Amazon.com: Pepperl + Fuchs VIATOR USB HART Modem Interface with Power Xpress, USB to HART Protocol Modem : Electronics
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Pepperl + Fuchs VIATOR HART Modems – Control Automation
Amazon.com: Full Version USB Hart Modem WS232UP Hart -USB Modem Hart Transmitter with Built-in 24VDC & Loop Resistor for All HART Device : Electronics