National Instruments Documentation - NI
USER MANUALPXIe-6674PXI Express Timing and Synchronization ModuleThe PXIe-6674 timing and synchronization module enables you to pass PXI timing and triggersignals between PXI Express chassis without using the chassis' system timing slot. ThePXIe-6674 can generate and route clock signals between devices in multiple chassis, providinga method to synchronize multiple devices in a multichassis PXI Express system.This manual describes the electrical and mechanical aspects of the PXIe-6674 and containsinformation concerning its operation and programming.National Instruments DocumentationThe PXIe-6674 User Manual is one piece of the documentation set for your measurementsystem. You could have any of several other documents describing your hardware andsoftware. Use the documentation you have as follows: Measurement hardware documentation—This documentation contains detailedinformation about the measurement hardware that plugs into or is connected to thecomputer. Use this documentation for hardware installation and configurationinstructions, specifications about the measurement hardware, and application hints. Software documentation—Refer to the NI-Sync Help, available at ni.com/manuals.You can download NI documentation from ni.com/manuals.Related DocumentationThe following documents contain information that you might find helpful as you read thismanual: PICMG 2.0 R3.0, CompactPCI Core Specification, available from PICMG atwww.picmg.org. PXI Specification, Revision 2.1, available from www.pxisa.org. NI-VISA User Manual, available form ni.com/manuals. NI-VISA Help, included with the NI-VISA software. NI-Sync User Manual, available from ni.com/manuals.ContentsIntroduction. 2What You Need to Get Started.2Unpacking. 3
Software Programming Choices. 3Safety Information. 3Installing and Configuring. 5Installing the Software. 5Installing the Hardware. 5Configuring the Module.6Hardware Overview. 6PXIe-6674 Front Panel and LED. 8Active LED. 10Hardware Features. 10Generating and Routing Clocks. 12Routing Trigger Signals. 14Choosing the Type of Routing. 21Calibration.25Factory Calibration. 25Compliance. 25Electromagnetic Compatibility Information. 25Legal Information. 26Limited Warranty. 26Copyright. 28Trademarks.28Patents. 29Export Compliance Information. 30WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS. 30IntroductionThe PXIe-6674 timing and synchronization module enables you to share clocks and triggersbetween modules in a PXI Express chassis and other PXI chassis or non-PXI systems. This isdone without using the system timing slot in your PXI Express chassis. The PXIe-6674module generates and routes clock signals between devices in multiples chassis, providing amethod for synchronizing multiple devices in a PXI Express system.What You Need to Get StartedTo set up and use the PXIe-6674, you need the following items: PXIe-6674 Timing and Synchronization Module PXIe-6674 User Manual NI-Sync software. One of the following software packages and documentation:–LabVIEW–LabWindows /CVI –Microsoft Visual C (MSVC) PXI EMC filler panels, National Instruments part number 778700-01 PXI Express chassis PXI Express embedded controller or a desktop computer connected to the PXI Expresschassis using MXI-Express hardware.2 ni.com PXIe-6674 User Manual
UnpackingThe PXIe-6674 is shipped in an antistatic package to prevent electrostatic damage to themodule. Electrostatic discharge (ESD) can damage the module.Caution Never touch the exposed pins of connectors.To avoid such damage in handling the module, take the following precautions: Ground yourself using a grounding strap or by touching a grounded object. Touch the antistatic package to a metal part of the computer chassis before removing themodule from the package.Remove the module from the package and inspect the module for loose components or anysign of damage. Notify NI if the module appears damaged in any way. Do not install adamaged module into the computer.Store the PXIe-6674 in the antistatic envelope when not in use.Software Programming ChoicesWhen programming the PXIe-6674, you can use NI application development environment(ADE) software such as LabVIEW or LabWindows/CVI, or you can use other ADEs such asVisual C/C .LabVIEW features interactive graphics, a state-of-the-art interface, and a powerful graphicalprogramming language. The LabVIEW Data