DAP 5200a

The DAP 5200a model brings many more real-time data acquisition and control applications within the scope of Windows systems. Its onboard 400 MHz processor substantially increases the real-time processing power of the top end of the DAP line. Real-time processing functions include smoothing, filtering, FFT, PID control, and responding to alarm conditions; the DAP 5200a also can scan high-speed data for trigger events in real time to capture pre-trigger as well as post-trigger data. Technical Note 164 shows the results for, among others, a 1024-point FFT (0.6 milliseconds per block) and FIR filters (0.2 microsecond overhead per channel plus 11 nanoseconds per tap – for a total time of 1.2 microseconds per output value for a 101-tap filter, for example).

The DAP 5200a

• has an onboard 400 MHz AMD K6-III+ processor
• comes with 32M of DRAM onboard memory
• is compatible with other a-Series boards
• uses a PCI bus for PC-based platforms
• transfers data to PC at high rates – up to 1666k samples per second
• allows fast real-time processing
• offers low latency – 0.1 ms task time quantum – for fast response
• increases sampling period resolution to 50 ns
• provides onboard emulation of DSP routines
• samples or updates the digital section at up to 1.66 million values per second
• provides 14-bit A/D converter resolution
• provides the same input and output voltage ranges as the DAP 4200a
• samples analog inputs at up to 800k samples per second
• updates analog outputs at up to 833k samples per second each
• has expandable analog and digital inputs/outputs
• complies with the EMC Directive 89/336/EEC

There is one current DAP 5200a model: the DAP 5200a/626.

All a-Series Data Acquisition Processor boards – including the DAP 5200a – share the same cabling and Eurocards for termination and expansion.

The DAP 5200a has a PCI host interface, and is capable of high speed data transfers to the host PC. Using bus mastering DMA transfers, the DAP 5200a can transfer data to the host PC at the maximum sampling rate of 1666k samples per second.

The DAP 5200a provides 14-bit A/D resolution for its 16 onboard analog inputs, and 12-bit D/A resolution for its 2 onboard analog outputs. The onboard analog input channels sample at an overall 800k samples per second, and the 16 onboard digital input channels sample at an overall rate of 1.666M words per second. The two onboard analog output channels update at an overall 1.666M updates per second, and the 16 onboard digital output channels update at an overall 1.666M words per second.

 

Through the onboard DAPL operating system, users of the DAP5200a can adjust the task scheduling interval – down to a 0.1 ms task time quantum. This means that a single task will run for no more than 0.1 ms before DAPL switches to another task. In process control applications, the system must respond to data as quickly as possible; a system with a 0.1 task time interval attends to each task regularly... and quickly.