Omron D4N-4187 Limit Switch
Omron D4N-4187 is a snap-action limit switch with a plastic rod actuator and 1NC/1NO contact form. It uses a 1-conduit, M20 configuration and operates from 1 to 500 mm/s. Operation frequency is 30 operations/minute maximum, while IP67 protection, 25 mΩ maximum contact resistance, and 300 V rated insulation voltage are specified. The D4N-4187 Plastic Rod Switch belongs to the D4N Series within the Omron Rod Type Limit Switch Range from Omron Industrial Switch Series. Its plastic rod, 1NC/1NO contacts, snap-action mechanism, M20 conduit, and stated speed range provide the main product identity.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4N-4187 |
Omron D4N-4187 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,M20 |
| 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-4187 Limit Switch uses a plastic rod actuator with 1NC/1NO contacts and a snap-action mechanism. Its connection is specified as 1-conduit, M20. Operating speed ranges from 1 to 500 mm/s, while operation frequency is 30 operations/minute maximum. Contact resistance is 25 mΩ maximum, insulation resistance is 100 MΩ minimum, and rated insulation voltage is 300 V at 50/60 Hz. IP67 protection is specified. The operating temperature range is -30 to 70°C with no icing, while humidity is listed at 95% maximum.
Malfunction vibration resistance covers 10 to 55 Hz at 0.75 mm single amplitude. Destructive shock resistance is 1,000 m/s² minimum and malfunction shock resistance is 300 m/s² minimum. D4N-4187 is best identified through the plastic rod actuator, 1NC/1NO contact form, snap-action operation, and M20 conduit specification. The source does not list a rod material beyond plastic, rod dimensions, contact gap, or normal load rating, so those details are not inferred. The resistance, voltage, speed, frequency, temperature, vibration, shock, and IP67 values provide the supporting technical profile. For another snap-action M20 D4N model with 1NC/1NO contacts but a one-way horizontal roller arm lever, see D4N-4162.
