Omron XE-Q21-2 Limit Switch
Omron XE-Q21-2 is a general-purpose enclosed limit switch with a crossroller plunger for directional machine position detection. The side-mounting design suits cams, slides, and moving parts that pass across the actuator, while the SPDT DC contact configuration provides changeover switching for resistive loads. Operating speed ranges from 0.01 mm/s to 0.5 m/s, supporting very slow as well as faster mechanical movement. IP65 protection supports use around dust or moisture. The XE-Q21-2 belongs to the XE Series within the crossroller plunger limit switch range from Omron control components for machine travel, position, and end-point sensing where directional roller contact is required.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | XE-Q21-2 |
Omron XE-Q21-2 Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Shape Structure | General purpose |
| Ambient Temperature | −10°C to +80°C (with no icing) |
| Ambient Humidity | General-purpose type: 35% to 85%RH Sealed type: 35% to 95%RH |
| Shock Resistance | Destruction: 1,000m/s2 max. Malfunction: 100 m/s2 max. 50 m/s2 max |
| Degree Of Protection | IP65 |
| Durability | Mechanical: 1,000,000 operations min. Electrical: 100,000 operations min., for 10 A, 125 VDC resistive load |
| Insulation Resistance | 100 MΩ min. (at 500 VDC) |
| Built In Switch | SPDT (DC) |
| Mounting Direction | Side mounting |
| Dielectric Strength | Between terminals of the same polarity: 1,000 VAC, 50/60 Hz for 1 min Between current-carrying metal part and ground: 1,500 VAC, 50/60 Hz for 1 min Between each terminal and non-current-carrying metal part: 1,500 VAC, 50/60 Hz for 1 min |
| Actuator | Crossroller plunger |
| Vibration Resistance | Malfunction: 10 to 55 Hz, 1.5-mm double amplitude |
| Operating Speed | 0.01 mm/s to 0.5 m/s |
| Operating Frequency | Mechanical: 120 operations/min Electrical: 20 operations/min |
| Contact Resistance | 15 mΩ max. (initial value) |
| Rated Frequency | 50/60 Hz |
| Weight | Approx. 260 to 280 g |
The Omron XE-Q21-2 Limit Switch uses a crossroller plunger for directional machine position detection in a general-purpose enclosed design. The actuator is suited to moving parts that pass across the roller from a defined direction, while side mounting supports compact installation beside the target path. Its built-in SPDT DC switch provides changeover control, and operating speed ranges from 0.01 mm/s to 0.5 m/s. The switch supports up to 120 mechanical and 20 electrical operations per minute. IP65 protection supports enclosed position sensing where dust or moisture may reach the switch body.
Mechanical durability is specified at 1 million operations minimum, while electrical durability reaches 100,000 operations minimum at 10 A, 125 VDC resistive load. Initial contact resistance is 15 mΩ maximum, and insulation resistance is 100 MΩ minimum at 500 VDC. The XE-Q21-2 operates from -10 to 80°C. Malfunction vibration resistance covers 10 to 55 Hz at 1.5 mm double amplitude, while destructive shock resistance reaches 1,000 m/s² maximum. These characteristics support slow or moderate directional position sensing where a crossroller actuator and DC switching are preferred for repeated position feedback. For a related XE model using a standard roller plunger instead of a crossroller plunger, see the XE-Q22-2 model.
