Omron D4N-2C20 Limit Switch
Omron D4N-2C20 combines a resin lever and resin roller with a 2NC/1NO slow-action contact arrangement. The three-contact configuration provides two normally closed paths and one normally open path from the roller-lever actuator. A G1/2 single-conduit entry is provided, with operating speed specified from 1 to 500 mm/s. IP67 protection and 25 mΩ maximum contact resistance are also listed. The D4N-2C20 is part of the D4N Series within the 2NC/1NO roller lever switch range from Omron limit switch products. Resin actuator construction is the main mechanical distinction.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4N-2C20 |
Omron D4N-2C20 Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Contact Form | 2NC/1NO |
| Shock Resistance | Destruction 1,000 m/s2 min. Malfunction 300 m/s2 min. |
| Degree Of Protection | IP67 |
| Insulation Resistance | 100 MΩ min. |
| Actuator | Roller lever (resin lever, resin roller) |
| Vibration Resistance | Malfunction 10 to 55 Hz, 0.75 mm single amplitude |
| Operating Mechanism | Slow-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-2C20 Limit Switch operates through a resin lever and resin roller combined with 2NC/1NO slow-action contacts. The three-contact arrangement provides two normally closed circuits and one normally open circuit from the same mechanical input. A G1/2 single-conduit entry is specified, while actuator speed extends from 1 to 500 mm/s. The switch supports up to 30 operations per minute. Electrical construction data includes 25 mΩ maximum contact resistance, 100 MΩ minimum insulation resistance, and 300 V rated insulation voltage at 50/60 Hz. IP67 protection is also specified.
The operating range extends from -30 to 70°C with relative humidity up to 95%. Malfunction vibration resistance is 10 to 55 Hz at 0.75 mm single amplitude, while shock resistance is at least 1,000 m/s² for destruction and 300 m/s² for malfunction. Resin construction is the most useful mechanical identifier when comparing this model with another D4N using the same 2NC/1NO contact arrangement. For an alternative with a metal lever and metal roller while retaining G1/2 conduit and slow-action switching, see the D4N-2C25 model.
