Omron D4NL-2BFA-B Safety Door Switch
Omron D4NL-2BFA-B is a 24 VDC guard lock safety door switch with a G1/2 conduit connection for protective machine doors. Its mechanical lock with solenoid release supports controlled access, while the 1NC/1NO + 2NC contact configuration provides switching for guard and lock status monitoring. A Type 2 low-level coded interlock provides mechanical guard-position detection, and IP67 enclosure protection supports demanding industrial machine installations. The switch operates from 0.05 to 0.5 m/s and provides 60 N minimum direct opening force with 10 mm minimum travel. The D4NL-2BFA-B belongs to the D4NL series within the machine guard lock switch range from Omron industrial safety products for protective access monitoring.
| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4NL-2BFA-B |
Omron D4NL-2BFA-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 |
| 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-2BFA-B Guard Lock Safety Door Switch combines a 24 VDC solenoid with a mechanical lock and solenoid release mechanism for controlled access through protective machine doors. Its 1NC/1NO + 2NC contact arrangement provides multiple switching paths for monitoring guard and lock conditions. A G1/2 conduit supports machine wiring, while the Type 2 low-level coded interlock provides mechanical guard-position detection. IP67 enclosure protection supports industrial machine safety installations.
The direct opening mechanism provides 60 N minimum force and 10 mm minimum travel, while operating speed ranges from 0.05 to 0.5 m/s. An orange LED supports 10 to 115 VAC/VDC indication for visual status information. The G1/2 conduit, contact configuration, mechanical locking method and solenoid release are the important attributes that distinguish this model within the D4NL guard lock safety switch family. These relationships connect the D4NL-2BFA-B with protective doors, machine guards, access control, safety interlocking and guard-status monitoring. The mechanical lock keeps the protective door secured according to the machine safety design, while the contacts communicate guard and lock conditions to the associated control circuit. For another G1/2 D4NL model using the same mechanical lock and solenoid release principle but a 2NC + 2NC contact configuration, the D4NL-2DFA-B4 provides a closely related alternative.
