Putting I/O on PC/104

The 104-IDIO-16 from Acces I/O products is a 32-channel PC/104 board featuring 16 optically isolated inputs and 16 optically isolated solid state outputs.

The isolated, non polarised inputs may be driven by either DC sources of 3-31V (or higher by special order) or AC sources at frequencies of 40Hz to 10KHz. Optically isolating the digital inputs from each other, and from the computer, assures smooth, error-free data transmission in noisy, real-world environments.

The 16 input channels are available via a 34-pin IDC type header. The fully protected solid state outputs are capable of driving 1A each and are available via a 50 pin IDC type header.

Each input circuit includes a jumper selectable slow/fast filter to accommodate AC inputs and is also useful for slow DC inputs in noisy environments. The filter may be manually disabled to increase the boards typical response time to 10 usec when used with faster DC inputs. The input impedance is 1.8K Ohms to accommodate a wide input range.

The board is installed by jumper selecting base addresses and IRQ. System interrupts are software controlled, enabling the board to generate an interrupt whenever one or more of the isolated digital inputs changes state. This eliminates the need for constant polling and greatly frees up system resources.

Model 104-IDIO-16E is an economy version available without the interrupt Change of State Detection feature.

The 104-IDIO-16 is designed for use in both commercial and optionally in industrial environments of 0 to +70 degrees C and -40 to +85 degrees C, respectively.

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