Omron D4NS-4FF Safety Door Switch
The Omron D4NS-4FF Safety Door Switch provides 1-Conduit type, 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 mΩ max. contact resistance, 300 V rated insulation voltage, 100 MΩ min. insulation resistance, and a 2 × 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-4FF |
Omron D4NS-4FF Safety Door Switch - Technical Specifications
| Specification | Value |
|---|---|
| Type | 1-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-4FF Safety Door Switch integrates a slow-action MBB contact system with 2NC and 1NO contacts, ensuring overlapping safety circuits that minimize fault potential in high-risk applications. Featuring a Type 2 interlock with low-level coding, this model is designed to deter bypass and tampering, making it ideal for critical machine safeguarding. The M20 conduit outlet allows streamlined integration with standard industrial enclosures, while the 10 mm direct opening travel ensures a reliable mechanical break when the guard is opened.
Tested for rugged performance, the D4NS-4FF endures harsh operating conditions with vibration resistance up to 55 Hz and shock resistance up to 1,000 m/s². It carries an IP67 ingress protection rating, safeguarding internal components from dust and water exposure. Supporting a 300 V insulation voltage, 100 MΩ insulation resistance, and a low 25 mΩ contact resistance, this switch ensures long-term electrical stability. Reliable across temperatures ranging from −30°C to 70°C and up to 95% ambient humidity, the Omron D4NS-4FF is trusted in sectors such as packaging, automotive assembly, and robotic automation, where uninterrupted safety control is essential.
