Omron D4NS-1BF Safety Door Switch
Omron D4NS-1BF is a 1-conduit safety door switch designed for guard-position detection on industrial machinery. It uses slow-action 2NC contacts for protective-door monitoring, while a Type 2 low-level coded interlock provides the mechanical interface between the guard and safety circuit. The switch operates at speeds from 0.05 to 0.5 m/s and provides 10 mm minimum direct opening travel. Standard versions require 60 N minimum direct opening force, while IP67 enclosure protection supports use around industrial equipment exposed to demanding operating conditions. The D4NS-1BF belongs to the D4NS series within the industrial guard switch range from Omron safety control products.
| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4NS-1BF |
Omron D4NS-1BF Safety Door Switch - Technical Specifications
| Specification | Value |
|---|---|
| Type | 1-Conduit type |
| Contact configuration | Slow-action,2NC |
| 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-1BF Safety Door Switch combines a 1-conduit construction with slow-action 2NC contacts for protective-door position monitoring. Its Type 2 low-level coded interlock provides mechanical guard detection, while IP67 enclosure protection supports industrial machine installations. Operating speed ranges from 0.05 to 0.5 m/s. Standard versions provide 60 N minimum direct opening force, while high pull-force versions are specified at 80 N minimum. Direct opening travel is 10 mm minimum, allowing mechanical contact separation when the associated protective guard is moved from its monitored position.
Electrical specifications include 25 mΩ maximum contact resistance, a 300 V rated insulation voltage, 100 MΩ minimum insulation resistance and a 2 × 2 mm minimum contact gap. Rated frequency is 50/60 Hz. Malfunction vibration resistance extends from 10 to 55 Hz at 0.75 mm single amplitude. Shock resistance reaches 1,000 m/s² minimum for destruction and 300 m/s² minimum for malfunction. The switch operates from −30 to 70°C with no icing, supports ambient humidity up to 95%. Its 2NC switching arrangement distinguishes this model from D4NS variants using 1NC/1NO contacts. For a related 1-conduit D4NS model using a slow-action 1NC/1NO contact configuration, the D4NS-1AF provides a useful related option.
