Omron D4NS Safety Interlock Switch, Key, Thermosetting Resin, Key

Omron D4NS Series Safety Interlock Switch, 10A Switch Contact Current, IP67 - D4NS-1FF

This safety interlock switch is a key-operated device designed to safeguard access to machinery by interrupting circuits when a guard or door is opened. It is intended for indoor industrial installations where a secure mechanical key lock is required to control machine access and maintain operator protection.

Features & Benefits

• IP67 ingress protection maintains internal sealing in wet environments
  Two normally closed contacts provide direct-opening safety operation
  Rated switching current of 10A allows handling of heavy loads
  Operates across −30°C to 70°C for wide-temperature applications
  Thermosetting resin housing offers electrical insulation and reduced weight
  PG13.5 conduit entry simplifies conduit gland fitting and wiring

Applications

• Suitable for guarding access doors on automated assembly lines
  Ideal for interlocking enclosures in electrical control panels
  used with robotic cells requiring key removal before maintenance
  Can be used for safety gating on processing machinery
  Suitable for retrofit installations where PG13.5 conduit is standard

What contact arrangement does it provide for safety circuits?

It offers two NC contacts configured to enable direct-opening functionality for monitored protective circuits.

What electrical loads can it switch safely?

The switch is rated for contact use at up to 10A and for AC operation at 240V and DC at 250 V.

How is the device mounted and wired on-site?

The unit accepts a PG13.5 conduit entry for gland connection and uses screw terminals compatible with AWG 20 to 18 conductors.

Are there restrictions on the operating environment?

The head keyhole is not sealed (IP00) so avoid exposure there to oil, water or metal chips despite the enclosure being IP67.

What mechanical limits affect durability?

Mechanical life is specified at a minimum of 1,000,000 operations and electrical endurance varies with load, for example 300,000 operations at a 10A resistive load.