multifunction-rio-user-manual.pdf - 第18页
Chapter 1 Introduction © National Instruments Corporation 1-9 Mult ifunction Reconfigurable I/O User Manual ships with a wire list id entifying the wires that co rrespond to each NI-78xx pin. You can use this cable to qu…
Chapter 1 Introduction
Multifunction Reconfigurable I/O User Manual 1-8 ni.com
Cables and Accessories
NI offers a variety of products you can use with NI 78xx devices, including
cables, connector blocks, and other accessories, as shown in Table 1-3.
Refer to Appendix A, Connecting I/O Signals, for more information
about using these cables and accessories to connect I/O signals to your
device. Refer to
ni.com/products or contact the sales office nearest to
you for the most current cabling options.
Custom Cabling
NI offers a variety of cables for connecting signals to your device. If you
need to develop a custom cable, a nonterminated shielded cable is available
from NI. The SHC68-NT-S connects to the NI 78xx VHDCI connectors on
one end of the cable. The other end of the cable is not terminated. This cable
Table 1-3. Connectivity Options
Cable
Connector
Accessory DescriptionNI 781x
NI 783x/
784x/785x
SHC68-68-RMIO
(NI Recommended)
— 0 SCB-68 High-performance shielded cable
wired specifically for signal
connection from the RMIO
connector
*
to the SCB-68 terminal
block to provide higher signal
integrity and noise immunity.
SHC68-68-RDIO
(NI Recommended)
0, 1, 2, 3 1, 2
†
SCB-68 High-performance shielded cable
wired specifically for signal
connection from the
RDIO connector
*
to the SCB-68
terminal block to provide higher
signal integrity and noise immunity.
SH68-C68-S 0, 1, 2, 3 1, 2
†
SCB-68 Basic shielded cable for signal
connection from the RMIO or
RDIO connector to the SCB-68
terminal block for noise reduction.
*
For a diagram of the twisted pairs in the SHC68-68-RMIO and SHC68-68-RDIO cables and the signals to which they
correspond, go to
ni.com/info and enter the info code rdrmio.
†
PCI/PXI-7830 does not have Connector 2.
Chapter 1 Introduction
© National Instruments Corporation 1-9 Multifunction Reconfigurable I/O User Manual
ships with a wire list identifying the wires that correspond to each NI-78xx
pin. You can use this cable to quickly connect the NI 78xx signals that you
need to the connector of your choice. Refer to Appendix A, Connecting I/O
Signals, for the NI 78xx connector pinouts.
© National Instruments Corporation 2-1 Multifunction Reconfigurable I/O User Manual
2
Hardware Overview
of the NI 78xx
This chapter presents an overview of the hardware functions and
I/O connectors on the Reconfigurable I/O (RIO) devices.
Figure 2-1 shows a block diagram for the NI 781x. Figure 2-2 shows a
block diagram for the NI 7830. Figure 2-3 shows a block diagram for the
NI 7831/7833/784x/785x.
Figure 2-1. NI 781x Block Diagram
Configuration
Configuration Control
Connector 0 (DIO)Connector 1 (DIO)Connector 2 (DIO)Connector 3 (DIO)
Digital I/O (40)
User-Configurable
FPGA on
RIO Devices
Digital I/O (40)
Digital I/O (40)
Digital I/O (40)
Data/Address/Control
Bus
Interface
Address/Data
Control
Flash Memory
PCI/PXI/CompactPCI Bus
RTSI/PXI Triggers
PXI Local Bus (NI PXI-781x Only)
RTSI Bus