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CIO-DIO24/CTR3 $99
24 Channel Digital IO and Counter Timer Board

CIO-DIO24/CTR3

The CIO-DIO24/CTR3 combines digital input/output and counters on one board. It has the digital lines common to the PIO-12, PIO-24 and CIO-DIO24 boards, and is also connector compatible with them.In addition, three 16-bit counters allow frequency measurement or event counting, such as monitoring the number of times a door opens or items passing on a conveyor belt.

Programming
It is very easy to program from any language that supports writing to and reading from I/O ports. An 8255 chip contains the 24 lines of digital I/O and an 8254 chip contains the 3 16- bit counters. Optional software drivers, called UNIV-DRVR, are available for programming in both DOS, Windows 3.1 and Windows 95. DOS support includes QuickBasic 4.5, Visual Basic, Turbo C, Visual C++, Microsoft C and Quick C. Windows support includes Microsoft C, Visual C++, Visual Basic, Borland C, and C++. Labview drivers are also available. (requires UNIV-DRVR)

I/O Connector
The connector carries 24 digital I/O lines plus the counter inputs and outputs. The 8255 digital I/O chip has 24 I/O lines. The chip is configured as three ports. Two ports, A and B, are 8-bits wide. Port C may be an 8-bit port or two 4-bit ports. Individual ports may be configured as input or output, and are written to or read from as a unit. Counter inputs, gates and outputs may be controlled or chained at the connector, or inboard on a counter chaining jumper.


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