I have an inductive sensor (LJ18A3-8-Z/BX,) normally open 6V to 36V 300mA. It is connected to a 12V 80kHz single channel opto-coupler. At the moment it is connected to a 12V DC power supply.
The positive wires (brown) from the power supply and sensor are screwed into one terminal on the opto-coupler board, the negative (blue) wires between the power supply and sensor are directly connected and the final wire from the sensor (signal?) connects to the second terminal on the opto-coupler board. According to the specification sheet for the sensor, it operates at 12V 8mA or 24V 15mA.
Can I change the supply voltage to 24V and if so, would I need to change or add a resistor to the opto-coupler board?
Between the terminals on the board and the opto-coupler chip is a 1Kohm resistor and a red LED on the other side. My thinking is I've essentially increased the power in the circuit by a factor of 4, assuming I should also increase the resistor by a factor of 4 as well?
optocoupler link data on the optocoupler link to supplier