Specifications:
Type: Power Generator
Model: 4-20mA
Potentiometer Installation Retaining Diameter: 10mm
Size (L x W x H): 73 x 54 x 30mm/2.9 x 2.1 x 1.2 inches
Hole spacing: 61 mm/2.4 inches.
Suitable screws: M3 (not included).
Weight: 74g (approx.)
Wiring:
3-32V: positive DC power supply
GND (left): negative power supply
GND (Right): 4-20mA output current negative
4-20mA-OUT: positive 4-20mA output current
Potentiometer: adjust the output range of 4-20mA, clockwise to increase, counterclockwise to reduce

Instruction:
About Output Impedance Matching:
The resistance of the output signal must meet the following requirements
According to the formula:I=U/R(current=voltage/resistance)
Then, the maximum current that the receiving end of the signal can generate is equal to dividing the voltage of the power supply by the resistance of the signal.
In this way, the current generator still has some resistance.
Thus concludes a formula:
Supply voltage/(internal signal resistance + internal current generator resistance) = output constant current
Signal matching requirements are given below:
For a 24V power supply, the signal resistance should not be more than 1000 ohms.
For a 12V power supply, the signal resistance should not be more than 500 ohms.
For a 5V power supply, the signal resistance should not be more than 200 ohms.
Please note that the voltage of the power supply cannot be higher than 32V.
Package includes:
1 x Signal Generator