I am looking for a way to read and manipulate some 4-20ma signals from my PC. ( Basically I am building a Engine Dyno and looking for a way to read and trend the signals from it). I presume there is a way to connect 4-20ma signals and convert them to RS232 which I can then analyse through my PC. Is anybody aware of any such device or can advise the best way to do it? Have though about bringing the signals to a PLC and then using a Scada package connected to the PC through the COM port to read the data but the cost is quite prohibitive for a DIY project. Any thoughts?
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