Power Switched OutputsA few computer outputs are controlled by the computer providing a power for the circuit. An example is afuel pump relay. The relay coil has ground applied to it and the computer will provide a path to powerwhen the relay is commanded on. A power switched device will have a low voltage, very close to ground, atthe computer terminal when the device is off and system voltage when the device is on.
This is the end of the preview.
access the rest of the document.