4-20milliamp output fromPeakSimple
October 2013
PeakSimple is capable of outputting
one 4-20milliamp signal. Only one 4-
20ma signal per A/D board is possi-
ble. The 4-20 output signal is a two
wire cable that exits the right side of
theGC.
The usermust add a power supply of
some type and a sensing resistor.
In this case the sense resistor is 100
ohms, and has been added to the
end of the 4-20ms output cable as a
visualization aid. In reality, the power
supply and resistor would be some
distanceaway at the control room or
where the 4-20ms signal ismoni-
tored.
For a quick test, use a voltmeter con-
nectedacross the sense resistor to
measure the voltage created by the 4
-20ma current. If the
sense resistor is 100
ohms, then a 4ma cur-
rent will result in a volt-
ageof 400millivolts
across the resistor.
