HM-USB-PWR User Manual
MAN-1044 6/15/2017
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HM-USB-PWR User Manual
Introduction
The HM-USB-PWR HART
®
Modem is designed to connect PC’s to HART networks.
Application software can then configure, monitor, and document HART based
instrumentation. The power supply feature can also power HART transmitters.
Software Drivers
Before use, a USB Virtual Serial Port must be installed on the PC. Insert the enclosed
CD into your PC. The USB Virtual Serial Port driver should install automatically. Once
the driver is installed, you can connect the HM-USB-PWR to the USB port on your PC.
Windows
After the HM-USB-PWR is connected and the New Hardware Found wizard is finished,
the following will appear at the bottom of the screen:
Note: A completion message may not appear on some system.
COM Port Assignment
After installing, and with the HM-USB-PWR still connected to the PC, go to Start ->
Settings -> Control Panel -> System -> Hardware -> Device Manager -> Ports, to see
what COM port number was assigned to the modem by the Windows operating system.
The port labeled “USB Serial Port” is the assigned port.
Alternatively, if you click on the “Your devices are ready to use” message, the assigned
COM port will be listed.
This port assignment can be changed by the user. From the “Device Manager” menu,
select the USB Serial Port you wish to change. From the “Properties” page, select “Port
Settings”. Then select “Advanced”. The COM port can be set in the range 1-256.
Operating Modes
Three different operating modes are available - Power + Modem
Modem Only, and Power Only. Each requires different cable setups.
Power + Modem
Connect the supplied HART cable to the “Modem + Power” connector on the HM-USB-
PWR. The 24Vdc LED should illuminate.
Connect the Red connector to the positive (+) terminal of the HART Transmitter.
Connect the Black connector to the negative (-) terminal of the HART transmitter. The
