dpeters244
Member
I have an actuator, Belimo cat.# AFB24-SR, that has 2...10VDC control input and feedback output signals. However, in their spec sheet, they say you can add a 500ohm resistor to the control signal to convert it to a 4...20mA control input signal. Now I understand with Ohm Law V=IR so
I = V/R = 2/500 = 0.004A = 4mA
I = V/R = 10/500 = 0.02A = 20mA
I got that part, but their spec sheet doesn't explain why I can't do the same to the feedback output signal and their tech support just said "it doesn't work, others have tried, you need a signal converter."
Can anyone explain this to me? I was always under the impression you didn't convert V to A with just resistors to begin with, it was always A to V. Thanks.
I = V/R = 2/500 = 0.004A = 4mA
I = V/R = 10/500 = 0.02A = 20mA
I got that part, but their spec sheet doesn't explain why I can't do the same to the feedback output signal and their tech support just said "it doesn't work, others have tried, you need a signal converter."
Can anyone explain this to me? I was always under the impression you didn't convert V to A with just resistors to begin with, it was always A to V. Thanks.