Omron D4NL-2FFG-B Safety Door Switch
Omron D4NL-2FFG-B is a 24 VDC guard lock safety door switch using a solenoid lock with mechanical release for controlled access to protected machinery. Its 2NC/1NO + 2NC contact arrangement supports protective-door and lock status monitoring, while the G1/2 conduit provides the wiring connection. A Type 2 low-level coded interlock detects guard position, and IP67 enclosure protection supports industrial machine safety 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-2FFG-B belongs to the D4NL series within the guard interlock switch range from Omron industrial safety products for machine access protection.
| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4NL-2FFG-B |
Omron D4NL-2FFG-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 | Solenoid lock Mechanical release |
| Contact configuration | 2NC/1NO+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-2FFG-B Guard Lock Safety Door Switch uses a 24 VDC solenoid lock with mechanical release for controlled access through protective machine doors. Its 2NC/1NO + 2NC contact arrangement provides normally closed and normally open switching paths for monitoring guard and lock status. A G1/2 conduit supports machine wiring, while a Type 2 low-level coded interlock provides mechanical guard-position detection. IP67 enclosure protection supports demanding industrial machine safety installations.
The direct opening mechanism provides 60 N minimum force with 10 mm minimum travel, and the switch supports guard movement from 0.05 to 0.5 m/s. An orange LED supports 10 to 115 VAC/VDC indication for visible status information. The solenoid locking method is an important differentiator because it reverses the operating principle used by D4NL variants with mechanical locking and solenoid release. Together with the 2NC/1NO + 2NC contacts and G1/2 conduit, this creates clear relationships with machine access control, guard lock safety switches, protective-door monitoring and industrial safety circuits. Model selection should therefore focus on required lock behavior, contact arrangement and conduit format rather than secondary specifications that do not materially help the buyer. For another G1/2 D4NL model using a solenoid lock with mechanical release but a 2NC/1NO + 1NC/1NO contact configuration, the D4NL-2EFG-B provides a closely related configuration.
