Measurement-computing USB-DIO96H User Manual download pdf (Page 6)

Chapter 1

Introducing the USB-DIO96H

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.

You connect the field wiring directly to the device'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 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 associated DIP switches to drive the ports high or low during power up and reset (pull-up

or 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

termination 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). A USB cable is included.

The USB-DIO96H 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 hardware, which uses a 5 V power supply. Revision 1 of the

USB-DIO96H hardware has a 9 V power supply and daisy-chained hub. For information on revision 1

hardware, refer to www.mccdaq.com/PDFs/specs/USB-DIO96H_R1-spec.pdf.

Figure 1. USB-DIO96H

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Measurement-computing USB-DIO96H User Manual Page 6