National Instruments SCXI 1346 Скачать руководство пользователя страница 18

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SCXI-1346 Shielded Multichassis Cable Adapter

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Address each subsequent chassis in ascending order as

obn-1 !

! md

channels

where

is the number of external

SCXI chassis.

Figure 16.

Multi-Chassis PXI-1010/1011 with External SCXI System Addressing

Note

The internal SCXI chassis and the external SCXI chassis that is cabled directly to

the PXI DAQ device front connector both use

ob0

. In this case,

, uniquely specifies the

SCXI chassis with which communication takes place.

PXI-1010 or

PXI-1011 Chassis

Chassis

First External

SCXI Chassis

ob0 ! scy ! mdz !

channels

Address

ob0 ! scy+1 ! mdz !

channels

Second External

SCXI Chassis

ob1 ! scy+2 ! mdz !

channels

Last External

SCXI Chassis

obn-1 ! scy+n ! mdz !

channels

Содержание SCXI 1346

Страница 1: ...ti chassis cable adapter Introduction Using the SCXI 1346 you can connect a multi chassis SCXI system to your data acquisition DAQ device The SCXI 1346 connects any 68 pin E Series DAQ device excluding 61XXE devices to any SCXI module excluding the SCXI 1127 SCXI 1128 SCXI 1190 and SCXI 1191 The SCXI 1346 is a connector assembly with four connectors A 68 pin male connector on the front panel of th...

Страница 2: ... of the one directly connected to the SCXI 1346 cannot have an external cable inserted into its rear 50 pin connector 1 68 Pin Male Connector TO NEXT CHASSIS 2 68 Pin Male Connector FROM DAQ BOARD OR PREVIOUS CHASSIS 1 50 Pin Bracket Mounted Female Connector 2 50 Pin Male Breakout Connector TO NEXT CHASSIS FROM DAQ BOARD OR PREVIOUS CHASSIS SCXI 1346 SHIELDED MULTI CHASSIS ADAPTER TOP 1 2 1 2 ...

Страница 3: ...lded cable assembly cable adapter and cable SCXI 1346 shielded multi chassis cable adapters n 1 up to a maximum of seven adapters 68 pin shielded cables n 1 up to a maximum of seven cables Small flathead screwdriver Note You must not exceed 10 m of total cable length in a multi chassis SCXI system for reliable operation Testing the Data Acquisition Device An E Series DAQ device controls the SCXI c...

Страница 4: ... should appear Figure 4 Successful Test Window Note If the dialog box shown in Figure 4 does not appear refer to the National Instruments website ni com support for troubleshooting tips The device must pass the resources test before you can continue configuring your SCXI system Installing Modules in Your SCXI Chassis The following steps prepare each chassis for integration into the system 1 Turn t...

Страница 5: ... into the appropriate chassis and secure them 6 Determine the order of each chassis in the multi chassis system starting with the chassis that is connected directly to the DAQ device The chassis cabled directly to the DAQ device is referred to as chassis ID n where n 1 with each successively cabled chassis referred to as chassis ID n 1 chassis ID n 2 and so on Connecting the Multi Chassis System A...

Страница 6: ...i chassis adapter to the rear of the SCXI chassis 3 Repeat steps 1 and 2 for each SCXI chassis in the system excluding the last SCXI chassis in the chain Figure 5 SCXI 1346 Cable Assembly 1 SCXI 1000 or SCXI 1001 Chassis 2 SCXI 1346 Cable Adapter 3 Shielded Cable Connecting to TO NEXT CHASSIS 4 Shielded Cable Connecting to FROM DAQ BOARD OR PREVIOUS CHASSIS FUSE PULL 1 3 2 4 ...

Страница 7: ...the adapter to the rear of the SCXI chassis 6 Connect either end of one 68 pin shielded cable to the DAQ device Connect the other end of the 68 pin shielded cable to the SCXI 1346 in chassis ID n labeled FROM DAQ BOARD OR PREVIOUS CHASSIS 7 Connect a 68 pin shielded cable to the SCXI 1346 in chassis n labeled TO NEXT CHASSIS 8 Connect the other end of the cable to the SCXI 1346 in chassis ID n 1 l...

