A Marantec safety edge (also called a closing edge safety device) is:

A pressure- or sensor-based safety system mounted on the leading edge of a door that detects contact with an obstacle and immediately stops or reverses movement.

It is one of the primary entrapment protection systems in industrial and commercial doors.

From Marantec:

• Safety edges are part of their “safety systems, sensors, and accessories” range used to prevent accidents in door operation

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How it works (core principle)

When installed:

• Mounted on the bottom edge (closing edge) of the door

Operation:

1. Door is closing
2. If it touches an object/person:
   • The edge compresses (mechanical) OR
   • The internal sensor signal changes (optical/electrical)
3. Signal is sent to the control panel
4. Door:
   • Stops immediately, or
   • Reverses upward

 This is contact-based protection, unlike photocells (non-contact)

Marantec Safety Edges

Optical Safety Edge (Optosensor type)

How it works:

• Uses an infrared light beam inside a rubber profile
• When the edge is compressed:
  • The beam is interrupted
  • Signal is sent to controller

Key features:

• No physical electrical contact (more reliable)
• Immune to wear compared to conductive types
• Often used with spiral cable or wireless transmission

Specs:

• Protection rating: IP68 (fully dust & water resistant)
• Temperature range: -20°C to +55°C
• Signal type: transmitter/receiver system inside edge
• Cable lengths: ~10 m TX / 1 m RX typical

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Conductive Safety Edge (8k2 type)

How it works:

• Contains conductive rubber strips
• When compressed:
  • Electrical resistance changes
  • Controller detects activation

Key features:

• Simpler design
• Widely used in industrial applications
• Slightly more wear over time vs optical

Specs:

• Protection rating: IP65
• Operating temp: -10°C to +55°C
• Max length: up to 100 m
• Compliance: EN12978, TÜV certified
• Operating angle: up to 45°

Electrical & Control Integration

Safety edges connect to:

• Door control panel (e.g. CS series controllers)
• Safety circuit inputs

Typical behavior:

• Normally Closed (NC) safety circuit
• When triggered:
  • Circuit opens → system enters safe state

Optional components:

• Evaluation relay panel (24V AC/DC systems)
• Wireless signal transmission (for moving doors)

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Key Features (Marantec systems)

Contact-based entrapment protection

• Detects physical contact with obstacle
• Prevents crushing injuries

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High environmental resistance

• IP65–IP68 ratings
• Works in:
  • Dusty industrial environments
  • Outdoor conditions

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Flexible mounting

• Fits:
  • Roller shutters
  • Sectional doors
  • Sliding gates

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Long length capability

• Can cover entire door width (up to ~100 m)

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Safety compliance

• Meets:
  • EN12978 safety standard
  • TÜV certification

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System compatibility

• Works with:
  • Photocells
  • Light curtains
  • Safety catch devices

 Part of a multi-layer safety system

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Technical Summary

(The Company reserves the right to amend product specifications and information without notice.)