Omron D4NS-1DF Safety Door Switch
Omron D4NS-1DF is a 3NC safety door switch designed for mechanical monitoring of protective doors and movable machine guards. Its 1-conduit construction supports machine wiring, while the slow-action 3NC contact configuration provides 3 normally closed paths for safety circuit monitoring. A Type 2 low-level coded interlock detects guard position, and the direct opening mechanism provides 10 mm minimum travel. IP67 protection supports use around industrial machinery where dust or moisture may be present. The D4NS-1DF belongs to the D4NS Series within the safety door switch range from Omron machine safety products, connecting protective guard position with machine safety circuit monitoring.
| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4NS-1DF |
Omron D4NS-1DF Safety Door Switch - Technical Specifications
| Specification | Value |
|---|---|
| Type | 1-Conduit type |
| Contact configuration | Slow-action,3NC |
| 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-1DF Safety Door Switch uses a 1-conduit construction with slow-action 3NC contacts for mechanical monitoring of protective machine doors. Its 3 normally closed contacts provide multiple switching paths for the associated safety circuit, making contact configuration an important model-selection attribute. A Type 2 low-level coded interlock establishes the mechanical relationship between the actuator and guard position. When the protective door moves from its monitored position, the direct opening mechanism supports positive separation of the safety contacts. Direct opening travel is 10 mm minimum, with 60 N minimum force for standard types and 80 N minimum for high pull-force types. IP67 enclosure protection supports installation around industrial machinery where dust or moisture may reach the switch. Operating speed ranges from 0.05 to 0.5 m/s. The main semantic relationships for this model are 3NC contacts, safety door switching, machine guard detection, direct opening operation and protective access monitoring. These functional attributes provide stronger product context than secondary weight or resistance specifications. The D4NS-1DF therefore connects protective-door movement with the machine safety circuit through mechanical interlocking and normally closed contact switching. For an M20 version using the same slow-action 3NC configuration, the D4NS-2DF provides a closely related model.
