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.
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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):
Release time (contact broken):
Bounce time:
Contact assembly:
Contact load:
Repeatability:
Hysteresis: Monostable switch
Bistable switch
Service life:
Temperature range:
Switching frequency:
Shock for 11 ms
Pulse switch
Bistable switch
Vibration
Pulse switch
Bistable switch
Installation position:
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max. 2 ms
max. 0.2 ms
max. 0.5 ms
see special data sheet
see Table 2
+ 0.2 mm
app. 25%
app. 10%
109 switching cycles
(depending on contact load)
-20°C to +85°C
max. 200 Hz
max. 50 g
max. 15 g
max. 35 g (50-500Hz)
max. 10 g (50-500Hz)
as desired
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