Omron D4NS-2BF Safety Door Switch
Omron D4NS-2BF is a G1/2 2NC safety door switch designed to monitor protective doors and movable machine guards. Its 1-conduit construction uses a G1/2 connection for machine wiring, while the slow-action 2NC contact configuration provides 2 normally closed paths for safety circuit monitoring. A Type 2 low-level coded interlock supports mechanical guard-position detection, and the direct opening mechanism provides 10 mm minimum travel. IP67 protection supports industrial machine safety installations exposed to dust or moisture. The D4NS-2BF belongs to the D4NS Series within the machine safety interlock switch range from Omron machine safety products, linking protective access, guard detection and safety circuit switching.
| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4NS-2BF |
Omron D4NS-2BF Safety Door Switch - Technical Specifications
| Specification | Value |
|---|---|
| Type | 1-Conduit type |
| Contact configuration | Slow-action,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 | <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-2BF Safety Door Switch uses a 1-conduit G1/2 construction with slow-action 2NC contacts for monitoring protective machine doors and movable guards. Its 2 normally closed contacts provide safety switching paths, while the G1/2 conduit establishes the wiring interface for machine installation. A Type 2 low-level coded interlock mechanically detects guard position and links actuator movement with switch operation. The direct opening mechanism supports positive contact separation, providing 10 mm minimum direct opening travel. Direct opening force is 60 N minimum for standard types and 80 N minimum for high pull-force types. Operating speed ranges from 0.05 to 0.5 m/s, and IP67 enclosure protection supports industrial machine safety environments. The main product relationships are G1/2 wiring, 2NC contact switching, protective-door detection, mechanical interlocking and machine safety monitoring. These attributes provide useful model context without relying on low-value weight or resistance specifications. Within the D4NS family, conduit format and contact arrangement are practical selection criteria for related variants. The D4NS-2BF therefore connects protective guard movement with normally closed safety contact operation. For a G1/2 D4NS model requiring 2NC plus 1NO switching paths, the D4NS-2CF provides a closely related configuration.
