Omron D4B-4A11N Limit Switch
Omron D4B-4A11N is a D4B-N Series limit switch with a resin roller lever, 2NC contacts, and a slow-action mechanism for machine position and travel detection. The roller lever suits cams and moving parts that sweep across the actuator, while the two normally closed contacts support control circuits that require dual closed paths before actuation. An M20 conduit entry supports cable routing, and the operating-speed range extends from 1 mm/s to 0.5 m/s. IP67 protection supports use around dust or moisture. The D4B-4A11N belongs to the D4B-N Series within the roller lever limit switch range from Omron industrial control products for position and end-of-travel sensing.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4B-4A11N |
Omron D4B-4A11N 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 lever (resin roller) |
| Vibration Resistance | Malfunction 10 to 55 Hz, 0.75 mm single amplitude |
| Operating Mechanism | Slow-action |
| Conduit Size Conduit Openings | M20 |
| 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-4A11N Limit Switch uses a resin roller lever with a slow-action mechanism and 2NC contact configuration for machine position and travel detection. The roller lever suits cams and moving parts that sweep across the actuator, while the two normally closed contacts support circuits that require dual closed paths before mechanical actuation. Operating speed ranges from 1 mm/s to 0.5 m/s, with up to 120 mechanical and 30 electrical operations per minute. An M20 conduit entry supports cable routing, and IP67 protection supports installations exposed to dust or moisture.
Initial contact resistance is 25 mΩ maximum, while insulation resistance is 100 MΩ minimum. Rated insulation voltage is 600 V at 50/60 Hz. The D4B-4A11N operates from -40 to 80°C with relative humidity up to 95%. Destructive shock resistance is at least 1,000 m/s² and malfunction shock resistance is at least 300 m/s². Malfunction vibration resistance covers 10 to 55 Hz at 0.75 mm single amplitude. The slow-action contact gap is specified at 2 × 2 mm minimum. These characteristics suit roller-lever position sensing where 2NC switching and defined slow-action contact separation are required. For a related D4B-N model using a roller plunger with the same 2NC slow-action configuration, see the D4B-4A71N model.