Acquisition VI Library, a series of virtualinstruments for using LabVIEW with National Instruments DAQ hardware, is included withLabVIEW.LabWindows/CVI is a complete ANSI C ADE that features an interactive user interface, codegeneration tools, and the LabWindows/CVI Data Acquisition and Easy I/O libraries.Safety InformationThe following section contains important safety information that you must follow wheninstalling and using the product.Do not operate the product in a manner not specified in this document. Misuse of the productcan result in a hazard. You can compromise the safety protection built into the product if theproduct is damaged in any way. If the product is damaged, return it to National Instruments forrepair.Do not substitute parts or modify the product except as described in this document. Use theproduct only with the chassis, modules, accessories, and cables specified in the installationinstructions. You must have all covers and filler panels installed during operation of theproduct.Do not operate the product in an explosive atmosphere or where there maybe flammable gasesor fumes. If you must operate the product in such an environment, it must be in a suitably ratedenclosure.PXIe-6674 User Manual National Instruments 3
If you need to clean the product, use a soft, nonmetallic brush. The product must becompletely dry and free from contaminants before you return it to service.Operate the product only at or below Pollution Degree 2. Pollution is foreign matter in a solid,liquid, or gaseous state that can reduce dielectric strength or surface resistivity. The followingis a description of pollution degrees. Pollution Degree 1 means no pollution or only dry, nonconductive pollution occurs. Thepollution has no influence. Pollution Degree 2 means that only nonconductive pollution occurs in most cases.Occasionally, however, a temporary conductivity caused by condensation must beexpected. Pollution Degree 3 means that conductive pollution occurs, or dry, nonconductivepollution occurs that becomes conductive due to condensation.You must initiate signal connections for the maximum voltage for which the product is rated.Do no exceed the maximum ratings for the product. Do not install wiring while the product islive with electrical signals. Do not remove or add connector blocks when power is connectedto the system. Avoid contact between your body and the connector block signal when hotswapping modules. Remove power from signal lines before connecting them to ordisconnecting them from the product.Operate the product at or below the measurement category1 marked on the hardware label.Measurement circuits are subjected to working voltages2 and transient stresses (overvoltage)from the circuit to which they are connected during measurement or test. Measurementcategories establish standard impulse withstand voltage levels that commonly occur inelectrical distribution systems. The following is a description of measurement categories: Measurement Category I is for measurements performed on circuits not directlyconnected to the electrical distribution system referred to as MAINS voltage. Thiscategory is for measurements of voltages from specially protected secondary circuits.Such voltage measurements include signal levels, special hardware, and limited-energyparts of hardware, circuits powered by regulated low-voltage sources, and electronics. Measurement Category II is for measurements performed on circuits directly connectedto the electrical distribution system (MAINS3). This category refers to local-levelelectrical distribution, such as that provided by a standard wall outlet (for example, 115AC voltage for U.S. or 230 AC voltage for Europe). Examples of Measurement CategoryII are measurements performed on household appliances, portable tools, and similarhardware. Measurement Category III is for measurements performed in the building installation atthe distribution level. This category refers to measurements on hard-wired hardware suchas hardware in fixed installations, distribution boards, and circuit breakers. Otherexamples are wiring, including cables, bus bars, junction boxes, switches, socket outlets1234 Measurement categories, also referred to as overvoltage or installation categories, are defined inelectrical safety standard IEC 61010-1 and IEC 60664-1.Working voltage is the highest rms value of an AC or DC voltage that can occur across anyparticular insulation.MAINS is defined as a hazardous live electrical supply system that powers hardware. Suitablyrated measuring circuits may be connected to the MAINS for measuring purposes.ni.com PXIe-6674 User Manual
