Omron ZE-N21-2 Limit Switch
Omron ZE-N21-2 is a sealed enclosed limit switch with a crossroller plunger for directional machine position detection. The booted actuator helps protect the operating mechanism, while side mounting suits applications where moving parts pass across the roller from a defined direction. Its SPDT AC contact configuration supports 15 A at 250 VAC resistive-load switching, and the 0.01 mm/s to 0.5 m/s operating-speed range supports varied mechanical movement. IP65 protection supports use around dust or moisture. The ZE-N21-2 belongs to the ZE Series within the sealed crossroller limit switch range from Omron control components for machine travel, position, and end-point sensing.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | ZE-N21-2 |
Omron ZE-N21-2 Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Shape Structure | Sealed (Booted) |
| 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 | Sealed 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-N21-2 Limit Switch uses a sealed crossroller plunger with a booted enclosure for directional machine position detection. The crossroller actuator suits moving parts that pass across the sensing point from a defined direction, while side mounting supports installation alongside the target path. Its built-in SPDT AC switch supports 15 A at 250 VAC resistive load, 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 switching where dust or moisture may reach the switch body.
Mechanical durability is specified at 10 million operations minimum, while electrical durability reaches 500,000 operations minimum at 15 A, 250 VAC resistive load. Initial contact resistance is 15 mΩ maximum, and insulation resistance is 100 MΩ minimum at 500 VDC. The ZE-N21-2 operates from -10 to 80°C, with sealed-type humidity support up to 95% RH. Destructive shock resistance reaches 1,000 m/s² maximum, while malfunction vibration resistance covers 10 to 55 Hz at 1.5 mm double amplitude. These characteristics suit repeated AC position sensing where a sealed crossroller actuator is needed. For a related ZE Series model using a sealed roller plunger, see the ZE-N22-2 model.
