PLC sends power to 24 VDC coil of relay. Relay switches 15 volts from your 15 volt supply to the motor. Motor runs. PLC ASSUMES motor is running. If you need positive feedback that motor is running, you would need another sensor (Zero Speed Switch is industrial version, or student version is a prox switch looking at a metal target attached to motor shaft or tail pulley).
Yes, the CT1302 Reed Switch will work if you can get your magnet target within 10 to 20 mm of the face of the proximity reed switch. You will need a magnet for each switch- something similar to the suggested magnet model CT1302M. You can probably find a cheaper magnet that will work. Because it is only a magnetic reed switch (no electronic parts), it will work on any voltage from 6 to 230, AC or DC. I would buy the package deal of 15 for 31.60 each. Use 9 for car position sensors, 2 for lift positions, and 2 for entry gate and 2 for exit gate.
From experience, you really need 2 at each entry or exit, one on inside of gate and one on outside. The reason is if a car pulls in to the gate, stops, thinks about it, your sensor detects the car and assumes it will enter, then car drives away for some reason. Now your count is wrong, and your garage will lose money because there are empty spaces that are being counted as filled with a car. With two sensors, one on inside looking to see if car actually entered, that problem goes away.
The same logic applies to the exit gate. Someone may start to leave, but they decide there is one more thing to do in the city before leaving. With one exit sensor on the inside of the exit gate, your PLC would not detect that car is still in the garage. With another on the outside, the PLC can see that the car actually exited.
Is that sensor okay??? pleaseee say yes !! like the current specifications and other specs ?
