Omron D4NL-2DFA-B4 Safety Door Switch
Omron D4NL-2DFA-B4 is a 24 VDC guard lock safety door switch with a G1/2 conduit connection for machine guard interlocking. It uses a mechanical lock with solenoid release to control protective-door access, while the 2NC + 2NC contact arrangement provides normally closed switching paths for guard and lock monitoring. A Type 2 low-level coded interlock supports mechanical guard-position detection, while IP67 protection suits industrial installations. The direct opening mechanism provides 60 N minimum force with 10 mm minimum travel, and operating speed ranges from 0.05 to 0.5 m/s. The D4NL-2DFA-B4 belongs to the D4NL series within the guard lock safety switch range from Omron machine safety products.
| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4NL-2DFA-B4 |
Omron D4NL-2DFA-B4 Safety Door Switch - Technical Specifications
| Specification | Value |
|---|---|
| Solenoid voltage/ indicator | Solenoid: 24 VDC, Orange LED: 10 to 115 VAC/VDC |
| Lock and release types | Mechanical lock Solenoid release |
| Contact configuration | 2NC+2NC |
| Conduit outlet/Connector | G1/2 |
| 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-2DFA-B4 Guard Lock Safety Door Switch uses a 24 VDC solenoid with a mechanical lock and solenoid release arrangement for machine guard interlocking. Its 2NC + 2NC contact configuration provides normally closed switching paths for protective-door and lock status monitoring. A G1/2 conduit supports wiring into the machine safety circuit, while the Type 2 low-level coded interlock provides mechanical guard-position detection. IP67 enclosure protection supports industrial installations where the switch may encounter dust or moisture.
The direct opening mechanism provides 60 N minimum force with 10 mm minimum travel, and operating speed ranges from 0.05 to 0.5 m/s. An orange LED supports 10 to 115 VAC/VDC indication for status visibility. The primary selection attributes are the 2NC + 2NC contact arrangement, G1/2 conduit, mechanical locking method and solenoid release function. These characteristics create direct relationships with guard lock safety switches, protective machine doors, access control, safety circuits and guard-position monitoring. Instead of emphasizing secondary electrical or environmental values, the model can be differentiated by the way it locks the guard and communicates door and lock states. For another G1/2 D4NL guard lock model using mechanical locking with solenoid release but a different 1NC/1NO + 2NC contact arrangement, the D4NL-2BFA-B provides a relevant related configuration.
