Measurement Computing DaqBoard 1000 Series - Manual (Page 29)

DaqBoard/1000
16 Analog
Input
2 Analog
Output
24 Digital
I/O
4 Counter
Inputs
2 Timer
Outputs
DaqBoard/1000 is a high-speed, multi-function, plug-and-play data acquisition board for PCI bus
computers. It features a 16-bit, 200-kHz A/D converter, digital calibration, bus mastering DMA, two
16-bit, 100-kHz D/A converters, 24 digital I/O lines, four counters, and two timers.
Up to four boards can be installed into a PC.
One 68-pin SCSI III connector on the board provides access to all of the input and output signals. The
DaqBoard/1000 accommodates all I/O with one cable and one PCI slot.
The 68-pin I/O connector is logically divided into three functions:
• Analog input for16 single-ended or 8 differential analog inputs with 7 software programmable bipolar
ranges (
±10 V to ±156 mV full scale).
• 24 lines of general purpose digital I/O.
• 4 counter inputs, 2 timer outputs, and 2 analog outputs.
The on-board scan sequencer lets you select up to 512 channel/range combinations. The sequencer scans
all channels of the scan at 5
µs or 10 µs/channel.
Bus mastering allows analog and digital/counter input data, as well as analog and digital output data, to
flow between the PC and the DaqBoard without consuming CPU time.
DaqBoard/1000 supports trigger modes that include:
• Digital and pattern triggering – The boards have separate digital trigger input line, allowing TTL-
level triggering and latencies less than 5
µs. The trigger can be programmed for logic level or edge
triggering. In pattern triggering, any of the digital input ports acts as the trigger port. You can program
the digital pattern.
• Software-based triggering – The PC detects the trigger event from analog, digital, or counter
readings. Six pre- and post-triggering modes are supported.
The two 16-bit, 100-kHz analog output channels have an output from –10 V to +10 V. Using Bus
Mastering DMA, each D/A can output a waveform.
Other features of the DaqBoard/1000 include:
•
24 TTL-level digital I/O lines. They are divided into three 8-bit ports.
• Four 16-bit counters. Each can accept frequency inputs up to 10 MHz. The counters can be cascaded
into two 32-bit counters.
• Two 16-bit timer outputs. Each can generate square waves from 16 Hz to 1 MHz.
• Configuration through software. There are no switches or jumpers on the DaqBoard/1000.
DaqBoard/1000 and /2000 Series User’s Manual 889094 Daq Systems and Device Overviews 1-7