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Why 250 or 500 ohm load resistance is use in any transmitter
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Answer Posted / krishna
The transmitter normaly Gives 4-20 mA out put current. SO
when you use 250 Ohms resistance it will
produce: .004X250=1.0 Volt to .020X250 = 5olt out put
signal interms of voltage (accross the resistance),
Similarly, the 500 ohms will give an output voltage of 2 to
10 volt accross the resistance.
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