EuroSwitch - Installation and Operation

Switch Actuation

Euroswitch switches are actuated by the introduction of a magnetic actuator into the sensing envelope of the proximity switch.

The switch on, or the point at which the actuator causes the switch to operate, is given in mm and is often quoted as the Sensing range of the switch (sn).

Once the switch has operated it will remain in that state until the actuator is withdrawn. The actuator will need to be withdrawn by a greater distance to enable the switch to reset to its unoperated state, the difference between the switch on and switch off points is known as the switch hysteresis.

Surge Protection

Surge Protection Capacitive loads ( in extremely long cable runs ) and Lamp loads are prone to high inrush currents which can greatly reduce the life of the switch contacts on closure.

The addition of a surge suppression circuit in series with the switch and as close as possible to the switch will alleviate this problem. For normal signal circuits the capacitance in the cable can be ignored as several thousands of metres of cable will need to be connected to the switch before damage may be caused.

The circuit on the right is a typical circuit for 230v AC, please consult the factory if in doubt with your full application, we will undertake the calculations for you.

Installation

The magnetic actuator can approach the switch in two planes:
PARALLEL - where the magnet slides across the face of the switch whilst keeping parallel to the switch until the point is reached where the switch operates, if the travel is maintained after the switch on point, a second switch on point will be reached. This sequence of events will repeat in reverse if the magnet is now reversed.
PERPENDICULAR - where the magnet approaches the switch in a perpendicular direction, with the magnetic centres in line with each other. This is the method of approach on which the sensing ranges of individual switches and magnets have been determined.