# input current vs output current

Finally, I just figure out something interesting.

If I set any digitial line to "1" (5v) and even I terminate the VI code, the state of the line will stay as "1" until I reset it, why is that? If you really want to output a constant current, you can either buy something to do it (like http://sine.ni.com/nips/cds/view/p/lang/en/nid/10705 ), or build something to do it (like http://www.allaboutcircuits.com/vol_3/chpt_8/7.html ) and use an analog voltage output from your computer AO board in place of the 5V (variable) source.

So, the input power is always larger than the output power. for example when switching on, hight peaks can occur. Your Input side, PF will be 1 so current value will be I (input)= P/(√3*V) Your Output side, for normal Induction motor, lets take PF will be 0.75 so current will be I (output)= P/(√3*V*0.75) = (1.33*P)/(√3*V) So this means, your output current will be 1.33 times more than input current incase of same votage from both end due to PF difference My power supplies are rated at a max of 14.6 Amps at 24 Volts. It isn’t, necessarily. If I set any digitial line to "1" (5v) and even I terminate the VI code, the state of the line will stay as "1" until I reset it, why is that? If you want to drive a heavier load such as a large relay, you may need to use a transistor circuit so the digital output can turn on or off the transistor that drives the relay coil. By the way, what happen if I want to output a constant voltage (AO or DIO) and constant current?

Input to a charge controller needs to be capable of going much higher than normal charging voltage. All trademarks acknowledged. It is pretty clear now and I did learn something here. Thanks all. I understand the output current for new is 4.5A which is OK when compared to old which provides 3.25A load since it can provide more load. 2) output voltage 1200 volts. All rights reserved. All rights reserved.

If you end the VI, it is going to stay at the value you left it at. Use of this site indicates acceptance of our Privacy Policy.