National Instruments TBX-1329 AC/DC Installation Manual
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National Instruments TBX-1329 AC/DC Installation Manual

National Instruments TBX-1329 AC/DC Installation Manual

Coupling terminal block
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TBX-1329 AC/DC C
Introduction
What You Need to Get Started
SCXI ™ is a trademark of National Instruments Corporation. Product and company names are trademarks or trade names of their respective
companies.
321556A-01
OUPLING
This guide describes how to install and use the TBX-1329 AC/DC
coupling terminal block with the SCXI-1120, SCXI-1120D, and
SCXI-1121 modules.
The TBX-1329 is a DIN rail-mountable terminal block that consists of
a shielded board with screw terminals to connect to the SCXI-1120,
SCXI-1120D, or SCXI-1121 front connector. The TBX-1329 mounts
on most European standard DIN EN mounting rails.
The terminal block has 16 screw terminals that unplug for easy
connection. Two screws are provided to connect to the SCXI CHASSIS
GROUND via the SH32-32-A cable shield. With the SCXI-1120 and
SCXI-1120D, the remaining eight pairs of screw terminals connect
signals to the eight SCXI module input channels. With the SCXI-1121,
four pairs of screw terminals connect signals to the four SCXI module
input channels and four pairs connect to the SCXI module excitation
channels.
To set up and use your TBX-1329, you will need the following:
TBX-1329 AC/DC coupling terminal block
TBX-1329 AC/DC Coupling Terminal Block Installation Guide
1
/
in. flathead screwdriver (included in kit)
8
Your SCXI chassis and documentation
SCXI-1120, SCXI-1120D, or SCXI-1121 module and
documentation
© Copyright 1997 National Instruments Corp. All rights reserved.
T
ERMINAL
B
LOCK
September 1997

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Summary of Contents for National Instruments TBX-1329 AC/DC

  • Page 1 Your SCXI chassis and documentation SCXI-1120, SCXI-1120D, or SCXI-1121 module and documentation SCXI ™ is a trademark of National Instruments Corporation. Product and company names are trademarks or trade names of their respective companies. 321556A-01 © Copyright 1997 National Instruments Corp. All rights reserved.

  • Page 2: Installation

    O NOT SUBSTITUTE PARTS OR MODIFY EQUIPMENT danger of introducing additional hazards, do not install unauthorized parts or modify the device. Return the device to National Instruments for service and repair to ensure that its safety features are not compromised.
  • Page 3 Perform the following steps to mount the SH32-32-A cable assembly and connect the TBX-1329 to your SCXI module. Refer to the figures as needed. 1. Turn off your SCXI chassis. 2. Turn off the computer that contains your data acquisition (DAQ) device or disconnect the device from your SCXI chassis.
  • Page 4 1 Grounding Screw Lock Washers from Cable Assembly 2 Nuts from Cable Assembly Jack Screws from Cable Assembly Figure 2. Preparing the SCXI Module for the Cable Assembly 11. Slide the SCXI module back into place in the SCXI chassis. 12.
  • Page 5 1 Backshell Mounting Screw Backshell 2 Backshell Mounting Ear SH32-32-A Cable Figure 3. Connecting the SH32-32-A Cable to the SCXI Module 14. Connect the other end of the cable assembly to your TBX-1329 terminal block connector and secure the SH32-32-A cable by tightening both backshell mounting screws.
  • Page 6 1 Backshell Mounting Screws and Ears 3 Captive Cover Screws 5 Signal Wire Entry 2 Safety Ground Solder Lugs 4 Terminal Block Connector Note: The SH32-32-A cable is not shown in the exact position for proper connection to the terminal block connector.

  • Page 7: Rack Mounting

    Rack Mounting When you have completed the installation, you are ready to mount the TBX assembly in your rack. If you are using the National Instruments TBX Rack-Mount Assembly, refer to the TBX Rack-Mount Installation Guide for instructions. If you are not using this rack-mount assembly, perform the following steps to mount the TBX assembly directly onto your DIN rail.
  • Page 8 When using the terminal block with high-voltage levels, you must insulate all signal wires appropriately to the highest voltage the terminal block may come in contact with. National Instruments is not liable for any damages or injuries resulting from inadequate signal wire insulation.

  • Page 9: Current Measurement

    To determine the amount of error introduced by the cable, do the following: 1. Calculate the total resistance (R ) of the cable based on the cable length. 2. Refer to your strain gauge data sheet for the bridge resistance of your strain gauge (R ) connected at the TBX-1329.
  • Page 10 Table 1. Socket Assignments per Channel Channel Number Resistor Designator...

  • Page 11: Wiring Instructions

    To connect the safety earth ground to the safety ground solder lug, run an earth ground wire in the cable from the signal source to the terminal block. National Instruments is liable for any damages or injuries resulting from inadequate safety earth ground connections.
  • Page 12 2. Connect the signal wires to the screw terminals: Prepare your signal wire by stripping the insulation no more than 7 mm. b. Connect the signal wires to the screw terminals by inserting the stripped end of the wire fully into the terminals. Tighten the terminals to a torque of 5–7 in.-lb (56–79 Newton cm).
  • Page 13 The installation and signal connection are now complete. Current Loop Receiver Resistor Serial Number SC4/SR4 SC0/SR0 Safety Ground Solder Lugs SC7/SR7 10 SC3/SR3 SCXI Module-Type Product Name SC6/SR6 11 SC2/SR2 Rows Assembly Number SC5/SR5 12 SC1/SR1 Figure 6. TBX-1329 Parts Locator Diagram...
  • Page 14 AC/DC Coupling Configuration Each channel of the TBX-1329 has two switches you can use to switch from AC to DC; thus, each channel can be configured individually. The factory-default setting for the switches is the DC position so that the terminal block will pass all signals, DC and AC, to the SCXI module.

  • Page 15: Cleaning Instructions

    Storage ..........-55° to 150° C Relative humidity ......5% to 90% at 35° C noncondensing National Instruments Customer Support If you have additional questions, please contact our technical support staff at: Tel: (512) 795-8248, Fax: (512) 794-5678. Our corporate headquarters address is: 6504 Bridge Point Parkway, Austin, TX 78730-5039, Tel: (512) 794-0100.

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