Страница 8: ...ing with the chassis cabled directly to the DAQ device chassis ID n The chassis address is determined by setting the address switches in a specific on off pattern To view these switches remove the small plastic cover from the front of the SCXI chassis 1 68 Pin E Series DAQ Device 2 SCXI 1000 or SCXI 1001 Chassis 3 Shielded Cable Connected to SCXI 1346 Cable Adapter 4 Shielded Cable Connected to SC...

Страница 9: ... National Instruments Corporation 9 SCXI 1346 Shielded Multichassis Cable Adapter Figure 7 Chassis Address Switches SCXI 1000 POWER RESET SCXI MAINFRAME 5 4 3 2 1 ADDRESS 5 4 3 2 1 ON ADDRESS ...

Страница 10: ...on the address switches Configuring the Multi Chassis SCXI System Once the system is connected and you have assigned addresses to each chassis you need to configure and verify each chassis using MAX Note Make sure all the SCXI chassis are turned on MAX does not recognize unpowered SCXI chassis 1 Double click the Measurement Automation Explorer icon on your desktop 2 Expand Devices and Interfaces b...

Страница 11: ...onal Instruments website ni com support for troubleshooting tips 3 Insert a new SCXI chassis SCXI 1001 or SCXI 1000 under Devices and Interfaces by right clicking over Devices and Interfaces and selecting Create New from the menu This causes a window to appear with a list of devices and chassis types 4 From this list choose the SCXI chassis type that is cabled directly to the DAQ device ...

Страница 12: ...chassis address Choose the lowest chassis ID available The lowest chassis ID available is 1 if no other SCXI chassis are currently configured For each subsequently cabled SCXI chassis choose chassis ID values in ascending order from n 6 Set the chassis address to the number that you set on the address switches on the particular SCXI chassis Click Next ...

Страница 13: ...ation 13 SCXI 1346 Shielded Multichassis Cable Adapter Figure 10 Setting the Chassis ID and Address 7 Choose Yes to allow the software to automatically detect the modules in the chassis Click Next Figure 11 Auto Detecting Modules ...

Страница 14: ...with the SCXI chassis and click Next Figure 12 Selecting the DAQ Device 9 The next window shows the modules that were detected in the SCXI chassis From the list select the module that is cabled to the SCXI chassis cable adapter Selecting this module allows it to control the SCXI chassis Figure 13 Selecting the Correct Module ...

Страница 15: ...ith a PXI 1010 or PXI 1011 combination chassis cable the SCXI chassis directly to the 68 pin connector located on the front of the PXI DAQ device that controls the internal SCXI chassis as shown in Figure 15 If you are using more than one external SCXI chassis daisy chain the SCXI chassis as shown in Figure 15 and configure them as outlined in Configuring the Multi Chassis SCXI System with the fol...

Страница 16: ... systems that use external SCXI chassis in conjunction with PXI 1010 or PXI 1011 combination chassis SCXI Chassis Systems For LabVIEW Measure Visual Basic and the MAX Test Panel the channel string determines the sequence in which SCXI channels are scanned In LabVIEW an array of these channel strings configures multiple modules in the scan list When the application program runs the channel string i...

Страница 17: ...ed The last parameter channels is the list of channels that are scanned for module z It can have several formats obx scy mdz n where n is a single channel obx scy mdz n1 n2 where n1 and n2 represent a sequential list of input channels inclusive obx scy mdz n1 n2 n3 n4 n1 n5 n2 where n1 n2 and n5 represent single channels not necessarily sequential and n3 and n4 represent the endpoints of a sequent...

Страница 18: ...essing Note The internal SCXI chassis and the external SCXI chassis that is cabled directly to the PXI DAQ device front connector both use ob0 In this case scy uniquely specifies the SCXI chassis with which communication takes place PXI 1010 or PXI 1011 Chassis Chassis First External SCXI Chassis ob0 scy mdz channels Address ob0 scy 1 mdz channels Second External SCXI Chassis ob1 scy 2 mdz channel...

Страница 19: ......

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