: 55 N spring with 80 N maximum actuating force
• Cable Compatibility: Bowden cable systems up to 5m length
• Housing Design: Robust metal enclosure for harsh industrial environments

Contact Performance

• Contact Configuration:
  • 1 Normally Open (NO) contact
  • 1 Normally Closed (NC) contact
• Switching Capacity: Industrial-grade contact ratings
• Operation Mode: Momentary switching without latching
• Electrical Life: High-cycle switching capability
• Contact Material: Industrial-grade contact materials for reliability

Safety Features

• Emergency Stop Capability: Designed for emergency stop applications on industrial equipment
• Cable Pull Monitoring: Continuous monitoring of cable tension and position
• Fail-Safe Design: NO/NC contact configuration provides fail-safe operation
• Cable Snap Detection: Responds to both cable pull and cable break conditions
• Robust Construction: Metal enclosure withstands industrial environments
• Dual Cable Entry: 2x M20 x1.5 connections for flexible installation
• Spring Return: 55 N spring ensures reliable return to neutral position

Standards & Compliance

• Safety Standards: Designed for industrial safety applications
• Product Lifecycle: PM300 Active Product status
• Export Control: AL: N / ECCN: N classification
• Environmental: RoHS directive compliance since 01.07.2006
• Waste Management: WEEE (2012/19/EU) Take-Back Obligation compliant
• Country of Origin: Germany
• Product Classification: Class A standard product with return eligibility

Applications

The 3SE7120-2DD01 is specifically designed for monitoring applications and emergency stop systems on industrial machinery where cable-operated control is essential. Ideal applications include conveyor systems, overhead cranes, production lines, and hazardous area monitoring where personnel need immediate access to emergency stop functions via cable pull mechanisms. The switch is particularly suitable for installations requiring cable spans up to 5 meters, making it perfect for large machinery guards, perimeter monitoring, and distributed emergency stop systems where operators may be positioned away from the main control panel.

Important Notes

• Cable Length Limitation: Maximum cable length of 5 meters
• Bowden Cable Only: Designed exclusively for Bowden cable function
• No Latching: This model operates without latching - cable pull monitoring only
• Force Requirements: 55 N spring force with 80 N maximum actuating force
• Installation: Dual M20 x1.5 cable entries for flexible mounting
• Version Identification: Model 3SE71...D... indicates no latching functionality

Package Information

• EAN: 4011209586529
• UPC: 754554883052
• Packaging Dimensions: 80.00 x 185.00 x 70.00 mm
• Packaging Quantity: 1 piece
• Quantity Unit: 1 Piece

Download existing graphical data for this product:

• Product Details - Siemens Industry Mall
• Technical Data Sheet (PDF)
• Product Support - Siemens Industry Online Support