Features: _x000D_ Easy to use, convenient wiring, knob operation, the output signal immediately output after adjusting, no delay. _x000D_ Voltage range: the input power is DC 5-28v DC, suggested the power supply is 12-24v DC. _x000D_ _x000D_ The protection function is perfect: with the input voltage reverse connect protection , the power reverse connect, the instrument does not work, it will not be damaged by the reverse. _x000D_ _x000D_ Standard current output range: 4-20mA current output can be generated by manually adjusting the potentiometer on the product, which is used for the occasion of 4-20ma output of current simulation. _x000D_ _x000D_ The current regulation is very stable: the electric current is regulated by the wire-wound potentiometer, and the current is adjusted smoothly, which avoids the faults such as the resistance mutation which is often produced by the ordinary carbon film potentiometer. _x000D_ With the current meter, display precision _x000D_ With dial, it can quickly locate and identify the running state of the equipment. _x000D_ _x000D_ Fixed current output value: the output current can be automatically and constant at the setting point according to the customer's adjustment, and also can be used as a constant current source, and the current output should be no more than 20MA when used as a constant current source _x000D_ If the test output is normal, use a multimeter(DC current ) to connect the "current +" "current -"terminals to show whether the values are consistent with the multimeter reading. _x000D_ Can be used in signal source generation, valve regulation, frequency converter control, PLC debugging, instrument test, led test, analog transmitter output. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Current: 0-20mA _x000D_ Size: 8.5 x 7 x 4.2cm/3.34 x 2.75 x 1.65inch _x000D_ Weight: 185g _x000D_ _x000D_ _x000D_ The output impedance matching problem of the current generator: _x000D_ The output signal must meet the following requirements _x000D_ According to the formula: I=U/R (current = voltage divided by resistance) _x000D_ So your power voltage divided by your signal internal resistance is the maximum current that your signal receiver can generate. _x000D_ In addition, our current generator has some internal resistance. _x000D_ _x000D_ _x000D_ So here's the formula: _x000D_ Power supply voltage/(customer's signal resistance + internal resistance of our current generator) = constant current output _x000D_ Since the power supply of our module is 4-35v, the constant current generated by the module will not be sufficient if the power supply is low and the customer's internal resistance is larger. _x000D_ The signal matching requirements of our module are given below:_x000D_ _x000D_ Power supply is 24V, the signal internal resistance 1000 _x000D_ Power supply is 12V, the signal internal resistance 500 _x000D_ _x000D_ Power supply is 5V, the signal internal resistance 200 _x000D_ _x000D_ If the internal resistance of your signal is higher than the above parameters, it can be used to solve the problem of insufficient current supply of the constant current source by improving the power supply voltage or by reducing the internal resistance of the signal. Note that the supply voltage cannot be increased to more than 28V. _x000D_ _x000D_ _x000D_ _x000D_ Package Included: _x000D_ _x000D_ _x000D_ 1 x 4-20mA Current Signal Generator