Omron D4NL-4AFG-B Safety Door Switch
Omron D4NL-4AFG-B is a 24 VDC guard lock safety door switch designed for protective-door interlocking and controlled machine access. It uses a solenoid lock with mechanical release, while the 1NC/1NO + 1NC/1NO contact configuration supports guard and lock status monitoring. An M20 conduit provides the wiring connection, and a Type 2 low-level coded interlock supports mechanical guard-position detection. IP67 protection suits industrial machine safety installations, while the direct opening mechanism provides 60 N minimum force with 10 mm minimum travel. The D4NL-4AFG-B belongs to the D4NL series within the guard lock safety switch range from Omron machine safety products for protective access control.
| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4NL-4AFG-B |
Omron D4NL-4AFG-B Safety Door Switch - Technical Specifications
| Specification | Value |
|---|---|
| Solenoid voltage/ indicator | Solenoid: 24 VDC, Orange LED: 10 to 115 VAC/VDC |
| Lock and release types | Solenoid lock Mechanical release |
| Contact configuration | 1NC/1NO+1NC/1NO |
| Conduit outlet/Connector | M20 |
| Interlock type | Type 2 |
| Coding level | Low level coded |
| Degree of protection | IP67 |
| Operating speed | 0.05 to 0.5 m/s |
| Direct opening force | 60 N min |
| Direct opening travel | 10 mm min |
| Contact resistance | 25 mΩ max. |
| Rated insulation voltage (Ui) | 300 V |
| Rated frequency | 50/60 Hz |
| Insulation resistance | 100 MΩ min. |
| Contact gap | 2 × 2 mm min |
| Vibration resistance | Malfunction 10 to 55 Hz, 0.75 mm single amplitude |
| Shock resistance | Destruction 1,000 m/s2 min. Malfunction 100 m/s2 min. |
| Ambient operating temperature | −10 to 55°C |
| Ambient operating humidity | 95% max |
| Weight | Approx. 370 g |
The Omron D4NL-4AFG-B Guard Lock Safety Door Switch uses a 24 VDC solenoid lock with mechanical release to control access through protective machine doors. Its 1NC/1NO + 1NC/1NO contact arrangement provides normally closed and normally open switching paths for monitoring guard and lock conditions. An M20 conduit supports machine wiring, while the Type 2 low-level coded interlock provides mechanical guard-position detection. The IP67 enclosure supports installation around industrial machinery where protection against dust and moisture is required.
Direct opening force is 60 N minimum with 10 mm minimum travel, and the switch supports guard movement from 0.05 to 0.5 m/s. An orange LED supports 10 to 115 VAC/VDC indication, adding visual status information to the guard locking function. For model selection, the important relationships are solenoid locking, mechanical release, M20 wiring, contact configuration and protective-door monitoring. These attributes connect the D4NL-4AFG-B with machine guards, guard lock safety switches, access control and industrial safety circuits without relying on secondary specifications. The solenoid-lock principle is especially relevant where the safety design requires electrically controlled locking with a mechanical release method. For another M20 D4NL model using the same solenoid lock and mechanical release principle but a 2NC + 1NC/1NO contact configuration, the D4NL-4CFG-B provides a closely related configuration.
