Measurement Computing USB-3102 - Manual (Page 8)

8
Chapter 1
Introducing the USB-3102
Overview: USB-3102 features
This user's guide contains all of the information you need to connect the USB-3102 to your computer and to the
signals you want to control. The USB-3102 is part of the Measurement Computing brand of USB-based data
acquisition products.
The USB-3102 is a USB 2.0 full-speed device that is supported under popular Microsoft
®
Windows
®
operating
systems. The USB-3102 is fully compatible with both USB 1.1 and USB 2.0 ports.
The USB-3102 provides four channels of analog voltage output, four channels of analog current output, eight
digital I/O connections, and one 32-bit event counter.
The USB-3102 has a quad (4-channel) 16-bit digital-to-analog converter (DAC). Each D/A converter output
controls a voltage and current channel pair simultaneously.
You set the voltage output range of each DAC channel independently with software for either bipolar, unipolar
or current. The bipolar range is ±10 V, the unipolar range is 0 to 10 V, and the analog current range is 0 to
20 mA. Each voltage/current channel pair can be updated individually or simultaneously. A bidirectional
synchronization connection allows you to simultaneously update the DAC outputs on multiple devices.
The USB-3102 features eight bidirectional digital I/O connections. You can configure the DIO lines as input or
output in one 8-bit port. All digital pins are floating by default. A screw terminal connection is provided for
pull-up (+5 V) or pull-down (0 volts) configuration.
The 32-bit counter can count TTL pulses.
The USB-3102 is powered by the +5 volt USB supply from your computer. No external power is required. All
I/O connections are made to the screw terminals located along each side of the USB-3102.
Figure 1. USB-3102