Chapter3 HardwareOverview
RTSeries DAQ Device User Manual 3-4 ni.com
DAQ Daughterboard
The daughterboard in the RT Series system provides the DAQ
functionality. Each daughterboard is a National Instruments DAQ device
withsome mechanical modifications to allow it to connect to the processor
board.You can expect the same high performance and specifications from
the daughterboard that you do from the standard version of the device.
For example, the PCI/PXI-7030/6040E boards have the same DAQ
characteristics as the PXI-6040E. Refer to the appropriate daughterboard
manualfor specifications, cabling requirements, and accessory
information.Table 1-1, RT Series DAQ Device and Corresponding DAQ
Device Manual, lists the corresponding manual for each available
daughterboard.Refer t o the DAQ section of the LabVIEW Help, available
by selecting HelpยปContentsand Index in LabV IEW, for more
information about hardware and software configuration.
Host to RT Series DAQ Device Communication
The computer where you install the RT Series DAQ device is the host
computer.The RT Series DAQ device communicates to the host computer
whereit resides through shared memory on the 7030 processor board. Both
the hostcomputer and the embedded processor have access to the shared
memory. The memory is allocated for various tasks. For example, the RT
Development System on the host uses part of the shared memory for
downloadingsoftware to the device. Some memory space also is allocated
to the user for passing data between the host computer and the processor
board.
RTSI
The real-time systemintegration (RTSI) bus directly connects DA Q
devicesfor precise synchronization of functions. The RT Series DAQ
devices provide all RTSI functionality. The RTSI bus allows you to
connectRT Series DAQ devices to any other DAQ device regardless of
whetherthe other device is an RT Series device or standard DAQ device.
TheRTSI connections are made across the PXI trigger bus for the PXI RT
Series devices.For PCI RT Series devices, the connection is made with a
connector on the top edge of the deviceand a RTSI cable available from
National Instruments. Refer to your daughterboard user manual for