National Instruments SCXI-1349 Manual de usuario
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Find the National Instruments SCXI-1349 at our website: Click HERE
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.
320722B-01 ©Copyright 1994, 2000 National Instruments Corp. All rights reserved. November 2000
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
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
1
3
2
4
©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
1
2
4
3
©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
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