Data Translation DT9835, User Manual

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Chapter 1
2
Features
The DT9835 is a low-cost, high-power, digital I/O module for the
Universal Serial Bus (USB). USB is a standard for connecting PCs to
peripheral devices, such as printers, mice, and modems, and was
developed to make more low-cost ports available for the increasing
number of these devices.
Most new computers have two USB ports that allow direct
connection to USB devices. You can expand the number of USB
devices attached to a single USB port by using expansion hubs. The
DT9835 function module is part of the high-power, bus-powered USB
class; therefore, the module does not require external power, but the
expansion hubs do require external power.
The DT9835 function module resides outside of the PC and installs
with a single cable to ease installation. Modules can be “hot
swapped” or plugged and unplugged while the PC is on, making
them useful for many data acquisition applications.
The DT9835 function module provides the following major features:
• USB compatibility;
• 64 configurable digital I/O lines (configurable in banks of eight)
and 32 dedicated digital input lines for nonclocked monitoring or
control.
• Interrupt-on-change on 16 dedicated digital input lines.
• External solid-state relay module support. Digital outputs can
drive sink 12 mA, source 100 k
Ω
pullup.
• Isolated output common from the USB bus to 500 V peak.