Omron D4NL-2EFA-B Safety Door Switch
Omron D4NL-2EFA-B is a 24 VDC guard lock safety door switch for monitoring and interlocking protective machine guards. Its mechanical lock with solenoid release controls access to guarded areas, while the 2NC/1NO + 1NC/1NO contact arrangement supports guard and lock status switching. The G1/2 conduit provides a practical wiring connection, and a Type 2 low-level coded interlock supports mechanical guard-position detection. IP67 enclosure protection suits industrial machine safety applications, with 60 N minimum direct opening force and 10 mm minimum travel. The D4NL-2EFA-B belongs to the D4NL series within the machine guard lock switch range from Omron industrial safety products.
| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4NL-2EFA-B |
Omron D4NL-2EFA-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 | 2NC/1NO+1NC/1NO |
| 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-2EFA-B Guard Lock Safety Door Switch combines a 24 VDC solenoid with a mechanical lock and solenoid release arrangement for machine guard interlocking. Its 2NC/1NO + 1NC/1NO contact configuration provides both normally closed and normally open switching paths for monitoring protective-door and lock status. The G1/2 conduit supports wiring into the safety circuit, while a Type 2 low-level coded interlock provides mechanical guard-position detection. IP67 enclosure protection supports installation around industrial machinery where dust and moisture may be present.
A direct opening mechanism provides 60 N minimum force with 10 mm minimum travel to support positive contact separation when the protective guard is operated. The switch accepts guard movement from 0.05 to 0.5 m/s. Its orange LED supports 10 to 115 VAC/VDC indication, providing a visual status function alongside the 24 VDC solenoid operation. These relationships connect the D4NL-2EFA-B with key safety-door concepts including guard locking, protective-door detection, machine access control, contact monitoring and safety circuit switching. The mechanical lock keeps the guard secured until the solenoid release is activated according to the machine safety design. For the same G1/2 D4NL family with solenoid locking and mechanical release instead, the D4NL-2EFG-B provides the closest related configuration.
