Omron D4NL-2CFA-B Safety Door Switch
Omron D4NL-2CFA-B is a 24 VDC guard lock safety door switch designed for protective-door interlocking on industrial machinery. It uses a mechanical lock with solenoid release and combines 2NC contacts with 1NC/1NO switching for guard and lock status monitoring. A G1/2 conduit supports wiring, while the Type 2 low-level coded interlock provides mechanical guard-position detection. IP67 protection supports machine safety installations exposed to dust and moisture, and the direct opening mechanism provides 60 N minimum force with 10 mm minimum travel. The D4NL-2CFA-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-2CFA-B |
Omron D4NL-2CFA-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 | 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-2CFA-B Guard Lock Safety Door Switch combines a 24 VDC solenoid with a mechanical lock and solenoid release mechanism for protective-door interlocking. Its 2NC + 1NC/1NO contact arrangement provides switching paths for monitoring guard and lock conditions within a machine safety circuit. A G1/2 conduit supports wiring, while the Type 2 low-level coded interlock provides mechanical guard-position detection. IP67 enclosure protection helps protect the switch against dust and water during industrial operation.
The direct opening mechanism provides 60 N minimum force and 10 mm minimum travel, supporting positive contact separation when the protective guard is operated. The switch supports guard movement from 0.05 to 0.5 m/s. Its 24 VDC solenoid controls the release function, while the orange LED supports 10 to 115 VAC/VDC indication for machine status visibility. This combination makes the D4NL-2CFA-B relevant to machine doors, guarded access points and equipment where the guard must remain mechanically locked until release is permitted. The contact arrangement, G1/2 wiring entry, guard locking and status monitoring functions define the model more clearly than secondary environmental specifications. For another G1/2 D4NL guard lock switch using a different contact arrangement, the D4NL-2EFA-B provides a closely related configuration.