in the fixed installation, and stationary motors with permanent connections to fixedinstallations.Measurement Category IV is for measurements performed at the primary electricalsupply installation, typically outside buildings. Examples include electricity meters andmeasurements on primary overcurrent protection devices and on ripple control units.Installing and ConfiguringThis chapter describes how to install the PXIe-6674 hardware and software and how toconfigure the device.Installing the SoftwareRefer to the readme.htm file that accompanies the NI-Sync software for software installationdirections.Installing the HardwareThe following are general installation instructions. Consult the chassis user manual ortechnical reference manual for specific instructions and warnings about installing newmodules.1. Power off and unplug the chassis.2. Locate the desired slot in your PXI Express chassis. The PXIe-6674 can be placed in anyPXI Express slot, as indicated by the glyph in Figure 1. on page 5Figure 1. PXI Express Slot Indicator Glyph3.4.5.6.7.Remove the filler panel for the selected slot, if applicable.Ground yourself using a grounding strap or by touching a grounded object. Follow theESD protection precautions described in the Unpacking section of the Introduction.Carefully insert the PXIe-6674 into the slot, making sure to not scrape the module on anyadjacent modules. Use the injector/ejector handle to fully insert the module into thechassis.Screw the front panel of the device to the front panel mounting rail of the chassis.If adjacent slots are not populated, use EMC filler panels to cover the opening.Caution To ensure the specified EMC performance, you must install PXI8.9.EMC filler panels, National Instruments part number 778700-01, in all openchassis slots.Visually verify the installation. Ensure that the module is fully inserted into the slot.Plug in and power on the chassis.The PXIe-6674 is now installed.PXIe-6674 User Manual National Instruments 5
Configuring the ModuleThe PXIe-6674 is completely software configurable. The system software automaticallyallocates all module resources.The two LEDs on the front panel provide information about module status. The front paneldescriptions in the Hardware Overview describe the LEDs in greater detail.Hardware OverviewThis chapter presents an overview of the hardware functions of the PXIe-6674. Figure 2. onpage 7 provides a functional overview of the PXIe-6674 hardware.6 ni.com PXIe-6674 User Manual
Figure 2. Functional Overview of the PXIe-6674CLKINAC CoupledClock DetectorPXI CLK10PXIe CLK100ClockGenerationPXIe DSTARAPeripheralClock GenerationDriver/ComparatorPFI LVDS 0.2 PFI 0.5 CLKINPFI 0ThresholdDACCLK10CLOCK andTRIGGERRoutingPFI 1ThresholdDACPFI 2PFI 3PXIe DSTARBPeripheralPXIe DSTARCPeripheralPXI STARPeripheralPXI TRIG 0.7 LVDS Driver/ReceiverDriver/ComparatorPFI 2ThresholdDACPCI ExpressInterfaceDriver/ComparatorPCI ExpressPFI 1Driver/ComparatorCLK100PFI 0LVDS Driver/ReceiverPXI ExpressCLKOUTPFI 3ThresholdDACPFI 4PFI 5LVDS Driver/ReceiverDriver/ComparatorPFI 4ThresholdDACDriver/ComparatorPFI 5ThresholdDACPXIe-6674 User Manual National Instruments 7
PXIe-6674 Front Panel and LEDFigure 3. PXIe-6674 Front PanelNI PXIe-6674Timing Module12CLKOUT3CLKIN5PFI 0/LVDS0-PFI 1/LVDS0 PFI 2/LVDS1-4PFI 3/LVDS1 PFI 4/LVDS2PFI 5/LVDS2 1. Access LED2. Active LED3. CLKOUT Connector8 ni.com PXIe-6674 User Manual4. PFI 0.5 /PFI LVDS 0.2 Connectors5. CLKIN Connector
Table 1. Signal DescriptionsSignalDescriptionCLKINAC coupled, 50 Ω clock input. CLKIN can be routed to the FPGA for useas a synchronization clock.CLKOUTAC coupled clock output. CLKOUT can be sourced from the PXICLK10, Clock Generation, or from the PXIe DSTARA line.PFI or PFI LVDS Programmable Function Interface which can be individually configuredfor either single ended operation or LVDS operation. In LVDS mode, theconnectors are paired and can be programmatically set as either inputs oroutputs, but not both simultaneously.Caution Connections that exceed any of the maximum ratings of input or outputsignals on the PXIe-6674 can damage the module and the computer. NI is not liablefor any damage