Omron D4N-2187 Limit Switch
Omron D4N-2187 is an industrial limit switch with a plastic rod actuator for flexible machine position and presence detection. The rod can be contacted from different directions, making it useful where target alignment varies more than with a rigid plunger or roller. Its snap-action mechanism and 1NC/1NO contact arrangement provide separate normally closed and normally open control paths, while the 1 to 500 mm/s operating-speed range supports varied machine movement. IP67 protection suits demanding factory environments. The D4N-2187 belongs to the D4N Series within the industrial limit switch range from Omron machine safety products for reliable position and travel detection.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4N-2187 |
Omron D4N-2187 Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Contact Form | 1NC/1NO |
| Shock Resistance | Destruction 1,000 m/s2 min. Malfunction 300 m/s2 min. |
| Degree Of Protection | IP67 |
| Insulation Resistance | 100 MΩ min. |
| Actuator | Plastic rod |
| Vibration Resistance | Malfunction 10 to 55 Hz, 0.75 mm single amplitude |
| Operating Mechanism | Snap-action |
| Conduit Size Conduit Openings | 1-conduit,G1/2 |
| Operating Speed | 1 to 500 mm/s |
| Operating Frequency | 30 operations/minute max. |
| Contact Resistance | 25 mΩ max. |
| Rated Insulation Voltage Ui | 300 V |
| Rated Frequency | 50/60 Hz |
| Ambient Operating Temperature | −30 to 70°C (with no icing) |
| Ambient Operating Humidity | 95% max |
| Weight | Approx. 82 g (D4N-1120); Approx. 99 g (D4N-6120) |
The Omron D4N-2187 Limit Switch uses a plastic rod actuator for flexible position and presence detection in industrial machinery. The rod can be contacted from different directions, making it useful where target alignment varies or where a rigid plunger would require more precise approach geometry. Its snap-action mechanism provides a clear switching response, while the 1NC/1NO contact arrangement gives separate normally closed and normally open control paths. Operating speed ranges from 1 to 500 mm/s, and the switch supports up to 30 operations per minute. A G1/2 one-conduit design supports practical machine wiring, while IP67 protection suits demanding factory environments.
Electrical characteristics include a 300 V rating at 50/60 Hz, 25 mΩ maximum initial contact resistance, and 100 MΩ minimum insulation resistance. The D4N-2187 operates from -30 to 70°C with humidity up to 95%. It withstands destructive shock of at least 1,000 m/s² and malfunction shock of at least 300 m/s², while malfunction vibration resistance covers 10 to 55 Hz at 0.75 mm single amplitude. These characteristics make the model suitable for flexible rod-actuated position sensing where a target may approach from varying directions. The plastic rod distinguishes this version from rigid-actuator D4N models. For a related D4N model using a roller lever and the same 1NC/1NO switching arrangement, see the D4N-2120 model.
