Omron D4B-2111N Limit Switch
Omron D4B-2111N is a heavy-duty limit switch with a resin roller lever and snap-action mechanism for reliable machine position and end-of-travel detection. The roller lever supports smooth actuation from cams and moving machine parts, while the 1NC/1NO contact arrangement provides separate normally closed and normally open switching paths. Operating speed ranges from 1 mm/s to 0.5 m/s, and a G1/2 conduit opening supports field wiring. IP67 protection and operation from -40 to 80°C suit demanding industrial machinery. The D4B-2111N belongs to the D4B-N Series within the heavy-duty roller lever limit switch range from Omron industrial safety products for robust machine position control.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4B-2111N |
Omron D4B-2111N 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. |
| Contact Gap | 2 × 2 mm min. (slow-action) 2 × 0.5 mm min. (snap-action) |
| Actuator | Roller lever (resin roller) |
| Vibration Resistance | Malfunction 10 to 55 Hz, 0.75 mm single amplitude |
| Operating Mechanism | Snap-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-2111N Limit Switch uses a resin roller lever with a snap-action operating mechanism for heavy-duty machine position and end-of-travel detection. The roller lever supports smooth actuation from cams and moving machine parts, while the 1NC/1NO contact configuration provides separate normally closed and normally open switching paths. Operating speed ranges from 1 mm/s to 0.5 m/s, with up to 120 mechanical operations and 30 electrical operations per minute. A G1/2 conduit opening supports field wiring, and IP67 protection suits demanding industrial machinery and factory environments.
Rated insulation voltage is 600 V, initial contact resistance is 25 mΩ maximum, and insulation resistance is 100 MΩ minimum. The D4B-2111N operates from -40 to 80°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 vibration resistance covers 10 to 55 Hz at 0.75 mm single amplitude. The snap-action contact gap is specified at 2 × 0.5 mm minimum. These characteristics suit heavy-duty roller-lever position control reliably in industrial machinery. The resin roller provides a practical contact surface for repeated cam and machine-part actuation. For a related D4B-N model using a stainless steel roller lever, see the D4B-2115N model.
