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PXI 总线技术

PXI 总线技术. Overview. PXI/CompactPCI Architecture Mechanical Electrical Software 3rd Party Support PICMG PXI Systems Alliance Configuring a PXI System Products and technology Applications. Modular Instrumentation for Mainstream Users. Filling the Gap. VXI. Price. Desktop PC.

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PXI 总线技术

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  1. PXI总线技术

  2. Overview PXI/CompactPCI Architecture Mechanical Electrical Software 3rd Party Support PICMG PXI Systems Alliance Configuring a PXI System Products and technology Applications

  3. Modular Instrumentation for Mainstream Users Filling the Gap VXI Price Desktop PC Performance

  4. PXI Starts with CompactPCI CompactPCI puts PC technology in a small, rugged package by combining three standards: PCI bus Eurocardpackaging Better IEC Connectors CompactPCI

  5. Why use the PCI bus? • Wide Industry Support • Plug and Play capability • Thousands of software products • 32-bit data transfers at 33 MHz (132 Mbytes/sec) • PCI is a de facto standard

  6. Why use Different Connectors? Higher Pin Count Rugged and Reliable Integrated Shield Impedance Matched Most Importantly:MORE SLOTS! J2 J1

  7. Why use Eurocard Packaging? • Proven over decades of use in industrial applications (VME, VXI, etc.) • Defined by IEEE 1101 Standard • Readily available mechanical components • Excellent thermal properties • Modular, rugged, and compact

  8. 1 2 3 4 1 2 3 4 5 6 7 8 PC Motherboard =Controller + Backplane PC Motherboard with 4 PCI slots CompactPCI 8-slotBackplane CompactPCI EmbeddedController

  9. Full Size 6U Peripheral Sizes in PCI and CompactPCI PCI PXI/CompactPCI Half Size 3U PCI boards can be redesigned to fit in PXI/CompactPCI with littleor no electrical changes.

  10. PCI PXI Combines Standard Technologies CompactPCI

  11. The Open PXI System Specification The PXI system specification extends CompactPCI for Instrumentation. S Specification Revision 1.0 August 20, 1997 Software Mechanical Electrical

  12. Mechanical Extensions PXI improves reliability and interoperability with: • Mandatory Active Cooling • Temperature Testing and Ratings • System-level environmental specificationsfor EMC, shock, vibration, and humidity • Defined embedded controller location

  13. 64-bit PCI and J2 3U PXI Features PXI/CPCI J1 32-bit PCI PXI Reserved J5 PXI Reserved J4 6U PXI Reserved J3 PXI/CPCI 64-bit PCI and J2 PXI Features J1 32-bit PCI PXI/CompactPCI Form Factors All 3U cards work in 6U systems 6U Adapter Panel

  14. Software Extensions PXI speeds application development because: PXI Controllers MUST support a standard software framework by including a pre-loaded OS: Windows NT Windows 9x Peripherals modules MUST be supplied with a WIN32 Device Driver

  15. PXI and PC Software is Identical Operating systems and application software run unchanged on PXI systems Configuration tools recognize PXI modules as PCI devices “We ported from a desktop PC to PXI without changing any code" - Len Burczyk, Los Alamos National Laboratories

  16. Star Trigger 10 MHz CLK Local Bus Trigger Bus Electrical Extensions PXI timing and triggering improves performance: System Controller Peripheral Peripheral Peripheral Star Trigger Controller 132 Mb/s, 33 MHz, 32-bit Computer Bus

  17. PXI Leverages VXI Features Timing and Triggering Extensions in PXI and VXI Local Bus Triggers Clock Star Bus VXI 12 lines 8 TTL, 2 ECL 10 MHz ECL D-size only PXI 13 lines 8 TTL 10 MHz TTL 1 per slot

  18. Trigger Bus Synchronizes Modules PXI-6070E PXI-6533 NI 5102 Start Scan RTSI Oscillator Oscilloscope Multifunction I/O Digital I/O

