Use a proximity sensor switch to signal a machine (i.e. CNC router or laser machine) that it has reached an end or home position.
This is an inductive proximity sensor detection switch.
- Switch transistor type polarity: NPN (Negative-Positive-Negative)- Voltage Range: 6VDC to 30VDC- Detection distance from a conductive material: 4mm- Normally Open type switch: Should be connected in Parallel or on a single input
The three connections are: Positive, negative (to essentially add current to the device), and the signal out which will connect to the input terminal. The brown wire is the positive wire and should be connected to the positive terminal of a power source. The blue wire is the negative wire and should be wired to the negative terminal of the same power source. The black wire will be connected to the input terminal on the controller or interface or breakout board of the CNC router or other type of machine. Typically, this sensor would use a 24 volt DC power supply that is used with the controller or interface.
The inductive proximity sensor will engage (become closed since this switch is normally open) when a material that can conduct electricity (conductive metals) nears the proximity sensor. When the proximity sensor is engaged, the signal (black wire) will go low (0 VDC or GND). The material will determine how near the material will be before the switch engages.