Omron D5B-8511 Limit Switch
Omron D5B-8511 is an M8 mechanical touch switch with a short-spring wobble stick actuator for light-contact detection where target alignment can vary. The flexible actuator supports multi-directional contact, while the slow-action mechanism handles resistive microloads from 1 mA at 5 VDC to 30 mA at 30 VDC. A 1 m oil-resistant cable keeps wiring close to the sensing point, and IP67 protection supports installations exposed to dust, water, or oil. The D5B-8511 belongs to the D5B Series within the mechanical touch switch range from Omron sensing products for precise contact, presence, and position detection in compact automation and inspection mechanisms.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D5B-8511 |
Omron D5B-8511 Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Type | M8 |
| Shape Structure | Touch switches |
| Electrical Ratings | 1 mA at 5 VDC to 30 mA at 30 VDC |
| Load | Resistive load |
| Actuator Detail | Short spring |
| Repeat Accuracy | Short spring |
| Material Housing | Metal |
| Ambient Temperature | Operating: –10°C to 70°C (with no icing) |
| Ambient Humidity | Operating: 95% max. |
| Shock Resistance | Mechanical: 1,000 m/s2 min. Malfunction: 300 m/s2 min. |
| Degree Of Protection | IP67 |
| Cable Specifications | Oil-resistant cable |
| Insulation Resistance | 100 MΩ min. at 250 VDC between each terminal and ground |
| Cable Length | 1 m |
| Dielectric Strength | 250 VAC, 50/60 Hz for 1 min between terminals of same polarity (TTP) 1,000 VAC, 50/60 Hz for 1 min between current-carrying metal parts and ground (600 VAC for M5 model) |
| Actuator | Wobble stick |
| Vibration Resistance | Malfunction: 10 to 55 Hz, 1.5-mm double amplitude |
| Operating Mechanism | Slow action |
| Operating Speed | 5 to 500 mm/s |
| Operating Frequency | Mechanical: 120 operations/min. Electrical: 60 operations/min |
| Contact Resistance | 700 mΩ max. |
The Omron D5B-8511 Limit Switch uses an M8 short-spring wobble stick actuator for light-contact detection where the target may approach from slightly different directions. The flexible actuator works with a slow-action mechanism and supports resistive microloads from 1 mA at 5 VDC to 30 mA at 30 VDC. Operating speed ranges from 5 to 500 mm/s, with up to 120 mechanical and 60 electrical operations per minute. A 1 m oil-resistant cable provides a short prewired connection, while the metal body and IP67 protection support use around dust, water, or oil.
Insulation resistance is 100 MΩ minimum at 250 VDC between each terminal and ground, while contact resistance is 700 mΩ maximum. The D5B-8511 operates from -10 to 70°C with relative humidity up to 95%. Mechanical shock resistance is specified at 1,000 m/s² minimum, with malfunction shock resistance of 300 m/s² minimum. Malfunction vibration resistance covers 10 to 55 Hz at 1.5 mm double amplitude. These characteristics suit compact microload sensing where multi-directional contact, short cable routing, and an M8 mounting format are important. The short cable version is useful when the control connection is located close to the switch. For the same M8 short-spring wobble stick with a longer 5 m cable, see the D5B-8515 model.
