Measurement Computing CIO-DAS800 - Manual (Page 5)

1 INTRODUCTION
The primary function of the board is to accept up to eight analog voltages and convert them to digital
equivalents for transmission to an ISA-bus computer. The inputs circuits are single-ended and accept
voltages in a +/-5V range. The board has a resolution of 12 bits (1 in 4096) and a maximum sampling rate
of 50 kHz when using the built-in 256-sample FIFO buffer.
The board also contains three 16-bit down-counters.
There are seven bits of digital I/O (3-input, 4-output) that are typically used to control external channel
expansion and signal conditioning boards.
2 INSTALLATION
2.1 SOFTWARE INSTALLATION
Before you open your computer and install the board, install and run InstaCal™, the installation,
calibration and test utility included with your board. InstaCal™ will guide you through switch and
jumper settings for your board. Detailed information regarding these settings can be found below. Please
refer to the Software Installation Manual for InstaCal™ installation instructions.
2.2 HARDWARE INSTALLATION
The CIO-DAS800 board is an extension of the popular CIO-DAS08 architecture. The CIO-DAS800 has
a set of registers identical to the CIO-DAS08, and an additional set of registers for the extended
functions. Software written for the DAS08 will work without modification, but will not provide access
to the extended functions. The connector is nearly identical to the CIO-DAS08. There are two jumpers
and a switch that should be set before installing the CIO-DAS800 into your computer.
2.2.1 BASE ADDRESS
The base address of the CIO-DAS800 is set by switching a bank of DIP switches on the board. This bank
of switches is labeled ADDRESS and numbered 9 to 3.
Ignore the word ON and the numbers printed on the switch
The switch works by adding up the weights of individual switches to make a base address. A 'weight' is
active when the switch is down. As shown in Figure 2-1, switches 9 and 8 are down, all others are up.
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