Magnetic Switches
- Contactless activation by permanent
- Magnets or electrical magnets
- Maintenance-free
- High switching capacity
- Large temperature range
- Any installation position
- High responsiveness up to max. 30 m/s
- Almost instantaneous
- With connection cable or connection area
- Cable length 2m, 5m, 10m or 15m
- Cable: Oilflex (oil resistant), Silicon (temperature resistant) or Purwil (UV resistant)
Application
The switches are employed as magnet-sensitive contactless bistable limit switches.
Design and mode of operation
The magnetic switch consists of two dry-reed contacts embedded in cast resin and mounted in a corrosion-resistant brass casing. By the motion of a magnet, the contact and thus the circuit can be made or broken. When the contact is made, the magnetic field increases by the squared power as the air gap between the contact studs decreases and the contact closes abruptly. The contact switches almost instantaneously owing to the very small distance between the contact studs and to their low mass.
Magnetic switch bistable
The contact is magnetically locked in its respective position by means of two magnetic clamps. As the switching magnet is more powerful, the switch is set when the magnet moves over and is set back when the magnet returns.
Notice on installation
If the switch is placed on ferromagnetic material, the switching distance is reduced because the lines of force of the magnetic field become distorted or shorted when the switching magnet is brought near. If on the other hand the switching magnet is placed on ferromagnetic material, the ;switching distance is increased because the action of the switching pole and thus of the entire magnetic field is increased.
Magnetic switch monostable
With this switch design, the switch remains activated for as long as it is influenced by the magnetic field. The switch returns to neutral position when the magnet is removed.
Technical Data
| Response time (contact made): | max. 2ms |
|---|---|
| Release time (contact broken) | max. 0.2ms |
| Bounce time: | max. 0.5ms |
| Contact assembly: | see special data sheet |
| Repeatability: | see Table 2 |
| Hysteresis: Monostable switch: | approx. 25% |
| Bistable switch: | approx. 10% |
Technical data
| Response time (contact made): | max. 2 ms |
|---|---|
| Release time (contact broken): | max. 0.2 ms |
| Bounce time: | max. 0.5 ms |
| Contact assembly: | see special data sheet |
| Contact load: | see Table 2 |
| Repeatability: | + 0.2 mm |
| Hysteresis: Monostable switch Bistable switch Service life: | app. 25% |
| Bistable switch | app. 10% |
| Service life: | 109switching cycles (depending on contact load) |
| Temperature range: | -20°C to +85°C |
| Switching frequency: | max. 200 Hz |
| Shock for 11 ms Pulse switch | max. 50 g |
| Bistable switch | max. 15 g |
| Vibration Pulse switch | max. 35 g (50-500Hz) |
| Bistable switch | max. 10 g (50-500Hz) |
| Installation position: | as desired |
