ABB THRPLHDL3 Safety Switch

1. Product Overview

The ABB THRPLHDL3 Safety Switch is a safety interlock device designed for industrial automation systems to provide protection at machine guards, safety doors, and protective enclosures.
It detects the open/closed position of safety guards and generates safety signals when protection is breached. These signals can trigger machine stop, power removal, or other safety responses to prevent unauthorized access to hazardous areas.

The THRPLHDL3 features both mechanical interlock and safety contact outputs and is a key component in safety circuit design for automated machinery and production systems.

2. Technical Specifications

• Model: THRPLHDL3

• Type: Safety Switch / Interlock Switch

• Brand: ABB

• Mounting: Mounted at safety door frames or protective enclosure edges

• Switch Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC) safety contacts

• Rated Voltage: AC 240 V / DC 24 V

• Rated Current: ≤ 6 A

• Insulation Voltage: ≥ 500 V

• Protection Class: IP65 (dust tight and water spray resistant)

• Operating Temperature: -25 ℃ to +70 ℃

• Storage Temperature: -40 ℃ to +85 ℃

• Mechanical Life: ≥ 1,000,000 operations

• Structure: Compact design with minimal installation footprint

• Standards Compliance: Complies with relevant safety standards such as ISO 14119, IEC 60947-5-1

3. Key Advantages & Features

1. High Safety Design
   Mechanical interlock prevents door opening until it is safely locked, reducing risk of unintended access.

2. Industrial Protection Rating
   IP65 rating makes it suitable for dusty and splash-prone industrial environments.

3. Reliable Safety Contacts
   NO + NC contacts provide flexible connection to safety circuits and status feedback.

4. Long Service Life
   Designed for at least 1,000,000 mechanical cycles, ideal for high-frequency operation.

5. Compact Installation
   Small footprint allows easy integration with various safety doors and guards.

6. Easy System Integration
   Connects directly to safety relays, safety PLC inputs, or other safety controllers.

4. Typical Applications

• Safety door interlocks on industrial machinery

• Robot cell fencing and interlocks

• Guarded machine enclosures on production lines

• CNC machine safety door and access detection

• Safety systems for packaging machinery

• Automated warehouses and material handling safety zones

• Machine safety in food, textile, pharmaceutical industries

5. Installation & Usage Notes

1. Proper Mounting Position
   Ensure proper alignment between the switch actuator and the safety door for consistent interlock action.

2. Power Off During Installation
   Disconnect power before installing, removing, or servicing the safety switch to prevent unintended activation.

3. Safety-Grade Wiring
   Safety outputs must connect to safety relays or safety input modules and should not be mixed with ordinary control circuits.

4. Routine Inspection
   Periodically check contact states, interlock actions, and mechanical wear to ensure long-term dependable operation.

5. Environmental Considerations
   Avoid installation in areas with aggressive chemicals, high humidity, or extreme temperatures without appropriate protection.

6. Safety System Integration
   When designing systems for specific safety integrity levels (e.g., SIL / PL), configure and validate the safety switch within the overall safety architecture accordingly.

The structure and details of the product：

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