Introducing the usb-dio96h/50 – Measurement Computing USB-DIO96H-50 User Manual
Page 5
5
Chapter 1
Introducing the USB-DIO96H/50
The USB-DIO96H/50 is supported under popular Microsoft
®
Windows
®
operating systems. The USB-
DIO96H/50 is fully compatible with both USB 1.1 and USB 2.0 ports.
The USB-DIO96H/50 provides 96 digital I/O lines, high output current.
The 96 digital I/O lines are accessed through two 50-pin connectors. 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/50 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 associated DIP switches to drive the ports high during power up and reset. You can
optionally set these switches for a pull-down configuration. All I/O bits are set to input mode on power up and
reset.
The USB-DIO96H/50 is shipped in a rugged metal enclosure that you can mount on a DIN rail or on a bench
(see Figure 1).
The USB-DIO96H/50 is powered by an external +5 V regulated power supply that is shipped with the board. A
jumper-selectable Molex connector is also available inside the case if you need an alternate power supply (the
cable for this connector is not included).
This manual covers revision 2 hardware and later
This manual covers revision 2 of the USB-DIO96H/50 hardware, which uses a 5 V power supply. Revision 1 of
the USB-DIO96H/50 hardware has a 9 V power supply and daisy-chained hub. For information on revision 1
hardware, refer to
Figure 1. USB-DIO96H/50