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3.4 Connecting Various Hardware Setups
ON-DAQ-USB-2401 data acquisition systems range from simple to complex. One
example of a simple system is that of one OM-DAQ-USB-2401 connected to a
PC’s USB connector. A much more complex system is one that contains 10 OM-
DAQ-USB-2401 units and a combination of USB-powered and self-powered
hubs. Despite the wide range of possibilities in between, use of the following
examples should enable you to properly connect your system.
In the examples that follow, the USB hubs have four external
ports (downstream ports). The USB hubs used in your system
may have more. Connections can be adjusted accordingly.
3.4.1 Direct Connection to Computer USB Port(s)
In this example, one DAQ unit is connected by cable to one of the computer’s
USB ports. The number of USB connectors may vary from PC to PC. When you
connect DAQ units directly to a USB connector in this manner, no additional
power source is required since the computer’s USB connector power pins supply
the DAQ with adequate power (500 mA at 4.75 to 5.25 V).
Figure 3-3. Direct Connection to a Computer USB Port(s)
Hardware Setup
3
3-4
USB
POWER
ADAPTER
(OPTIONAL)
NOTE: