Omron ZE-Q21-2 Limit Switch
Omron ZE-Q21-2 is a general-purpose enclosed limit switch with a crossroller plunger for accurate position detection in industrial machinery. The side-mounting design suits cams, slides, and moving parts that approach the actuator from a defined direction, while the SPDT switching arrangement supports changeover control. Its 15 A at 250 VAC resistive-load capability makes it suitable for standard machine control circuits, and IP65 protection supports normal factory environments. The ZE-Q21-2 belongs to the ZE Series within the general-purpose enclosed limit switch range from Omron control components for machine travel and position monitoring.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | ZE-Q21-2 |
Omron ZE-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: 10,000,000 operations min. Electrical: 500,000 operations min., for 15 A, 250 VAC resistive load |
| Insulation Resistance | 100 MΩ min. (at 500 VDC) |
| Built In Switch | SPDT (AC) |
| 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: 2,000 VAC, 50/60 Hz for 1 min Between each terminal and non-current-carrying metal part: 2,000 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 ZE-Q21-2 Limit Switch uses a crossroller plunger actuator for defined mechanical position detection in general-purpose industrial equipment. Its side-mounting arrangement and SPDT built-in switch support applications where a moving cam, slide, or machine part approaches the actuator from a controlled direction. The switch operates from 0.01 mm/s to 0.5 m/s and supports up to 120 mechanical operations per minute. Electrical rating is 15 A at 250 VAC for a resistive load, while initial contact resistance is 15 mΩ maximum. IP65 protection supports use in factory environments where basic dust and water resistance are required.
ZE-Q21-2 is specified for at least 10 million mechanical operations and 500,000 electrical operations at 15 A, 250 VAC resistive load. Insulation resistance is 100 MΩ minimum at 500 VDC. It withstands destructive shock up to 1,000 m/s² and malfunction vibration from 10 to 55 Hz at 1.5 mm double amplitude. Operating temperature extends from -10 to 80°C, with humidity depending on the enclosure configuration. These characteristics combine high-load switching, long mechanical life, and crossroller actuation for repeatable position sensing in industrial control systems on production machinery. For another plunger-operated model suited to direct machine position detection, see the D4C-1631 compact limit switch.
