The DNA/DNR/DNF-DIO-449 are a 48 channel, high performance AC and DC digital input board designed for use in a wide variety of digital monitoring applications. The board’s inputs are divided into two, 24-bit ports, each of which presents its data in a single 24-bit write. This simplifies programming and maximizes throughput. The board reads all 48 bits at sustained rates in excess of 1 kS/second. Automatic Change Of State (COS) detection is available with 200 μS accuracy.
The board offers programmable logic thresholds and hysteresis over the full input range. Thresholds and Hysteresis are independently programmable on each channel. The board supports user programmable debouncing intervals for DC inputs which may be set on each channel independently with durations between 5 and 500 ms. Each board provides 350 Vrms isolation between the I/O and the cube and other installed I/O layers. All inputs are over-voltage protected from -350 to +350 VDC, and against ESD.
Software included with the DNA/DNR/DNF-DIO-449 provides a comprehensive yet easy to use API that supports all popular operating systems including Windows, Linux, real-time operating systems such as QNX, RTX, VXworks and more. The UEIDAQ Framework supplies complete support for those creating applications in Windows based data acquisition software languages as well as Windows application packages such as LabVIEW, MATLAB/Simulink, DASYLab or any application which supports ActiveX or OPC servers.
The “Guardian advantage” is a highly powerful diagnostic capability. A test signal injection capability is provided that allows the entire input hardware chain to be tested for proper functionality. The board can monitor switch or contacts without external circuitry. In addition, the inputs are based on A/D converters which allows a diagnostic input mode that monitors the actual analog voltage at each input. This capability combined with the board’s ability to switch a fixed reference voltage into each channel allows a complete and reliable self-test of each channel. The analog voltage measurement capability also allows a quick and accurate detection of short and open circuits as well marginal or failing drive circuitry. The analog input capability is also a powerful installation and diagnostic tool.
