Measurement Computing 2000 Series Daqboar - Manual (Page 39)

DaqBoard/2000 Series & /2000c Series User’s Manual 10-18-02 Daq Systems and Device Overviews 1-13
DaqBoard/2002 & DaqBoard/2002c
40 6
DaqBoard/2002 and /2002c are high-speed, multi-function, plug-and-play data acquisition boards for PCI
and compact-PCI bus computers, respectively. They feature 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 into a PC.
A 100-pin connector on the boards provides access to all of the input and output signals. The boards
accommodate all I/O with one cable and one PCI [or compact-PCI] slot. The 100-pin I/O connector, P4, is
logically divided into three ports:
• P1 – Not used by DaqBoard/2002 or DaqBoard/2002c
• 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, timer outputs, and 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 digital/counter input data and digital output data to flow between the PC and the
DaqBoard/2002 or /2002c board without consuming CPU time.
DaqBoard/2002 and DaqBoard/2002c each supports a complement of trigger modes including:
• 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 readings [digital, or counter].
Six pre- and post-triggering modes are supported.
Other features of the DaqBoard/2002 and DaqBoard/2002c 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/2002 or the
DaqBoard/2002c.