Data Translation DT9871, User Manual

Page: 38 / 134

Chapter 3
38
Connecting to an Expansion Hub
Expansion hubs are powered by their own external power supply. Theoretically, you can
connect up to five expansion hubs to a USB port on the host computer. However, the practical
number of instruments that you can connect to a single USB port depends on the throughput
you want to achieve. Each of the hubs supports up to four instruments.
To connect multiple TEMPpoint, VOLTpoint, or MEASURpoint instruments to an expansion
hub, do the following:
1. Make sure that you have attached a power supply to the instrument.
2. Attach one end of the USB cable to the instrument and the other end of the USB cable to
an expansion hub.
3. Connect the power supply for the expansion hub to an external power supply.
4. Connect the expansion hub to the USB port on the host computer using another USB
cable.
The operating system automatically detects the instrument and starts the Found New Hardware
wizard.
5. For Windows Vista:
a. Click Locate and install driver software (recommended ).
The popup message "Windows needs your permission to continue" appears.
b. Click Continue .
The Windows Security dialog box appears.
c. Click Install this driver software anyway .
For Windows XP:
a. Click Next and/or Finish as required in the wizard.
Once the firmware is loaded, the wizard restarts to initiate the firmware to accept commands.
b. Click Next and/or Finish again.
Note: Windows 7 and Windows 8 find the device automatically.
If the power supply and the instrument are attached correctly, the USB LED on the rear panel,
shown in
Figure 10 , turns green.
6. Repeat these steps until you have attached the number of expansion hubs (up to five) and
instruments (up to four per hub) that you require. Refer to
Figure 11 .
The operating system automatically detects the instruments as they are installed.