Marantec Industrial Emergency Hand Chain (AC / KE)

The Marantec Industrial Emergency Hand Chain (KE) is a manual emergency operating system integrated into industrial door operators, allowing manual opening and closing of doors during power failure or maintenance.

It is specifically used with:

• AC industrial operators (STA / STAC series)
• Sectional and roller shutter doors
• Systems with 25.4 mm hollow shaft drives

The system enables safe ground-level operation via a looped chain mechanism, ensuring continued access even when electrical operation is unavailable.

Key Features

• Manual emergency operation (KE = “Kettenbetrieb”)
• Suitable for AC industrial door operators
• Allows ground-level control via hand chain loop
• Can be combined with:
  • Maintenance release (E/KE)
  • Emergency release systems
• Designed for spring-balanced and industrial doors
• Robust mechanical construction for heavy-duty use

Technical Specifications

(Consolidated from Marantec AC/STA operator systems)

How It Works

• The operator includes a chain wheel mechanism
• A looped hand chain hangs down to operator level
• Pulling the chain:
  • Engages manual drive
  • Rotates the operator shaft
  • Opens or closes the door

This allows full mechanical control without electricity.

KE vs E/KE (Important Distinction)

• E/KE is more advanced, allowing servicing without removing the motor
• KE is the basic, widely used configuration

Typical Applications

• Warehouses
• Industrial facilities
• Loading bays
• Commercial sectional doors
• Roller shutter systems

Used where:

• Frequent operation is required
• Emergency access is critical

Safety & Compliance

• Ensures safe operation during power outages
• Prevents forced entry or damage during failures
• Must be:
  • Properly installed at reachable height
  • Maintained for smooth operation
• Often required in industrial safety standards

System Integration

The emergency hand chain is typically supplied:

• As part of a complete Marantec operator system, or
• As a configured option when ordering (KE / E-KE variants)

It integrates with:

• Limit switch systems (AWG / MEC)
• Control units (CS series)
• Safety accessories (photocells, edges)

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