resulting from such signal connections.Table 2. Access LEDColorStatusOffModule is not yet functional.GreenDriver has initiated the module.AmberModule is being accessed. The Access LED flashes amber for 50 ms when themodule is accessed.Blinking Red Module has detected an over-temperature condition.Solid RedA hardware error has been detected.Caution If the Access LED is observed to be blinking red, the module has detectedan over-temperature condition. Continued use of the PXIe-6674 in this condition isnot recommended as product reliability may become compromised. Since severalcommon problems can cause an over-temperature condition, please investigate thefollowing: Check that all chassis covers, filler panels, and/or slot blockers are installed. Make sure that the chassis fan speed is set to the highest setting. If applicable, check that the chassis fan air intake is not blocked and that the fanfilters are clean. Make sure that the ambient temperature around the chassis isn't above the ratedtemperature specifications. If so, move the chassis to a cooler ambienttemperature location.PXIe-6674 User Manual National Instruments 9
Caution If the Access LED is observed to be solid red, a hardware failure has beendetected that may impact the performance of the PXIe-6674. Contact NationalInstruments for support.Active LEDYou can set the Active LED to amber.Tip Changing the Active LED color to amber is helpful when you want to identifydevices in a multichassis situation, or when you want an indication that yourapplication has reached a predetermined section of the code.Hardware FeaturesThe PXIe-6674 performs two broad functions. Generating clock and trigger signals. Routing internally or externally generated signals from one location to another.Table 3. on page 10 outlines the function and direction of the signals discussed in detail in theremainder of this chapter.Table 3. Signal DescriptionsSignal NameDirectionDescriptionPXI CLK10In (fromchassis)This signal is the PXI 10 MHz backplane clock. Thissignal is the output of the native 100 MHz oscillator in thechassis divided by ten.PXIe CLK100In (fromchassis)This signal is the PXI Express 100 MHz backplane clock.PXIe-CLK100 offers tighter slot to slot timing thanPXI CLK10.CLKINIn (fromfront panel)CLKIN is the signal connected to the SMA inputconnector of the same name. CLKIN is connected to theFPGA for use as a synchronization clock.CLKOUTOut (to frontpanel)CLKOUT is the signal on the SMA output connector ofthe same name. CLKOUT can be sourced from theOCXO, PXI CLK10, Clock Generation, or from thePXIe DSTARA network.Clock Generation Out(internal)10 ni.com PXIe-6674 User ManualClock Generation refers to the clock signal coming fromthe onboard clock generation circuitry of the PXIe-6674.The clock generation circuitry can generate a clock fromsub-1 Hz to 1 GHz with fine granularity and isautomatically locked in phase to PXIe CLK100.
Table 3. Signal Descriptions (Continued)Signal NamePFI 0.5 DirectionDescriptionIn/Out (to/from frontpanel)The single ended Programmable Function Interface (PFI)pins on the PXIe-6674 route timing and triggering signalsbetween multiple PXI Express chassis. A wide variety ofinput and output signals can be routed to or from the PFIlines.PFI LVDS 0.2 In/Out (to/from frontpanel)The LVDS Programmable Function Interface can be usedto route timing and triggering signals between multiplePXI Express chassis. The use of LVDS logic allows muchfaster speeds than can be achieved with the single endedPFIs. The LVDS PFIs, when used as outputs, can besourced from the PXIe DSTARA network, the FPGA, orthe clock generation circuitry. As inputs, the LVDS PFIscan be routed to the PXIe DSTARA network and to theFPGA.PXI TRIG 0.7 In/Out (to/The PXI trigger bus consists of eight digital lines sharedfrom chassis) among all slots in the PXI Express chassis. ThePXIe-6674 can route a wide variety of signals to and fromthese lines.Note PXI TRIG 0.5 are also known asRTSI 0.5 in some hardware devices andAPIs. However, PXI TRIG 6.7 are notident
PXIe-6674 Front Panel and LED Figure 3. PXIe-6674 Front Panel 1 2 3 5 4 Timing Module NI PXIe-6674 PFI 0/ LVDS 0-PFI 1/ LVDS 0 PFI 2/ LVDS 1-PFI 3/ LVDS 1 PFI 5/ LVDS 2 PFI 4/ LVDS 2-CLK OUT CLK IN 1. Access LED 2. Active LED 3. CLKOUT Connector 4. PFI 0.5 /PFI_LVDS 0.2 Connectors 5. CLKIN Connector
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