Measurement Computing 2000 Series Daqboar - Manual (Page 45)

DaqBoard/2000 Series & /2000c Series User’s Manual 10-18-02 Daq Systems and Device Overviews 1-19
DaqBoard/2005 & DaqBoard/2005c
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40 6
DaqBoard/2005 and DaqBoard/2005c are high-speed, multi-function, plug-and-play data acquisition boards
for PCI and compact-PCI bus computers, respectively. They feature a 16-bit, 200-kHz A/D converter,
digital calibration, bus mastering DMA, 40 digital I/O lines, four counters, and two timers.
Up to 470 channels of analog and digital I/O can be accessed with one board. Up to four boards can be
installed in one PC.
A 100-pin connector on the board provides access to all of the input and output signals. The Each board
accommodates all I/O with one cable and one PCI [or compact-PCI] bus-slot, as applicable. The 100-pin
I/O connector, P4, is logically divided into three ports:
• P1 – Analog input port for 16 single-ended or 8 differential analog inputs with 13 software
programmable ranges (
±10 V to ±156 mV full scale).
• P2 – General purpose digital I/O port with 24 lines, or digital I/O expansion port controlling up to 192
external lines.
• P3 – 16-bit digital I/O port, counter inputs, and timer 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 per 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 board without consuming CPU time.
DaqBoard/2005 and DaqBoard/2005c support a full complement of trigger modes, including:
• Hardware analog triggering – A user-programmed trigger level sets an analog DAC, which is
compared in hardware to the analog input level on the selected channel. Trigger latency is < 5
µs.
• Digital and pattern triggering – Both boards have a 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 readings, either analog, digital, or
counter. Six pre- and post-triggering modes are supported.
Bus Mastering DMA also allows for digital pattern generation on the 16-bit high-speed digital I/O port.
Other features of the DaqBoard/2005 and DaqBoard/2005c include:
• 40 TTL-level digital I/O lines. They are divided into three 8-bit ports and one 16-bit port.
• 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/2005 or
DaqBoard/2005c.