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USB 205 capability and testing



My company is using a USB 205 and we were wondering what type of circuit to use to test an input of a 4-20mA analog sensor that takes 10 to 30 vdc. Or if there is anything that specifically reads the outputs of a 4-20mA analog sensor

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Hello @crepsher.

Use a 250 Ω precision resistor to convert the 4-20 mA current signal to a 1 to 5 VDC voltage signal input to the USB-205 module.  Connect the resistor across the CH# and AGND terminals.  Afterwards, you will need to convert the voltage data back to current values by dividing each data point by 250 Ohms.



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