voltage output

[vscid]

Hi,

What are the relative advantages and disadvantages of having a voltage output as against a current output?

 

[eromlignod]

Of what? Do you mean a constant-voltage power supply versus a constant-current one?

Don
Kansas City

 

[TheTick]

w.r.t. controls?

Current signal is less susceptible to interference.

 

[danw2]

voltage & current signals are topics on the tutorial sites below

http://www.allaboutcircuits.com/vol_1/chpt_9/2.html

http://www.allaboutcircuits.com/vol_1/chpt_9/3.html

 

[vscid]

thanks Dan.
That was realy helpful!!

 

[sreid]

Perhaps at least as important as eliminating voltage drops as a problem, many 4-20 ma sensors are powered by the current below 4 ma. This means that only two wires are required for power and the signal.