Measurement Computing USB-1096HFS, Руководство пользователя

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Chapter 1
Introducing the USB-1096HFS
Overview: USB-1096HFS features
This user's guide contains all of the information you need to connect the USB-1096HFS to your computer
and to the signals you want to measure or control. The USB-1096HFS is part of the Measurement
Advantage brand of USB-based data acquisition products.
The USB-1096HFS is a USB 2.0 full-speed, high-drive digital I/O data acquisition board. It is supported
under Microsoft
®
Windows
®
98 (2
nd
edition), Windows ME, Windows 2000, and Windows XP.
The USB-1096HFS provides 96 digital I/O lines, high output current, and one 32-bit external event
counter. The USB-1096HFS 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 Measurement Advantage
boards 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-1096HFS 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-1096HFS 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-1096HFS 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-1096HFS