Omron D4NS-8CF Safety Door Switch
Omron D4NS-8CF is a 2-conduit safety door switch with M20 connections and slow-action MBB 2NC/1NO contacts for protective-door monitoring. Its dual-conduit construction supports machine wiring arrangements requiring separate cable entries, while the MBB contact configuration provides overlapping switching for guard status monitoring. A Type 2 low-level coded interlock provides mechanical guard-position detection, and IP67 protection supports industrial machine safety installations. Direct opening force is 60 N minimum for standard types and 80 N minimum for high pull-force types, with 10 mm minimum travel. The D4NS-8CF belongs to the D4NS series within the protective door switch range from Omron machine safety products, supporting guard detection and industrial safety circuits.
| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4NS-8CF |
Omron D4NS-8CF Safety Door Switch - Technical Specifications
| Specification | Value |
|---|---|
| Type | 2-Conduit type |
| Contact configuration | Slow-action MBB contact,2NC/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 | <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-8CF Safety Door Switch uses a 2-conduit M20 construction with slow-action MBB 2NC/1NO contacts for protective machine guard monitoring. Its dual-conduit arrangement provides separate cable entry options, while the MBB contact system provides overlapping switching. The 2NC/1NO configuration combines normally closed safety paths with a normally open status path. A Type 2 low-level coded interlock supports mechanical guard-position detection, and IP67 enclosure protection suits industrial machine safety installations.
The direct opening mechanism provides 60 N minimum force for standard types and 80 N minimum for high pull-force types, with 10 mm minimum travel. Operating speed ranges from 0.05 to 0.5 m/s. The defining relationships for this model are 2-conduit wiring, M20 connections, MBB switching, 2NC/1NO contacts and protective-door detection. These attributes connect the D4NS-8CF with safety door switches, machine guards, access monitoring and industrial safety circuits. Its dual-conduit construction is the main installation difference when compared with similar D4NS models using a single conduit entry. This makes conduit arrangement and contact function more useful selection information than secondary environmental specifications. For a closely related D4NS model using M20 wiring and the same MBB 2NC/1NO contact arrangement but with a 1-conduit construction, the D4NS-4FF provides a direct comparison.
