Omron D4NL-2DFA-B Safety Door Switch
Omron D4NL-2DFA-B is a 24 VDC guard lock safety door switch designed for protective machine access using mechanical locking with solenoid release. Its 2NC + 2NC contact configuration provides normally closed switching paths for monitoring guard and lock conditions, while the G1/2 conduit supports industrial machine wiring. A Type 2 low-level coded interlock provides mechanical guard-position detection, and the direct opening mechanism delivers 60 N minimum force with 10 mm minimum travel. IP67 protection suits industrial machine safety installations. The D4NL-2DFA-B belongs to the D4NL Series within the guard lock safety door switch range from Omron industrial safety products, connecting protective doors, mechanical guard locking, controlled release and safety monitoring.
| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4NL-2DFA-B |
Omron D4NL-2DFA-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+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-B Guard Lock Safety Door Switch operates with a 24 VDC solenoid and uses mechanical locking with solenoid release for controlled protective-door access. Its 2NC + 2NC contact configuration provides normally closed switching paths for monitoring guard and lock conditions. A G1/2 conduit provides the machine wiring connection, while the Type 2 low-level coded interlock supports mechanical guard-position detection. The direct opening mechanism provides 60 N minimum force with 10 mm minimum travel, and IP67 enclosure protection supports industrial machine safety installations. The important model relationships are mechanical guard locking, solenoid release, 2NC + 2NC contacts, G1/2 conduit wiring and protective access monitoring. These characteristics position the model clearly within guard lock safety applications without adding unnecessary weight or resistance specifications. The mechanical lock secures the protective guard, while the solenoid controls release and the normally closed contacts communicate guard and lock status to the associated safety circuit. An orange LED supports 10 to 115 VAC/VDC indication for visible operating status. Within the D4NL family, lock principle and contact arrangement provide meaningful comparison points. For the same G1/2 conduit and 2NC + 2NC contacts but using solenoid locking with mechanical release, the D4NL-2DFG-B provides the closest functional comparison.
