National Instruments BNC-9920, Operating Instructions And Specifications

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OPERATING INSTRUCTIONS AND SPECIFICATIONS
BNC-9920
Connector Accessory for C Series Modules
This document describes how to install, configure, and use the BNC-9920 accessory with C Series
modules. This document also contains accessory specifications.
The BNC-9920 has the following features:
• Eight BNC connectors for analog input (AI) connection
• Onboard temperature reference
• Thermocouple connector
• Resistor measurement screw terminals
• Two BNC connectors for analog output (AO) connection
• Eight screw terminals with state indicators for digital I/O (DIO) connection
• 12 screw terminals for additional DIO connection
• One BNC connector for DIO connection
• Two user-defined BNC connectors
• A function generator with the following outputs:
– Frequency-adjustable, TTL-compatible square wave
– Frequency- and amplitude-adjustable sine wave or triangle wave
• Quadrature encoder
• A 68-pin I/O connector that connects to three C Series modules using the BNC-9920 cable
• Can be used on a desktop or mounted on a DIN rail
Contents
Conventions ......................................................................................................................................... 2
What You Need to Get Started ............................................................................................................ 2
Installing the BNC-9920 ...................................................................................................................... 2
Connecting Analog Input Signals ........................................................................................................ 4
Connecting Differential Analog Input Signals ............................................................................ 4
Measuring Floating Signals ................................................................................................. 5
Measuring Ground-Referenced Signals............................................................................... 5
Measuring Temperature ............................................................................................................... 6
Measuring Resistance .................................................................................................................. 6
Connecting Analog Output Signals ..................................................................................................... 7
Using the Function Generator.............................................................................................................. 7
Connecting User-Defined Signals ....................................................................................................... 7
Connecting Digital I/O Signals............................................................................................................ 8
Using the Quadrature Encoder..................................................................................................... 8
Specifications....................................................................................................................................... 9
Environmental Management........................................................................................................ 12
Where to Go for Support ..................................................................................................................... 13