National Instruments RT Series - Manual (Page 20)

Chapter 3 Hardware Overview
RT Series 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
with some 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
manual for 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 to the DAQ section of the LabVIEW Help, available
by selecting Help»Contents and Index in LabVIEW, 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
where it resides through shared memory on the 7030 processor board. Both
the host computer 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
downloading software 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 system integration (RTSI) bus directly connects DAQ
devices for precise synchronization of functions. The RT Series DAQ
devices provide all RTSI functionality. The RTSI bus allows you to
connect RT Series DAQ devices to any other DAQ device regardless of
whether the other device is an RT Series device or standard DAQ device.
The RTSI 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 device and a RTSI cable available from
National Instruments. Refer to your daughterboard user manual for