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104-AIO12-8 - PC/104 Analog I/O Board. PC/104, Multifunction 12-bit 8 AI, 4 AO, 24 DIO

Acces I/O


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Product Datasheet

This product is RoHS-compliant

Please contact us if you require a non-RoHS version.

Please note, Acces I/O products are often available in an array of different options, of which only a selection will be displayed here. Please contact us for pricing if you require a product option that is not shown on our website.

104-AIO12-8 12-bit multifunction PC/104 analog I/O board, 8 S. E. or differential analog inputs, 4 analog outputs and 24 digital I/O lines. Speeds up to 100Khz on board pacer clock and counter timers.


The following functions are available in many configurations giving the user the ability to specify exactly what inch is needed. Interrupts are individually or globally enabled or disabled via software. A status register is provided to determine the interrupt source.


The Analog Inputs feature software programmable gain with ranges of 0-5V, 0-10V, ±5V, and ±10V. The configuration employs an instrumentation pre-amplifier per channel which allows for differential inputs, 200V Common Mode Rejection, high input impedance, and optional factory channel by channel pre-settable gain (1-200) to accommodate low-level inputs from sensors. Inputs 4-20mA are available as a factory-installable option.


Output ranges of 0-5V, 0-10V, ±5V and ±10V, are field selectable with jumpers. Note that four conversions may take place at once and that, since the D/As are double buffered, data for the next conversion may be loaded simultaneously.


The circuit uses an 82C54 (3 sixteen bit counter/timers). The user has access to each counter/timer inch™s gate, clock, and output signals. The output of counter two can be used to generate an interrupt. The software package supports counting events, frequency output, pulse and frequency measurement.

DIGITAL I/OThe circuit uses an 82C55A PPI with mode 0 supported. Ports A and B (16 lines) are buffered and pulled up to 5V. Port C features Change of State detection.


The package includes a graphical Windows setup program detailing all jumper settings. Also included are drivers, samples and utilities for DOS, Windows operating systems (Windows 95, 98, Me, NT4, 2000, XP, and 2003), and Linux. Full register-level support for use in custom real-time or embedded operating systems.