Omron D4NL-4CFA-B Safety Door Switch
Omron D4NL-4CFA-B is a 24 VDC M20 guard lock safety switch with a 2NC + 1NC/1NO contact configuration for monitoring protective-door and lock status. It combines a mechanical lock with solenoid release to support controlled access to guarded machine areas. The Type 2 low-level coded interlock provides guard-position monitoring, while IP67 enclosure protection supports industrial machine installations. An orange LED rated for 10 to 115 VAC/VDC provides indication, and the direct opening mechanism delivers a 60 N minimum opening force. The D4NL-4CFA-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-4CFA-B |
Omron D4NL-4CFA-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+1NC/1NO |
| Conduit outlet/Connector | M20 |
| 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-4CFA-B Guard Lock Safety Switch uses a Type 2 low-level coded interlock with IP67 enclosure protection. Its mechanical lock operates with solenoid release, while an orange LED supports 10 to 115 VAC/VDC indication. Operating speed ranges from 0.05 to 0.5 m/s, and the direct opening mechanism provides a minimum opening force of 60 N with 10 mm minimum travel. The 2NC + 1NC/1NO contact configuration provides the switching arrangement for protective-door and lock-status monitoring, while an M20 conduit outlet provides the connection interface.
Electrical ratings 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. Shock resistance reaches 1,000 m/s² minimum for destruction and 100 m/s² minimum for malfunction. The unit operates from −10 to 55°C at ambient humidity levels up to 95%. For an M20 D4NL configuration using the same 24 VDC solenoid and mechanical-lock/solenoid-release arrangement but a 1NC/1NO + 1NC/1NO contact configuration, the D4NL-4AFA-B provides the closest related model.
