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NI SCXI-1127, Руководство пользователя

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Using the SCXI-1127

This chapter discusses in detail the operation of the SCXI-1127. There are
two major modes of operation—operation as a multiplexer and operation
as a matrix. A third mode of operation, independent mode, allows you to
access advanced features of the SCXI-1127.

Operating as a Multiplexer/Scanner

You can configure the SCXI-1127 to operate as a multiplexer/scanner.
Using this mode of operation, you can configure channels in the scan in

three different ways—two-wire, one-wire, and/or four-wire channel
configurations. In all scanning modes, only one channel is closed at a time
in the multiplexer.

© National Instruments Corporation

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 User Manual

Содержание SCXI-1127

Страница 1: ...gineers and technicians on staff at our full service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized a We also offer credit for buy backs www artisantg com WeBuyEqu REMOTE...

Страница 2: ...CXI 1127 User Manual f w IIIWNATIONAL r INSTRUMENTS...

Страница 3: ...S O C I T m SCXI 1127UserManual 32 ChannelHigh VoltageMultiplexer MatrixModule 1I w NATIONAL r INSTRUMENTS January1999Edition PartNumber322149A 01...

Страница 4: ...88 3336 Canada Ontario 905 785 0085 Canada Quebec 514 694 8521 Denmark 45 76 26 00 Finland 09 725 725 I I France 01 48 14 24 24 Germany 089 741 31 30 Hong Kong 2645 3186 Israel 03 6120092 Italy 02 413...

Страница 5: ...CONSEQUENTIALDAMAGES EVENIFADVISEDOFTHEPOSSIBILITYTHEREOF This limitation of the liability of National Instruments will apply regardless of the form of action whether in contract or tort including neg...

Страница 6: ...ial area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense Notices to User Changes or modifications not expressly approved...

Страница 7: ...ata loss or a system crash This icon to the left of bold italicized text denotes a warning which advises you of precautions to take to avoid being electrically shocked bold B o l d text denotes the na...

Страница 8: ...cessing the SCXI 1127 through Other SCXI Modules Using a DAQ Device 1 16 Connecting the SCXI 1127 to an External DMM 1 18 Configuration and Self Test 1 20 Auto Detecting Modules 1 20 Manually Adding M...

Страница 9: ...ixF TechnicalSupportResources Glossary Index Figures Figure 1 1 I n s t a l l i n g the SCXI 1127 into an SCXI Chassis 1 3 Figure 1 2 4 Slot Single Chassis Installation 1 5 Figure 1 3 4 Slot Configura...

Страница 10: ...IN to Non Cabled Modules2 1 4 Figure 2 13 Cabling an External DMM2 1 5 Figure 2 14 D a i s y Chained for Handshaking2 1 6 Figure 2 15 Connecting an External DMM to an SCXI 1127 in an SCXI 2000 Series...

Страница 11: ...s for Four Wire ModeF 4 Figure D 4 SCXI 1127 Front Connector Pin Assignments to Create an 8x4 MatrixF 5 Tables Table 1 1 S C X I 11 2 7 Configuration 1 1 Table D 1 F r o n t Connector Signal Descripti...

Страница 12: ...ke resistive measurements such as those needed for thermistors and RTDs With the use of special terminal blocks the SCXI 1127 can become an 8x4 or 32x1 two wire matrix A complete list of possible conf...

Страница 13: ...e required to use the SCXI 1127 including installing the latest version of NI SWITCH After installing the software install the SCXI 1127 hardware and its accessories then configure and test the SCXI 1...

Страница 14: ...27 for use with SCXI chassis National Instruments DAQ devices and National Instruments DMMs InstallingtheSCXI 1127ModuleintotheSCXIChassis You need the following items to complete the installation SCX...

Страница 15: ...in the same manner as described in step 3 5 Secure all the SCXI 1127 modules to the SCXI chassis using both thumbscrews To finish installing your SCXI 1 127 follow one of the procedures in the appropr...

Страница 16: ...ne 5 8 Position HVAB Plug 8 HV8 BAN4 Cable Adapter test system Before you proceed with your connections make sure you turn off your SCXI chassis Single4 SlotChassisConfiguration Refer to Figure 1 2 an...

Страница 17: ...HVAB backplane adapters behind slots 1 and 2 if needed 3 Install the 8 position HVAB plugs to connect the HVAB backplane adapters as needed 4 Connect the HV8 BAN4 cable from the DMM to the HVAB conne...

Страница 18: ...9MD Cable 3 2 Slot HVAB Backplane 5 8 Position HVAB Plug 8 HV8 BAN4 Cable Adapter 9 8 Slot HVAB Backplane Adapter Single12 SlotChassisConfiguration Refer to Figure 1 4 and 1 5 to make connections in t...

Страница 19: ...2 2 Install additional 2 slot and1 slot HVAB backplane adapters behind slots 1 through 4 if needed 3 Install the 8 position HVAB plugs to connect the HVAB backplane adapters as needed 4 Connect the HV...

Страница 20: ...ion 1 2 slot and 12 slot multi chassis configuration You can also create larger configurations 4 Slotand4 SlotMulti ChassisConfiguration In addition to the items needed for a single chassis system you...

