Omron D4NH Safety Rated Interlock Switch, Hinge Actuator Included, Plastic, Hinge

Omron D4NH Series Safety Rated Interlock Switch, 240V AC Contact Voltage, IP67 - D4NH-4AAS

This safety-rated interlock switch is a Compact hinge-lock device intended to monitor guard doors and safety equipment in industrial automation and machinery settings. It operates as a safety interlock with an integral actuator and provides fail-safe separation of normally closed contacts during guard opening, making it suitable for machine safety circuits where direct opening operation is required.

Features & Benefits

• IP67 protection for immersion resistance and sealed environments
  3A contact rating for switching standard control loads
  Operates at 240V AC and 250V DC for versatile supply use
  Four head mounting directions for flexible installation
  Plastic housing reduces weight and offers double-insulation protection
  Rated for operation from -30°C to 70°C for high-temperature use

Applications

• Suitable for guarding access panels on production machinery
  Ideal for safety circuits in packaging and assembly lines
  used with interlocked doors on electrical cabinets and enclosures
  Can be used for safety monitoring of robotic cell barriers
  Suitable for retrofit where M20 conduit connection is required

What type of conduit connection does it use for wiring?

The switch accepts an M20 conduit entry enabling use of M-style cable glands and European-style conduit fittings.

How does the internal contact mechanism behave under contamination?

The NC contacts incorporate a direct opening mechanism that forces separation even if metal deposition occurs, maintaining safe circuit interruption.

What are the expected mechanical and electrical lifespans?

Mechanical endurance is specified at a minimum of 1,000,000 operations and electrical endurance up to 500,000 operations for a resistive 3A load at 250VAC.

Can the head orientation be altered on site?

Yes, the head can be remounted in four orientations by removing the head screws to suit installation requirements.