National Instruments SCXI 1346 Manuale utente

LabVIEW™, Measure™, National Instruments™,ni.com

™, PXI™, and SCXI™are trademarks of National Instruments Corporation. Product and company

names mentioned herein are trademarks or trade names of their respective companies.

INSTALLATION GUIDE

SCXI -1346 SHIELDED MULTI-CHASSIS

CABLE ADAPTER

This guide describes how to connect and configure a multi-chassis

SCXI system using the SCXI-1346 shielded multi-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 the adapter, labeled

TO NEXT CHASSIS

• A 68-pin male connector on the front panel of the adapter, labeled

FROM DAQ BOARD OR PREVIOUS CHASSIS

• A 50-pin, male breakout connector on the printed-circuit board of the

adapter

• A 50-pin, bracket-mounted female connector on the rear of the adapter

™

SCXI-1346 Shielded Multichassis Cable Adapter 2 ni.com

Figure 1. Front of SCXI-1346

Figure 2. Rear of SCXI-1346

Note The SCXI-1346 covers the rear connector of two modules. The module to the right

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

©National Instruments Corporation 3 SCXI-1346 Shielded Multichassis Cable Adapter

What You Need to Get Started

To set up and use your SCXI-1346 in a multi-chassis system, you need the

following items:

❑Computer

❑SCXI-1346 Shielded Multi-Chassis Cable Adapter Installation Guide

❑One 68-pin, E Series DAQ device

❑SCXI-1001 or SCXI-1000 (revision K or higher) chassis—nnumber

of chassis up to a maximum of eight

❑At least one SCXI module per chassis (excluding the SCXI-1127,

SCXI-1190, and SCXI-1191)

❑SCXI-1349 shielded 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 chassis. Once the device is

installed according to the DAQ Quick Start Guide shipped with the device,

you need to test the device to make sure it is functioning correctly.

1. Double-click the Measurement & Automation Explorer (MAX)

icon on your desktop.

2. Expand Devices and Interfaces by left-clicking the +symbol.

SCXI-1346 Shielded Multichassis Cable Adapter 4 ni.com

3. Right-click on the name of your device and choose Properties. This

brings up a window that displays the device number and the resources

the DAQ device is using.

Figure 3. Properties Window in MAX

4. Left-click the Test Resources button in the properties window.

The following dialog box 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 the power off in each chassis and unplug all of the SCXI-1000

and SCXI-1001 chassis.

2. Identify which SCXI modules to install in each chassis.

©National Instruments Corporation 5 SCXI-1346 Shielded Multichassis Cable Adapter

3. Within each SCXI chassis, identify the appropriate SCXI module to

connect to each cable adapter. Pair the cable adapter with the first

module that appears in the list below. Repeat this pairing for each

chassis.

a. SCXI-1140, SCXI-1520, SCXI-1530, or SCXI-1531

b. SCXI-1100 to SCXI-1123

c. SCXI-1125 to SCXI-1159 (except the SCXI-1127, SCXI-1128,

SCXI-1129, and SCXI-1140)

d. SCXI-1540

e. SCXI-1160 to SCXI-1179

f. SCXI-1124

Note It is important that you connect the adapter to modules from the list if they are

available. If your chassis has none of the modules listed, connect the adapter to any

remaining module.

4. For each module that has internal jumpers or DIP switches, set the

jumpers or DIP switches for that module according to the instructions

in the user manual provided with the module.

5. Insert the modules 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

After matching the correct modules in each chassis with the cable adapters

in the Installing Modules in Your SCXI Chassis section, connect the

multi-chassis system.

To connect the multi-chassis system, you must use one SCXI-1346

multi-chassis adapter for every chassis in the chain except the chassis

furthest from the DAQ device. The last chassis uses the SCXI-1349 cable

adapter.

1. Install the SCXI-1346 multi-chassis adapter by mating the 50-pin

female connector on the rear of the SCXI-1346 with the 50-pin

male connector on the rear of the appropriate SCXI module.

(The appropriate module was determined in step 3 of Installing

Modules in Your SCXI Chassis, located earlier in this guide.)

SCXI-1346 Shielded Multichassis Cable Adapter 6 ni.com

2. Using the four screws provided with the SCXI-1346 multi-chassis

adapter kit and a flathead screwdriver, fasten the multi-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

©National Instruments Corporation 7 SCXI-1346 Shielded Multichassis Cable Adapter

4. Install the SCXI-1349 chassis adapter into the last SCXI chassis in

the chain. Mate the 50-pin female connection on the rear of the

SCXI-1349 with the 50-pin male connector on the rear of the

appropriate SCXI module. (The appropriate module was determined

instep3oftheInstalling Modules in Your SCXI Chassis section

earlier in this document.)

5. Using the two screws provided with the SCXI-1349 chassis adapter,

fasten 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 nlabeled FROM DAQ BOARD OR PREVIOUS

CHASSIS.

7. Connect a 68-pin shielded cable to the SCXI-1346 in chassis nlabeled

TO NEXT CHASSIS.

8. Connect the other end of the cable to the SCXI-1346 in chassis ID n+1

labeled FROM DAQ BOARD OR PREVIOUS CHASSIS.

9. Repeat steps 7 and 8 for the remaining chassis until you reach the last

chassis.

10. Connect the 68-pin shielded cable to the next to the last chassis in the

slot labeled TO NEXT CHASSIS.

11. Connect the other end of the cable to the SCXI-1349 in the last chassis.

SCXI-1346 Shielded Multichassis Cable Adapter 8 ni.com

Figure 6. Complete SCXI Multi-Chassis System

Setting the Chassis Address

Select a unique address for each chassis in the system. Select the addresses

in ascending order, starting 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 SCXI-1349 Cable Adapter

©National Instruments Corporation 9 SCXI-1346 Shielded Multichassis Cable Adapter

Figure 7. Chassis Address Switches

SCXI-1000

POWER

RESET

SCXI

MAINFRAME

ADDRESS

SCXI-1346 Shielded Multichassis Cable Adapter 10 ni.com

Table 1 indicates the value each address switch represents when it is in

either the on or off position.

For example, if switch numbers 1 and 3 are set in the on position and the

others are not, the chassis address is 5.

1+0+4+0+0=5

After you have set a unique address for each chassis, plug in and turn on all

the chassis in the system, and replace the plastic cover 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 by left-clicking the +symbol.

You should see your DAQ device name and number in the list.

Table 1. Address Switch Number for Each Switch Position

Address

Switch Number On Position Off Position

5 16 0

480

340

220

110

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