The Viator+ USB HART Modem Interface with Power Xpress and a standard PC are all you need to commission, calibrate, and acquire data from any HART device. The interface supplies up to 40 mA of current to power the device. Power is drawn via the USB port, greatly simplifying field and bench commissioning of HART devices. This is a USB to HART Protocol modem that can power your HART field device while its disconnected from the network.