4-20mA Signal Generator Adjustable Constant Current Source Digital Analog Generator + 12V Power Supply

4-20mA Signal Generator Adjustable Constant Current Source Digital Analog Generator + 12V Power Supply

Features:
- Analog Circuit Adopted: Compared with current generators using digital circuit, the signal generator avoids secondary pollution to output current caused by analog-to-digital conversion and digital-to-analog conversion process. Simple circuit features no radiation, pure current, no ripple and stability.
- Easy Operation: It is convenient to wire. Turn the knob to operate and it outputs after adjustment without delay.
- Wide Power Supply Voltage: Input DC 5-28V. 12-24V is recommended.
- Reverse Connection Protection: Thanks to reverse connection protection for input voltage, the instrument does not work and will not burn out when it is connected reversely.
- Standard Current Output Range: It can produce and output 4-20mA current by manually adjusting the potentiometer on the product. It is perfect for occasions where analog current 4-20mA output is needed.
- Smooth Current Regulation: The wire-wound potentiometer is used to adjust current smoothly, avoiding faults such as sudden change of resistance often caused by the general carbon film potentiometer.
- Precise Display: With an ammeter, it can display accurately.
- Convenient Monitoring: With a dial, it can quickly locate and identify the operating state of the device according to the scale.
- Fixed Output Current: The output current automatically stays constant at the set point to meet users' needs. When it is used as a constant current source, the output current should not exceed 20mA.
- Applications: Signal source generation, valve adjustment, inverter control, PLC debugging, instrument testing, LED test, and analog transmitter output.
- Hand-held Design: It is easy to hold and turns your jobs into a pleasure.
- To test whether the output is normal, you can make a multimeter (DC current) and terminals of current + & current - short connected. And then compare the displayed values to the multimeter readings.

Wiring:

Output Impedance Matching:
The internal resistance of the output signal must meet the following requirements:
According to the formula: I = U / R (current = voltage divided by resistance)

Therefore, the power supply voltage divided by the signal internal resistance is equal to the maximum current that can be generated at the signal receiving end.

In addition, our current generators have a certain internal resistance.

So come to a formula like this:
Supply voltage / (customer signal internal resistance + internal resistance of our current generator) = constant current output

Our module can be powered by 4-35V. If the power supply voltage is too low and the internal resistance of yours is large, the constant current generated by the module will not be enough.

The module's signal matching requirements:
- Powered by 24V, the internal resistance of signal shall not exceed 1000Ω.
- Powered by 12V, the internal resistance of signal shall not exceed 500Ω.
- Powered by 5V, the internal resistance of signal shall not exceed 200Ω.

Attention: If your signal internal resistance is greater than the above parameters, you can solve the problem of insufficient current supply of the constant current source by increasing the supply voltage or reducing the internal resistance of the signal. The power supply voltage cannot be increased above 28V.

Package Included:
- 1 x 4-20mA Current Signal Generator
- 1 x 12V Power Supply