Electromagnetic sensor Term definitions
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Detection sensitivity (distance)
When a standard magnet approaches the detection surface perpendicularly, the detection distance is the distance between the magnet and the detection surface when the electromagnetic sensor operates. The magnetic flux density at the standard point (electromagnetically detected element position) at that time is the detection sensitivity.
Response frequency
The frequency is the number of times the detection electromagnetism approached the surface by unit of time.
The response frequency is the frequency level for which the sensor responds to the detection electromagnetism movement.
Surface magnetic flux density
This is a physical quantity showing the strength of the magnetic force, or the magnetic flux quantity by unit of area.
Its unit is the telsa (T) or gauss (G) (with 1T=104G).
Its value varies even for magnets with the same characteristics depending on the size, the shape and the measurement location.
Operation configuration
Normally open (NO) sensors change their output to on (operation) when the magnetism is detected, and normally closed (NC) sensors change their output to off (reset) when the magnetism is detected. Select the operation configuration in accordance with your usage.
Output (Open collector)
The collector of the output transistor (NPN or PNP) is an open type and can open and close currents of the rated load current and lower.
Please note that the output transistor will burn out if the magnetic sensor is turned on by short-circuiting without connecting the load.
When using as a voltage output type, for NPN transistor open collector output, connect a load resistor externally between Vcc and OUT and use the voltage between OUT and GND as a control signal.
For the PNP transistor open collector output, connect a load resistor externally between OUT and GND and use the voltage between Vcc and OUT as a control signal.
Output (Open drain)
The output MOSFET drain is an open type and can directly open and close currents of the rated load current and lower.
Please note that the output MOSFET will burn out if the magnetic sensor is turned on by short-circuiting without connecting the load.
When using as a voltage output type, for Nch MOSFET open drain output, connect a load resistor externally between Vcc and OUT and use the voltage between OUT and GND as a control signal.
For Pch MOSFET open drain output, connect a load resistor externally between OUT and GND and use the voltage between Vcc and OUT as a control signal.
2-wire
Method to connect the sensor in series with the load, as shown in the figure.
