PCIE 16 Channel Analogue Output Card with 3 Counter/Timers and 24 DI/O
The PCIe-DA16-16 series are x1 10.5” cards that can be installed in long PCIe slots. They contain sixteen or eight digital-to-analog converters (DACs), 24 bits of digital I/O, and three 16-bit counter/timers.
The DACs can be updated individually or simultaneously. The board features a variety of unipolar and bipolar voltage ranges or a 4-20 mA current range (sink) for each DAC giving the user a variety of options. To ensure that there will not be excessive outputs to external circuits when the board is powered on, automatic circuits limit analog outputs to zero volts until initialized via software command.
Each DIO line is buffered and capable of up to 32mA source/sink. The VCCIO logic level is globally configured via jumper selection as 5V or 3.3V. Also, ports A, B, CHi, and CLo are factory configured as pull-up (to the selected VCCIO) through 10kΩ resistor networks. These groups can be configured for pull-down as a factory option.
The card includes an emulated 82C54 counter/timer which has three 16-bit programmable down counters. These are configured as Event counters (See Block Diagram) and can also be used as a frequency source derived from an onboard 1 MHz clock. These counters can generate IRQs at a programmed frequency, and/or initiate DAC updates. This allows for very precise timing of waveform generation.
I/O connections for the DACs are made at a 37-pin D-subminiature Male connector on the card mounting bracket. I/O connections for the digital I/O and the counter/timer signals are made through a 40-pin 0.1″ IDC header and a ribbon cable to a second bracket that can install alongside the first.