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

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

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

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

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

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

PC Motherboard =Controller + Backplane PC Motherboard with 4 PCI slots CompactPCI Embedded Controller CompactPCI 8-slot Backplane

Peripheral Sizes in PCI and CompactPCI PCI PXI/CompactPCI HalfSize 3U3U3U3U FullSize 6U6U6U6U PCI boards can be redesigned to fit in PXI/CompactPCI with little or no electrical changes.

PXI Combines Standard Technologies CompactPCI PCI

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

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

PXI/CompactPCI Form Factors All 3U cards work in 6U systems 64-bit PCI and PXI Features 3U3U PXI/CPCI J1 J2 32-bit PCI 6U6U PXI/CPCI J5 J4 J3 J2 J1 64-bit PCI and PXI Features 32-bit PCI PXI Reserved 6U Adapter Panel

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

PXI and PC Software is Identical Operating systems and application software run unchanged on PXI systems Configuration tools recognize PXI modules as PCI devices

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

Local BusTriggersClockStar Bus VXI12 lines8 TTL, 2 ECL10 MHz ECLD-size only PXI13 lines8 TTL10 MHz TTL1 per slot PXI Leverages VXI Features Timing and Triggering Extensions in PXI and VXI

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

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

P CI I ndustrial C omputer M anufacturers G roup Governs the core CompactPCI specification Focus is on telecommunications infrastructure Online product directory contains 100s of products Over 500 company members The CompactPCI 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 Systems Alliance The PXI Specification Body

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

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 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

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 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

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

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

Multisystem Extension Interface MXI-3 Architecture MXI-3 Serial I/F MXI-3 High Speed Serial Link 1.5 GHz Primary Secondary PCI-to-PCI Bridge Still Software Transparent! Serial I/F PCICompactPCI PCI 1 PCI 0

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

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

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

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

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

Third-party Modules Use online directories Look for PXI module compliance data Environmental specifications Regulatory specifications Driver software support Use online directories Look for PXI module compliance data Environmental specifications Regulatory specifications Driver software support

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 Connectivity scheme Cabling Terminal blocks Direct front panel connection 3rd Party Receivers Signal Conditioning Chassis-based: SCXI External Mounting kits

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