Measurement Computing USB-DIO96H - Manual (Page 14)

USB-DIO96H User's Guide Functional Details
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Counter input
Connect an external TTL signal to the screw terminal labeled CTR . The internal counter increments when the
TTL level transitions from low to high (rising edge transitions), and can count frequencies up to 1 MHz.
Power outputs
The USB-DIO96H has three +5 V power output terminals. Each power output terminal is labeled 5V . A total of
50 mA may be drawn from the three terminals.
Caution! Each
5V power terminal is an output. Do not connect to an external power supply or you may
damage the USB-DIO96H and possibly the computer.
Ground
The USB-DIO96H has four identical and interconnected ground ( GND ) connections - one ground terminal per
digital port group. The ground terminals provide a common ground for all USB-DIO96H functions.
Mechanical drawings
Figure 7. Circuit board dimensions
Figure 8. Enclosure dimensions