National Instruments NI PXI-7831R Custom Cabling

Chapter 1 Introduction

NI PXI-7831R User Manual 1-10 ni.com

Refer to Appendix B, Connecting I/O Signals, for more information on

using these cables and accessories to connect I/O signals to the PXI-7831R.

For the most up-to-date cabling options, refer to ni.com/catalog or call

the sales office nearest to you.

Custom Cabling

NI offers a variety of cables that you can use to connect signals to the

NIPXI-78 31R. If you need to develop a custom cable, NI provides a

generic un-terminated shielded cable that makes this task easier. The

Table 1-2. Cables and Accessories

Cable Cable Description Accessories

SH68-C68-S Shielded 68-pin VHDCI male

connector to female 0.050 series

D-type connector. The cable is

constructed with 34 twisted wire

pairs plus an overall shield.

Connects to the following standard

68-pin screw terminal blocks:

• SCB-68

• CB-68LP

• CB-68LPR

•TBX-68

NSC68-262650 Non-shielded cable connects from

68-pin VHDCI male connector to

two 26-pin female headers plus one

50-pin female header. The pinout of

these headers allows for direct

connection to 5B backplanes for

analog signal conditioning and SSR

backplanes for digital signal

conditioning.

26-pin headers can connect to the

following 5B backplanes for analog

signal conditioning:

• 5B08 (8-channel)

• 5B01 (16-channel)

50-pin header can connect to the

following SSR backplanes for digital

signal conditioning:

• 8-channel backplane

• 16-channel backplane

• 32-channel backplane

NSC68-5050 Non-shielded cable connects from

68-pin VHDCI male connector to

two 50-pin female headers. The

pinout of these headers allows for

direct connection to SSR

backplanes for digital signal

conditioning.

50-pin headers can connect to the

following SSR backplanes for digital

signal conditioning:

• 8-channel backplane

• 16-channel backplane

• 32-channel backplane

Contents

Main Page Important Information Warranty Copyright Trademarks Patents Compliance FCC/Canada Radio Frequency Interference Compliance Determining FCC Class FCC/DOC Warnings Class A Contents About This Manual Chapter 1 Introduction Chapter 2 Hardware Overview of the NI PXI-7831R Page About This Manual Conventions Reconfigurable I/O Documentation Related Documentation Introduction About the Reconfigurable I/O Devices Using PXI with CompactPCI What You Need to Get Started Getting Started with Windows 2000/XP Getting Started with the RT Module Overview of Reconfigurable I/O Reconfigurable I/O Concept Flexible Functionality User-Defined I/O Resources Device-Embedded Logic and Processing Reconfigurable I/O Architecture Page Reconfigurable I/O Applications Software Development FPGA Module RT Module Cables and Optional Equipment Custom Cabling Unpacking Safety Information Page Page National Instruments Corporation 2-1 NI PXI-7831R User Manual Hardware Overview of the NI PXI-7831R PXI/CompactPCI Bus Figure 2-1. NIPXI-7831R Block Diagram + Calibration DACs Analog Input Input Modes Input Range Connecting Analog Input Signals Types of Signal Sources Floating Signal Sources Ground-Referenced Signal Sources Input Modes Figure 2-4. Summary of Analog Input Connections Differential Connection Considerations (DIFF Input Mode) Differential Connections for Ground-Referenced Signal Sources Differential Connections for Nonreferenced or Floating Signal Sources Page Single-Ended Connection Considerations Single-Ended Connections for Floating Signal Sources (RSE Input Mode) Single-Ended Connections for Grounded Signal Sources (NRSE Input Mode) Common-Mode Signal Rejection Considerations Analog Output Connecting Analog Output Signals Digital I/O Connecting Digital I/O Signals Page Page PXI Trigger Bus PXI Local Bus Switch Settings Power Connections Field Wiring Considerations Page Calibration Loading Calibration Constants Internal Calibration External Calibration A Specifications Analog Input Input Characteristics Accuracy Information DC Transfer Characteristics Dynamic Characteristics Analog Output Output Characteristics Accuracy Information DC Transfer Characteristics Voltage Output Dynamic Characteristics Digital I/O Reconfigurable FPGA Calibration Bus Interface Power Requirement Physical Maximum Working Voltage Environmental Safety Electromagnetic Compatibility CE Compliance B Connecting I/O Signals Page Appendix B Connecting I/O Signals National Instruments Corporation B-3 NI PXI-7831R User Manual Figure B-2. NIPXI-7831R I/O Connector Pin Assignments DIO Connector Pin Assignment MIO Connector Pin Assignment Caution Connections that exceed any of the maximum ratings of input or output signals Table B-1. I/O Connector Signal Descriptions Connecting to 5B and SSR Signal Conditioning Table B-2. NIPXI-7831R I/O Signal Summary Page Figure B-3. Connector Pinouts When Using NSC68-262650 Cable AO 07 Connector AI 07 Connector DIO 015 Connector Figure B-4. Connector Pinouts When Using the NSC68-5050 Cable DIO 023 Connector DIO 2439 Connector C Using the SCB-68 Shielded Connector Block Appendix C Using the SCB-68 ShieldedConnector Block NI PXI-7831R User Manual C-2 ni.com Quick Reference Label S5 S4 S1 Figure C-2. SCB-68 Quick Reference Label for the NIPXI-7831R Technical Support and Professional Services Page Glossary Numbers/Symbols A B C D Page I L M N O P R S T V W