Measurement Computing USB-1408FS - Manual (Page 6)

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Chapter 1
Introducing the USB-1408FS
The USB-1408FS is a USB 2.0 full-speed analog input and digital I/O data acquisition device supported under
popular Microsoft
® Windows ® operating systems. It is designed for USB 1.1 ports, and was tested for full
compatibility with both USB 1.1 and USB 2.0 ports.
The USB-1408FS features eight analog inputs, two 12-bit analog outputs, 16 digital I/O connections, and one
32-bit external event counter.
The analog inputs are software configurable for either eight 13-bit single-ended inputs or four 14-bit differential
inputs. The digital I/O lines are independently selectable as input or output in two 8-bit ports. The 32-bit counter
can count TTL pulses. A SYNC (synchronization) I/O line allows you to pace the analog input acquisition of
one USB module from the clock output of another.
The USB-1408FS is powered by the +5 volt USB supply from your computer. No external power is required.
USB-1408FS block diagram
USB-1408FS functions are illustrated in the block diagram shown here.
Figure 1. USB-1408FS functional block diagram