  19. Instrumentation Extensions Electrical Software Mechanical Systems Components PXI Architecture Summary PXI Builds on CompactPCI to define complete Measurement and Automation Systems CompactPCI High Performance Connectors PCIbus EuroCard

  20. The CompactPCI Specification Body PCIIndustrialComputerManufacturersGroup Governs the core CompactPCI specification Focus is on telecommunications infrastructure Online product directory contains 100s of products Over 500 company members

  21. Systems Alliance The PXI Specification Body Charter of this group is to:- Promote PXI- Ensure Interoperability- Control the PXI Specification Focus is on end-user success in measurement and automation Over 50 company members

  22. Configuring Your PXI System 1. Choose your OS and application development software 2. Select your PXI chassis 3. Select a remote or embedded controller 4. Select your PXI modules 5. Select your accessories

  23. Step 1. Choose Your Software • Select a standard operating system • Windows NT • Windows 9x • Select a standard application programming interface • Graphical Programming: LabVIEW • Text-based Programming: Measurement Studio • Real-time program development: LabVIEW RT

  24. Step 2. Select your chassis Choose enough slots to allow room to grow 4 or 8 slot chassis Use MXI-3 for multichassis configurations Consider application requirements Portable or Embedded Bench top or Rack mount Integrated Signal Conditioning (SCXI) Combination chassis with PXI+SCXI

  25. PXI/CompactPCI Flexible Installation Options • For applications in: • Test and Measurement • Data Acquisition • Industrial Automation

  26. Step 3. Select Your Control Scheme Embedded controllers Most compact solution Modular = easy maintenance Pentium and Pentium III Class Remote MXI-3 controllers Short or long distance Fully transparent Low cost

  27. PCI-to-PCI Bridge Multisystem Extension InterfaceMXI-3 Architecture PCI CompactPCI Secondary 1.5 GHz SerialI/F MXI-3 SerialI/F MXI-3 PCI 1 High Speed Serial Link Primary PCI 0 Still Software Transparent!

  28. MXI-3 Configurations PCI to PXI/CompactPCI PXI/CompactPCI to PXI/CompactPCI Cabling:- Copper (up to 10 m)- Fiber Optic (up to 200 m)

  29. MXI-3 Demonstration Device Manager & MAX see PXI I/O modules w/o extra software Configuration tools work as if modules are plugged into the PC With a 640x480 Window, MXI-3 transfers image data at the maximum camera speed of >30 fps The 1.5 Gbit/s MXI-3 link can sustain data transfers at over 80 Mbytes/s - PXI Chassis - PXI MXI-3 Interface - PXI IMAQ Module - Video Camera - Other I/O Modules - Standard PC - PCI MXI-3 Module

  30. MXI-3 Benefits • More slots for PCs and PXI/CompactPCI • Very high performance serial link • Easy to integrate — software transparent • Short and L O N G distances • Low cost

  31. Step 4. Select Your I/O Modules Choose from over 50 NI Modules INSTRUMENTS: Oscilloscopes Digital Multimeters Arbitrary Waveform Generator Temperature Meter Switch Multiplexers Serial Data Analyzers MXI-2 Kits for VXI/VME DATA ACQ. & CONTROL RT Series Multifunction I/O Digital I/O Analog Output Image Acquisition Motion Control Counter/Timers INTERFACES: GPIB SCSI+Enet PCMCIA CAN + DeviceNET RS-232 RS-485

  32. PXI Modules Link to Other Standards MXI-3 Stand-alone Instrument PXI System VXI or VME MXI GPIB CompactPCI Modules Modules

  33. Third-party Modules Use online directories www.ni.com/pxi www.pxisa.org www.picmg.org Look for PXI module compliance data Environmental specifications Regulatory specifications Driver software support

  34. Step 5. Select Your Accessories Connectivity scheme Cabling Terminal blocks Direct front panel connection 3rd Party Receivers Signal Conditioning Chassis-based: SCXI External Mounting kits

  35. Summary PXI is a complete system specification that extends CompactPCI for Measurement and Automation PXI and CompactPCI are open specifications supported by numerous vendors Hundreds of products are available today for configuring PXI/CompactPCI systems

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