Measurement Computing USB-DIO96H, User Manual

Page: 8 / 27

Chapter 1
Introducing the USB-DIO96H
Overview: USB-DIO96H features
This user's guide contains all of the information you need to connect the USB-DIO96H to your computer and to
the signals you want to measure or control.
The USB-DIO96H is supported under popular Microsoft
®
Windows
®
operating systems. The USB-DIO96H is
fully compatible with both USB 1.1 and USB 2.0 ports
The USB-DIO96H provides 96 digital I/O lines, high output current, and one 32-bit external event counter. The
USB-DIO96H is powered by an ex9 V unregulated power supply that is shipped with the board. A USB
cable is also included.
Power OUT and USB OUT connectors let you power and control multiple MCC USB Series products from one
external power source and one USB port in a daisy chain fashion. Depending on your load requirement, daisy
chained boards may require a separate power supply.
You can connect your field wiring directly to the board's screw terminals. The 96 digital I/O lines are available
in four independent port groups. Each digital port group is divided into two 8-bit ports and two 4-bit ports, and
is a discrete emulation of 82C55 mode zero operation. You can configure each port independently for either
input or output.
The USB-DIO96H outputs are high-drive TTL that can source 24 mA and sink 64 mA. Additional buffering is
typically not required to drive external devices.
Each digital port has an associated pull-up resistor to drive the ports high during power up and reset. You can
optionally configure this resistor for a pull-down configuration. All I/O bits are set to input mode on power up
and reset.
The USB-DIO96H also provides 50-pin mass termination connectors. For OEM's who wish to use the mass
term connectors, the enclosure needs to be removed.
The USB-DIO96H is shipped in a rugged metal enclosure that you can mount on a DIN rail or on a bench (see
Figure 1-1).
Figure 1-1. USB-DIO96H
1-1