Omron D4NL-1EFA-B Safety Door Switch
Omron D4NL-1EFA-B is a 24 VDC guard lock safety door switch designed to combine protective-door monitoring with controlled guard interlocking. It uses a mechanical lock with solenoid release and a 2NC/1NO + 1NC/1NO contact configuration for monitoring door and lock conditions. A Type 2 low-level coded interlock provides mechanical guard detection, while IP67 protection supports 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-1EFA-B belongs to the D4NL series within the guard lock safety switch range from Omron industrial safety products.
| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4NL-1EFA-B |
Omron D4NL-1EFA-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 |
| 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-1EFA-B Guard Lock Safety Door Switch uses a Type 2 low-level coded interlock and IP67 enclosure protection for protective-door monitoring. Its 24 VDC solenoid operates with a mechanical lock and solenoid release arrangement, while an orange LED supports 10 to 115 VAC/VDC indication. The 2NC/1NO + 1NC/1NO contact configuration provides switching functions for monitoring guard and lock conditions. Operating speed ranges from 0.05 to 0.5 m/s, and the direct opening mechanism provides 60 N minimum force with 10 mm minimum travel.
Electrical specifications include 25 mΩ maximum contact resistance, 300 V rated insulation voltage, 100 MΩ minimum insulation resistance and a 2 × 2 mm minimum contact gap. Rated frequency is 50/60 Hz. Malfunction vibration resistance covers 10 to 55 Hz at 0.75 mm single amplitude, while shock resistance reaches 1,000 m/s² minimum for destruction and 100 m/s² minimum for malfunction. The specified operating temperature extends from −10 to 55°C, ambient humidity is rated up to 95%. This combination supports guard locking and door-status monitoring within machine safety systems. For another D4NL model using a 24 VDC solenoid and the same primary operating, electrical and environmental ratings, the D4NL-2HFA-BS-SJ provides a related guard lock configuration.
