Recommended for all new systems: DAP 5000a Data Acquisition Board
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Obsolete |
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The DAP 4200a is now an Obsolete product. For new systems, use the DAP 5000a model.
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The DAP 4200a:
- has an onboard Intel i486 processor
- comes with 16M of DRAM onboard memory
- is compatible with other a-Series boards
- works with the 5V PCI bus for PC-based platforms
- transfers data to PC at high rates – up to 1.666M samples per second
- allows fast real-time processing
- offers low latency – 0.2 ms task time quantum – for fast response
- increases sampling period resolution to 100 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 input voltage ranges of 0 to 5 volts, +/-2.5 volts, +/-5 volts, and +/-10 volts
- provides output voltage ranges of 0 to 5 volts, +/-2.5 volts, +/-5 volts, +/-10 volts, and 0 to 10 volts
- samples analog inputs at up to 769K 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 DAP 4200a model: the DAP 4200a/526.
The DAP 4200a uses the same type of analog and digital connectors as other a-series boards, so the DAP 4200a is compatible with all the same cabling and Eurocards for termination and expansion. All a-Series Data Acquisition Processor boards share the same Channel Architecture.
The DAP 4200a has a PCI host interface, and is capable of high speed data transfers to the host PC. The DAP 4200a requires a 5V 32-bit PCI slot. Using bus mastering DMA transfers, the DAP 4200a can transfer data to the host PC at 3.2M samples per second.
The DAP 4200a 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 769k samples per second at 12-bit resolution, and sample at 625k samples per second at 14-bit resolution. The 16 onboard digital input channels sample at an overall rate of 1.66M words per second.
The 486 processor gives the DAP4200a low latency – down to a 0.2 ms task time quantum. This means that when low latency mode is enabled, a single task will run for no more than 0.2 ms before DAPL switches to another task. This is crucial for process control applications where data must be responded to as quickly as possible.
DAP 4200a/526 Specifications:
General Specifications |
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Dimensions |
12.28 inches x 4.2 inches |
Weight |
11.5 oz |
Power requirements |
+5V, 3.0 Amps |
Operating temperature |
0-50 degrees Celsius |
Accuracy of crystal clocks |
100 parts per million |
Type of A/D converter |
Successive Approximation |
Input |
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Analog Inputs |
16 |
Expandable to |
512 |
Voltage Ranges |
-0 to +5 volts, +/-2.5 volts, +/-5 volts, +/-10 volts |
Samples (x 1000) per second* |
769 |
Time increment (nanoseconds) |
100 |
Minimum time interval (microseconds)* |
1.30 |
Maximum Gain** |
500 |
A/D Converters / Resolution (bits) |
1/14 |
Digital Inputs (synchronous) |
16 |
Expandable to |
128 |
Samples (x 1000) per second |
1666 |
Minimum time interval (microseconds) |
0.6 |
Output |
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Analog Outputs |
2 |
Expandable to |
66 |
Voltage Ranges |
-0 to +5 volts, +/-2.5 volts, +/-5 volts, +/-10 volts, 0 to +10 volts |
Updates (x 1000) per second* |
833 |
Minimum time interval (microseconds)* |
1.2 |
DAC Resolution (bits) |
12 |
Digital Outputs |
16 |
Expandable to |
1024 |
Updates (x 1000) per second |
1666 |
Minimum time interval (microseconds) |
0.6 |
Microprocessor |
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Processor |
486:DX4 |
Clock Speed(MHz) |
96 |
Onboard Operating System |
DAPL 2000 |
RAM (Mbytes) |
16 |
PC Interface Specifications |
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PC Interface |
PCI |
Samples (x1000) transferred per second*** |
1666 |
Samples (x1000) logged/second*** |
1666 |
DSP |
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Onboard DSP support |
Yes |
* To maintain full 14-bit resolution may require a lower sample rate when sampling more than one channel per ADC.
** Top sampling speeds are available only with gain=1. Gains of 10, 100, and 500 are also available.
*** Disk logging and data transfer rates vary with PC platform.
Obtain additional information from Technical Note 212: Technical Product Information for the DAP 4200a (25k PDF file).
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