Omron WLD2-LD-N Limit Switch
Omron WLD2-LD-N is a two-circuit limit switch with a top-roller plunger for mechanical position detection where the target approaches from above. The roller contact supports smooth actuation from cams and moving machine parts, while 1.7 mm maximum pretravel allows compact switching movement. Screw terminals with a G½ conduit entry simplify field wiring, and the built-in LED provides quick visual confirmation of switch operation. IP67 protection supports demanding industrial environments. The WLD2-LD-N belongs to the WL Series within the top roller plunger switch range from Omron machine automation products for dependable machine position and end-point detection.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | WLD2-LD-N |
Omron WLD2-LD-N Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Terminal Shape | Screw terminals (Conduit size: G½) |
| Pretravel Pt | 1.7 mm max. |
| Minimum Applicable Load | 5 VDC 1 mA, resistive load, P level |
| Rated Voltage | 10 to 115 VAC/DC |
| Leakage Current Reference Value | Approx. 0.4 mA at 10 VAC/DC Approx. 0.5 mA at 115 VAC/DC |
| Indicator | LED (With operation indicator) |
| Ambient Temperature | -10 to +80°C (with no icing) |
| Ambient Humidity | 35 to 95%RH |
| Shock Resistance | Destruction: 1,000 m/s2 min. Malfunction: 300 m/s2 min. |
| Degree Of Protection | IP67 |
| Insulation Resistance | 100 MΩ min. (at 500 VDC) |
| Actuator | Top-roller plunger |
| Vibration Resistance | Malfunction: 10 to 55 Hz, 1.5-mm double amplitude |
| Contact Resistance | 25 mΩ max. (initial value for the built-in switch) |
| Rated Frequency | 50/60 Hz |
The Omron WLD2-LD-N Limit Switch uses a top-roller plunger actuator for mechanical position detection where a moving target approaches from above or passes across the roller. The rolling contact helps reduce sliding friction during repeated actuation, making the switch suitable for cams, machine stops, transfer mechanisms, and compact automated equipment. Pretravel is 1.7 mm maximum, supporting short actuator movement before switching. Screw terminals with a G½ conduit entry provide field wiring, while the integrated LED operation indicator gives visible status feedback during setup. The switch supports microloads down to 5 VDC at 1 mA resistive load and operates across 10 to 115 VAC/DC. IP67 protection supports industrial use.
Insulation resistance is 100 MΩ minimum at 500 VDC, while initial contact resistance of the built-in switch is 25 mΩ maximum. The WLD2-LD-N 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 300 m/s². Malfunction vibration resistance covers 10 to 55 Hz at 1.5 mm double amplitude. The combination of top-roller actuation, LED indication, microload capability, and sealed construction supports dependable position sensing in compact machinery. The roller design is especially useful where targets sweep across the actuator instead of pressing straight down. For another LED-equipped WL Series plunger configuration, see the WLD18-LD-N model.
