Omron D4B-2A71N Limit Switch
Omron D4B-2A71N is a slow-action D4B-N Series limit switch with a roller plunger and 2NC contact form. It uses a G1/2 (PF1/2) conduit and supports operating speeds from 1 mm/s to 0.5 m/s. Mechanical operation is specified at 120 operations per minute and electrical operation at 30 operations per minute. IP67 protection, 25 mΩ maximum contact resistance, and 100 MΩ minimum insulation resistance are listed. The D4B-2A71N belongs to the D4B-N Series within the 2NC roller plunger limit switch range from Omron limit switch products.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4B-2A71N |
Omron D4B-2A71N Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Contact Form | 2NC |
| Shock Resistance | Destruction 1,000 m/s2 min.; Malfunction 300 m/s2 min. |
| Degree Of Protection | IP67 |
| Insulation Resistance | 100 MΩ min. |
| Contact Gap | 2 × 2 mm min. (slow-action) 2 × 0.5 mm min. (snap-action) |
| Actuator | Roller plunger |
| Vibration Resistance | Malfunction 10 to 55 Hz, 0.75 mm single amplitude |
| Operating Mechanism | Slow-action |
| Conduit Size Conduit Openings | G1/2 (PF1/2) |
| Operating Speed | 1 mm/s to 0.5 m/s |
| Operating Frequency | Mechanical 120 operations/minute; Electrical 30 operations/minute |
| Contact Resistance | 25 mΩ max |
| Rated Insulation Voltage Ui | 600 V |
| Rated Frequency | 50/60 Hz |
| Ambient Operating Temperature | –40 to 80°C (with no icing) |
| Ambient Operating Humidity | 95% max |
| Weight | Approx. 250 g |
The Omron D4B-2A71N Limit Switch combines a roller plunger with 2NC contacts and a slow-action mechanism. A G1/2 (PF1/2) conduit is specified. Operating speed ranges from 1 mm/s to 0.5 m/s, with mechanical frequency of 120 operations per minute and electrical frequency of 30 operations per minute. For the slow-action mechanism, contact gap is specified at 2 × 2 mm minimum. IP67 protection, 100 MΩ minimum insulation resistance, 25 mΩ maximum contact resistance, and a 600 V rated insulation voltage are listed. Operating temperature is -40 to 80°C with humidity up to 95%.
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. The model is defined by the 2NC contact form, roller-plunger actuator, slow-action operation, and G1/2 conduit. These specifications should be used without applying the separate snap-action contact-gap value also shown in the general source field. See the verified product page for D4B-2A71N.