Страница 21: ...o 0 0 0 o C E o C E o C E R O O 0 0 0 1 0 0 0A U O H 0 0 0 0 0 0 0 0 0 0 0 E I 0 0 0 0 0 0 0 0 3 11 10 4 Slot SCXI Chassis Figure1 6 4 Slot to 4 Slot Multi ChassisConfigurationPartsLocatorDiagram 1 I...

Страница 22: ...s configured withless than four slots of the HVAB backplane adapter usethe right most available HVAB connector toextendto the next chassis In this instance right mostmeansthe slotclosesttoslot1when th...

Страница 23: ...Refer to Figure 1 7 to setup this multi chassis configuration O O 0 0 0 0 0 0 0 1 1 0 0 0 0 1 0 1 1 00 0 0 0 0 0 0 01 1 0 1 0 m o o 0 0 0 0 1 0 000 00 0 0 oCE 0 C ABO 11111111M MI A B C E 2 1 A B 2 A...

Страница 24: ...nications with all the chassis in the system If slot 4 is empty in the 4 slotchassis or slot 12isempty in the 12 slot chassis the chassis will not operate It is this module that you must specify in th...

Страница 25: ...0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 Moomomoononomonom 7 7 t i t 0 6 0 0 0 a t 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 T B E M I C o o g o o i...

Страница 26: ...stalled SCXI 1357 kit T w o 1 slot HVAB backplane adapters O n e 2 slot HVAB backplane adapter H V 8 to BAN4 cable T w o 8 position HVAB plugs SH9MD 9MD cable N I D M M 1 8 in flathead screwdriver Con...

Страница 27: ...rs behind slots 1 and 2 if needed 4 Install the 8 position HVAB plugs to connect the HVAB backplane adapters as needed 5 Connect the HV8 BAN4 cable from the DMM to the HVAB connector behind slot 4 6 Y...

Страница 28: ...358 according to the instructions found earlier in this chapter 2 Connect the MIO DIO cable adapter to the rear of a module that is not the SCXI 1127 module Secure the adapter to the SCXI chassis usin...

Страница 29: ...odule 14 HVAB Connector Figure1 9 Installing theSCXI 1127 withTwoDAQDevices ConnectingtheSCXI 1127toanExternalDMM You need the following items to complete this installation SCXI 2000 2400 chassis with...

Страница 30: ...BARE cable and a cable to connect the handshaking lines from the SCXI 1127 to the DMM Attach your HV8 BAN4 cable to the HVAB connector on the HVAB backplane adapter or connect your BAN2 BARE cable to...

Страница 31: ...s User Manual for further information For the SCXI 2000 you also need to selectthe Baud Rate and COM Port 4 Yo u now have the choice of auto detecting your modules or manually adding them depending on...

Страница 32: ...list of modules in the chassis by clicking the next to the Chassis icon 4 R i g h t click on the slot that is cabled to your device and select Insert For DAQ devices this is the slot cabled to the DAQ...

Страница 33: ...Always install the grounding screw If signal wires are connectedtothe module or terminal block dangerous voltages may exist even when the equipment is turned off Before you remove any installed termi...

Страница 34: ...dule National Instruments is NOT LIABLE FOR ANY DAMAGES OR INJURIES resulting from incorrect signal connections I f high voltages Z 30 V and 42 4 Vp 4 or 60 VDC are present YOU MUST CONNECT SAFETY EAR...

Страница 35: ......

Страница 36: ...ccess advanced features of the SCXI 1127 OperatingasaMultiplexer Scanner You can configure the SCXI 1127 to operate as a multiplexer scanner Using this mode of operation you can configure channels in...

Страница 37: ...C a b l e Strain Relief 4 O n e Wire Mode Channel Numbering 7 Scanner Advanced Output 1 0 Safety Ground Solder Lug SCANADVD Figure2 1 SCXI 1331 Signal Connections Depending on the input mode configura...

Страница 38: ...how to do this T wo WireChannelScanningConfiguration You canusethe SCXI 1127 as a 32 channel two wire differential multiplexer Figure 2 2 showsthe block diagram of the input switching structure in tw...

Страница 39: ...on using the SCXI 1331 terminal block The diagram shows the two wire terminal block connections for channels 2 5 24 and 27 Channel 2 measures a voltage source V1 The positive terminal of channel 2 is...

Страница 40: ...64 to 1 multiplexer is available through the OUTO and OUTO screw terminals on the SCXI 1331 You can also connect the output of the SCXI 1127 to the HVAB backplane using switch ABO to make the connecti...

Страница 41: ...e terminals or the common reference for the voltage source is wired to the 1_WIRE_LO_REF screw terminals The output of the multiplexer is available through the OUTO bus Resistance is measured at chann...

Страница 42: ...the OUT2 and OUT2 screw terminals on the SCXI 1331 You can also connect the EXCITATION and SENSE commons of the SCXI 1127 to the HVAB backplane Use switches ABO and AB2 to make this connection You ca...

Страница 43: ...bus If you are using this module with a high voltage backplane you need to close the ABO and AB2 switches to connect the EXCITATION and SENSE commons to the HVAB backplane Figure 2 7 shows an example...

Страница 44: ...gineers and technicians on staff at our full service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized a We also offer credit for buy backs www artisantg com WeBuyEqu REMOTE...

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