Before procurement teams confirm D4NS-4DF, they typically review Omron Photoelectric Sensor, Omron Sensors and Omron D4Ds K3 to double-check performance ratings, stock availability, and supplier credibility carefully.
Omron D4NS-4DF Safety Door Switch
The Omron D4NS-4DF Safety Door Switch provides reliable machine-guard monitoring with a 1-Conduit type, M20 structure, Slow-action,3NC contacts, and a Type 2 interlock featuring Low level coded coding for enhanced operator protection. Built to withstand harsh industrial environments, it offers a robust IP67 protection rating, supports 0.05 to 0.5 m/s operating speed, and ensures dependable performance with a 10 mm min. direct opening travel. With 25 mΞ© max. contact resistance, 300 V rated insulation voltage, 100 MΞ© min. insulation resistance, and a 2 Γ 2 mm min contact gap, it delivers safe and consistent operation. Manufactured by Omron and listed under Omron Safety Door Switch solutions, this model belongs to the D4NS Series.

| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4NS-4DF |
Omron D4NS-4DF Safety Door Switch - Technical Specifications
| Specification | Value |
|---|---|
| Type | 1-Conduit type |
| Contact configuration | Slow-action,3NC |
| 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 mΞ© max. |
| Rated insulation voltage (Ui) | 300 V |
| Rated frequency | 50/60 Hz |
| Insulation resistance | 100 MΞ© min. |
| Contact gap | 2 Γ 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 | β30 to 70Β°C (with no icing) |
| Ambient operating humidity | 95% max |
| Weight | Approx. 96 g |
The Omron D4NS-4DF Safety Door Switch offers triple redundant safety through its slow-action, 3NC contacts, ensuring effective isolation in critical safety circuits. Its Type 2 interlock design with low-level coding enhances tamper resistance and meets international safety compliance. The M20 conduit outlet provides compatibility with standard industrial wiring, while the 10 mm direct opening travel guarantees dependable mechanical disconnection during door actuation.
Tested for resilience, the D4NS-4DF endures vibrations between 10β55 Hz and shock levels up to 1,000 m/sΒ², making it suitable for demanding applications like robotic workstations, press machines, and conveyor systems. With a direct opening force of 60 N (standard) and up to 80 N for high pull-force variants, this unit adapts to different safety scenarios. It boasts a rugged IP67-rated enclosure for resistance to dust and water, and operates reliably within β30Β°C to 70Β°C temperature ranges and 95% humidity. Its 300 V insulation voltage and 100 MΞ© insulation resistance make it a trusted component for electrical reliability in safety applications. Weighing approximately 96 g, the Omron D4NS-4DF delivers compact power, mechanical integrity, and proven safety assurance.




