Omron D4NS-4BF M20 Safety Door Switch In Stock Now
Safety-door Switch, 1-conduit type, M20 conduit size, 2NC (slow-action) built-in switch, four possible head mounting directions, IP67 protection rating (switch only).
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Key Features and Technical Specifications
The Omron D4NS-4BF is a next-generation safety door switch designed for reliability, flexibility, and ease of use. This D4NS series model is the perfect solution for monitoring the position of guards and doors in any industrial automation environment. Its multi-contact design saves labor, and its environment-friendly construction reduces your impact.
| Attribute | Specification |
|---|---|
| Model | D4NS-4BF |
| Built-in Switch Type | 2NC (slow-action) |
| Conduit/Connector Size | M20 (1-conduit) |
| Degree of protection | IP67 (EN60947-5-1) (Switch only) |
| Mechanical Durability | 1,000,000 operations minimum |
| Rated insulation voltage (Ui) | 300 V |
| Ambient temperature | Operating: -30°C to 70°C with no icing |
| Pollution degree | 3 (EN60947-5-1) |
| Contact resistance | 25 mΩ max. (initial value) |
| Protection against electric shock | Class II (double insulation) |
Enhanced Machinery Safety with the Omron D4NS-4BF Switch
When a guard door opens, you need a switch that acts without fail. The Omron D4NS-4BF is built for this exact purpose. It features a direct opening mechanism, which is a critical safety feature. This ensures that the contacts are physically forced open when the actuator is removed, even if the contacts have welded shut. This positive action guarantees a safe state in your control circuit.
The 2NC (two Normally Closed) contact configuration is the industry standard for safety door applications. This setup provides redundancy and allows for easy integration into safety monitoring relays or controllers.
Versatile Head and Contact Configuration for Any Door
The D4NS-4BF solves this problem with a versatile head that can be mounted in four different directions. By simply loosening four screws, you can rotate the head to fit horizontal, vertical, or any intermediate entry angle for the operation key. This flexibility dramatically simplifies design and installation.
While the D4NS4BF model provides a dual NC contact, the broader D4NS series offers a wide range of contact configurations, including 1NC/1NO and even 3NC models. This means you can standardize on the D4NS platform for all your guarding applications, whether you need simple interlocking or additional contacts for status signaling. This versatility makes the D4NS family a truly universal solution.
Why the D4NS Series Plastic Body is the Right Choice
The Omron D4NS-4BF features a robust housing and head made from high-quality resin (plastic). This material choice provides excellent durability and resistance to many industrial chemicals, oils, and coolants, ensuring a long operational life. The lightweight design also reduces the mechanical load on the guard door.
Seamless Integration in Your Automation System
A modern safety system relies on seamless communication between components. The D4NS-4BF safety door switch is designed for easy integration into any Omron industrial automation ecosystem or other safety control systems. Its clear terminal markings and spacious wiring chamber make connections quick and easy.
Frequently Asked Questions
The D4NS-4BF is a safety door switch used to monitor the position of machine guards, gates, and doors. It ensures that machinery stops when a guard is opened, preventing accidents.
No, the operation key is sold separately to allow you to choose the best type for your application. The compatible keys are from the D4DS-K series (e.g., D4DS-K1, D4DS-K2).
“2NC” stands for two Normally Closed contacts. In a safety circuit, this means both contacts are closed when the door is shut. When the door opens, both contacts open, reliably signaling the control system to stop the machine.
The switch body has an IP67 rating, which means it is completely protected against dust ingress and can withstand immersion in water up to 1 meter deep for 30 minutes.
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