Omron ZC-D55 Limit Switch
Omron ZC-D55 is a compact limit switch with a 7.8 mm stainless steel plunger for direct machine position and end-of-travel detection. The straight plunger actuator suits stops, slides, jigs, and moving parts that approach the switch head-on, while the SPDT contact form provides changeover switching for general control loads. IP67 protection supports use around dust and moisture, and operation from -10 to 80°C suits a wide range of industrial environments. Long mechanical and electrical life supports repeated machine cycles. The ZC-D55 belongs to the ZC-55 Series within the compact plunger limit switch range from Omron industrial control products for dependable position sensing.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | ZC-D55 |
Omron ZC-D55 Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Ctuator | Plunger 7.8 dia. Stainless steel plunger |
| Contact Form | SPDT |
| Frequency | 50/60 Hz |
| Load | General load |
| Ambient Temperature | Operating: -10 to 80 ℃ |
| Ambient Humidity | 35 to 95% RH |
| Pollution Degree | 3 (IEC947-5-1) |
| Shock Resistance | Destruction: 1000 m/s 2 Malfunction: 300 m/s 2 |
| Degree Of Protection | IP67 |
| Contact Resistance Initial Value | 15 mΩ max. |
| Durability | Electrical: 500,000 operations min. Mechanical: 10 million operations min. |
| Insulation Resistance | 100 MΩ min. (at 500 VDC) |
The Omron ZC-D55 Limit Switch uses a 7.8 mm stainless steel plunger for direct mechanical position detection in industrial machinery. The straight actuator is suited to machine stops, slides, fixtures, and moving parts that approach the switch head-on, providing a defined switching point for travel and end-position sensing. Its SPDT contact form provides changeover switching for general control loads at 50/60 Hz. IP67 protection helps shield the switch from dust, water, and common factory contaminants. The compact plunger arrangement is useful where direct target contact is preferred over roller or lever actuation, while the -10 to 80°C operating range supports varied industrial conditions.
The ZC-D55 provides at least 10 million mechanical operations and 500,000 electrical operations, supporting repeated actuation in automated equipment. Initial contact resistance is 15 mΩ maximum, while insulation resistance is 100 MΩ minimum at 500 VDC. The switch operates with 35 to 95% relative humidity and is specified for pollution degree 3 under IEC947-5-1. Destructive shock resistance is 1,000 m/s² and malfunction shock resistance is 300 m/s². These characteristics support compact plunger-based position sensing where SPDT switching, sealed construction, and long service life are required. For a related ZC-55 model using the same plunger concept in a panel-mount arrangement, see the ZC-Q55 model.
