Omron D4NS-1FF Safety Door Switch
Omron D4NS-1FF is a 1-conduit safety door switch with slow-action MBB 2NC/1NO contacts for protective machine guard monitoring. The MBB contact arrangement provides an overlapping switching sequence, while a Type 2 low-level coded interlock supports mechanical guard-position detection. Its direct opening mechanism provides 60 N minimum force for the standard type and 80 N minimum for the high pull-force type, with 10 mm minimum opening travel. IP67 enclosure protection supports industrial safety applications where dust or moisture may be present. The D4NS-1FF belongs to the D4NS series within the safety door interlock range from Omron machine safety products.
| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4NS-1FF |
Omron D4NS-1FF Safety Door Switch - Technical Specifications
| Specification | Value |
|---|---|
| Type | 1-Conduit type |
| Contact configuration | Slow-action MBB contact,2NC/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 | <Standard type> 60 N min.; <High pull-force type> 80 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: 300 m/s2 min |
| Ambient operating temperature | −30 to 70°C (with no icing) |
| Ambient operating humidity | 95% max |
| Weight | Approx. 96 g |
The Omron D4NS-1FF Safety Door Switch uses a 1-conduit construction with slow-action MBB 2NC/1NO contacts for protective machine guard monitoring. MBB switching provides an overlapping contact sequence, while the 2NC/1NO arrangement offers normally closed safety paths together with a normally open switching path. A Type 2 low-level coded interlock provides mechanical guard-position detection. IP67 enclosure protection supports industrial installations where a safety door switch may encounter dust or moisture during machine operation.
The direct opening mechanism provides 60 N minimum force for the standard type and 80 N minimum for the high pull-force type, with 10 mm minimum travel. Operating speed ranges from 0.05 to 0.5 m/s. These characteristics connect the D4NS-1FF directly with protective-door detection, machine guard monitoring, safety circuit switching and positive opening operation. The MBB contact arrangement is the most useful differentiating attribute when comparing this model with other D4NS safety door switches. Its 1-conduit construction also provides a straightforward wiring arrangement for machine doors and guarded access points. Rather than focusing on secondary environmental data, selection should primarily consider contact function, conduit arrangement, direct opening mechanism and the required guard-monitoring circuit. For a related 1-conduit D4NS model using a conventional slow-action 2NC contact configuration, the D4NS-1BF provides a useful comparison.
