Omron VB-2221 Limit Switch
Omron VB-2221 is a multiple limit switch with two roller plungers for detecting multiple machine positions from one switch assembly. Each actuator uses a 6.8 mm roller for smooth contact with moving parts, while flange mounting provides stable installation on industrial machinery. Four built-in switches allow several control signals to be generated from the compact unit, making it useful in equipment that requires coordinated position feedback. IP67 protection supports demanding factory environments. The VB-2221 belongs to the VB Series within the multiple position limit switch range from Omron automation products for multi-point machine detection and sequence control.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | VB-2221 |
Omron VB-2221 Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Number Of Plungers | 2 plungers |
| Shape Of Box | With flange |
| Conduit | Four |
| Ambient Temperature | –10°C to 80°C (with no icing) |
| Ambient Humidity | 35% to 95% |
| Shock Resistance | Destruction: 1,000 m/s2 min. Malfunction: 200 m/s2 min. |
| Degree Of Protection | IP67 |
| Durability | Mechanical: 5,000,000 operations min. Electrical: 300,000 operations min. (10 A at 250 VAC, resistive load) |
| Insulation Resistance | 100 MΩ min. (at 500 VDC) |
| Actuator | Roller plunger (with a 6.8-dia. roller) |
| Vibration Resistance | Malfunction: 10 to 55 Hz, 1.5-mm double amplitude |
| Operating Speed | 0.1 mm to 0.5 m/s |
| Operating Frequency | Mechanical: 120 operations min. Electrical: 30 operations min. |
| Contact Resistance | 15 mΩ max. (initial value) |
| Rated Insulation Voltage Ui | 300 VAC |
| Rated Frequency | 50/60 Hz (AC) |
| Weight | Approx. 580 g |
The Omron VB-2221 Limit Switch is a multiple limit switch with two roller plungers, each using a 6.8 mm roller for smooth mechanical actuation. The dual-plunger arrangement allows more than one machine position to be detected from a single enclosed switch body, making it useful on automated machinery requiring coordinated position signals. Flange mounting provides a stable installation surface, while the permitted operating speed ranges from 0.1 mm/s to 0.5 m/s. The switch is rated for 10 A at 250 VAC resistive load and supports up to 120 mechanical operations per minute. IP67 protection supports use in dusty, wet, or demanding industrial environments.
Mechanical durability is specified at 5 million operations minimum, with electrical durability of 300,000 operations minimum at 10 A, 250 VAC resistive load. Initial contact resistance is 15 mΩ maximum, and insulation resistance is 100 MΩ minimum at 500 VDC. The VB-2221 operates from -10 to 80°C with 35 to 95% relative humidity. It withstands destructive shock of at least 1,000 m/s² and malfunction shock of at least 200 m/s², while vibration resistance covers 10 to 55 Hz at 1.5 mm double amplitude. These characteristics suit multi-point machine detection where several signals must be obtained from one compact unit. For applications requiring four roller plungers in the same VB family, see the VB-4211 model.
