Omron D4NL-1BFA-B Safety Door Switch
Omron D4NL-1BFA-B is a 24 VDC guard lock safety door switch designed for protective-door interlocking and machine access control. It uses a mechanical lock with solenoid release, while the 1NC/1NO + 2NC contact configuration supports guard and lock status monitoring within the safety circuit. A Type 2 low-level coded interlock provides mechanical guard-position detection, and IP67 enclosure protection supports industrial machine installations. The direct opening mechanism provides 60 N minimum force with 10 mm minimum travel, while operating speed ranges from 0.05 to 0.5 m/s. The D4NL-1BFA-B 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-1BFA-B |
Omron D4NL-1BFA-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 | Mechanical lock Solenoid release |
| Contact configuration | 1NC/1NO+2NC |
| 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-1BFA-B Guard Lock Safety Door Switch uses a 24 VDC solenoid with a mechanical lock and solenoid release mechanism for protective machine access. Its 1NC/1NO + 2NC contact configuration provides normally closed and normally open switching paths for monitoring guard and lock conditions. A Type 2 low-level coded interlock provides mechanical guard-position detection, while IP67 enclosure protection supports industrial machine safety installations.
The direct opening mechanism provides 60 N minimum force 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 a visible status function to the guard-locking arrangement. The most important model relationships are mechanical guard locking, solenoid release, protective-door monitoring, contact configuration and machine access control. These attributes connect the D4NL-1BFA-B with guard lock safety switches and industrial safety circuits without adding low-value specifications merely to increase content length. In operation, the mechanical lock controls access while the electrical contacts provide status information to the associated machine safety system. This makes lock method and contact arrangement important when selecting among D4NL variants. For the same 1NC/1NO + 2NC contact configuration with a documented G1/2 conduit connection, the D4NL-2BFA-B provides a closely related D4NL model.
