D4NL-4GFG-B

What type of application is this guard-locking door switch intended for?

It is intended for machine guarding applications where a door or access panel must be monitored and locked as part of an interlock system. The D4NL-4GFG-B is a solenoid-lock model, meaning the guard is locked when the solenoid is energised.

What is the lock and release method?

This model uses a 24 VDC solenoid lock with mechanical release. The door is locked only while power is supplied to the solenoid, and it can be released mechanically using the release key when required by authorised personnel.

What contact configuration does it have?

It has a 3NC + 1NC/1NO slow-action contact configuration for door open/closed detection and lock monitoring. This provides multiple normally closed contacts for interlock monitoring plus an auxiliary contact arrangement.

What conduit size does this model use?

This version uses an M20 conduit outlet. M20 variants are commonly selected for installations in European machinery and control systems.

What voltage is required for the solenoid?

The solenoid is rated for 24 VDC with a typical current consumption of approximately 200 mA. The 24 VDC solenoid has polarity, so E1 (+) and E2 (-) should be wired correctly.

What indicator does the switch include?

It includes an orange LED indicator rated for 10 to 115 VAC/VDC, with a leakage current of approximately 1 mA.

What ingress protection rating does it have?

The switch body is rated IP67 to EN60947-5-1. The key hole area is not intended to be treated as fully sealed, so the installation should prevent foreign material from entering the head.

Which operation keys are compatible?

Compatible operation keys include D4DS-K1, D4DS-K2, D4DS-K3 and D4DS-K5. These cover horizontal, vertical and adjustable mounting arrangements. Operation keys are separate accessories.

What are the main operating characteristics?

Typical operating characteristics include a key insertion force of 15 N maximum, key extraction force of 30 N maximum, pre-travel distance of 9 mm maximum and movement before locking of 3 mm minimum.

What is the holding force of the switch?

The rated holding force is 1,300 N minimum. The switch should not be used as a mechanical door stopper; a separate stopper should be fitted so the operation key remains within the specified set zone.

What standards and ratings are associated with this series?

The D4NL series conforms to relevant machinery and low-voltage directives and is rated to standards including EN ISO 14119 and EN60947-5-1. Typical certified contact ratings include AC-15 at 3 A, 240 V and DC-13 at 0.27 A, 250 V.

What are the environmental operating limits?

The operating temperature range is -10°C to 55°C with no icing, and the operating humidity limit is 95% maximum. It is intended for indoor use and should not be used in locations with severe condensation, excessive vibration, or continuous exposure to oil or water.

What wiring precautions should be considered?

Power should be turned off before wiring. Suitable lead wire size is AWG20 to AWG18, equivalent to approximately 0.5 to 0.75 mm², and M3.5 crimp terminals with a thickness of 0.5 mm or less are recommended.

What tightening torques are specified for installation?

Typical tightening torques include 0.59 to 0.78 N·m for terminal screws, 0.49 to 0.69 N·m for cover and switch mounting screws, 0.49 to 0.59 N·m for head mounting screws, and 2.35 to 2.75 N·m for operation key mounting screws.

Can the head mounting direction be changed?

Yes. The head can be mounted in four directions by removing the head screws and repositioning it. The release key should be set appropriately before changing the head direction, and foreign material must be kept out of the switch interior.