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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:
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Frequency-adjustable, TTL-compatible square wave
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Frequency- and amplitude-adjustable sine wave or triangle wave
•
Quadrature encoder
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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
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Table of Contents
Related Manuals for National Instruments BNC-9920
Summary of Contents for National Instruments BNC-9920
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Page 1: Table Of Contents
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: •... -
Page 2: Conventions
What You Need to Get Started To set up and use your BNC-9920 accessory, you need the following: ❑ NI CompactRIO Starter Kit ❑... - Page 3 Analog Input BNC Connectors (DIO 0–7) 23 Digital I/O BNC Connector (DIO 8) FS/GS Switches 17 Digital I/O LEDs 24 Power Indicator LED Analog Output BNC Connector Figure 1. BNC-9920 Front Panel © National Instruments Corporation BNC-9920 Operating Instructions and Specifications...
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Page 4: Connecting Analog Input Signals
Connect the BNC-9920 to the C Series modules using the BNC-9920 cable. Connect the 68-pin end of the cable to the BNC-9920 and the three labeled ends to the modules designated on the labels. -
Page 5: Measuring Floating Signals
Use a BNC cable to connect a differential analog input signal to one of the AI <0..7> BNC connectors on the front panel of the BNC-9920. If you are using AI 0, move the BNC/Temp. Ref. switch to the BNC position. -
Page 6: Measuring Temperature
AI GND and AI SENSE signals are located at the analog input screw terminals of the BNC-9920. Measuring Temperature You can measure temperature on the BNC-9920 with the temperature reference and thermocouple connector. To use the integrated circuit (IC) temperature reference on the BNC-9920, move the BNC/Temp. Ref. -
Page 7: Connecting Analog Output Signals
Connecting Analog Output Signals Use the AO 0 and AO 1 BNC connectors on the BNC-9920 front panel to connect analog output signals from channels AO 0 and AO 1 of the NI 9263 to external devices. Refer to the NI 9263 Operating Instructions and Specifications for information about using these signals. -
Page 8: Connecting Digital I/O Signals
The designated space next to each USER <1..2> BNC is for marking or labeling signal names. Connecting Digital I/O Signals Use the DIO <0..20> connectors of the BNC-9920 to connect to channels DIO <0..20> of the NI 9403. The DIO <0..7> connectors are screw terminals with indicator LEDs, DIO 8 is a BNC connector, and DIO <9..20>... -
Page 9: Specifications
The calculated quotient is equal to the number of revolutions and the remainder is equal to the remaining degrees. Specifications This section lists the specifications of the BNC-9920. These specifications are typical at 25 °C unless otherwise specified. Caution Using the BNC-9920 defeats electrical isolation between C Series modules. - Page 10 Comparison ............Triangle wave is approximately 2 times the sine wave output 4.4 V maximum Output impedance ..........600 Ω Drive capability Square Wave (V Sine/Triangle Wave (V 10 k Ohms Figure 7. Typical Maximum Voltages versus Load Impedances BNC-9920 Operating Instructions and Specifications ni.com...
- Page 11 For UL and other safety certifications, refer to the product label or visit ni.com/ , search by model number or product line, and click the appropriate certification link in the Certification column. © National Instruments Corporation BNC-9920 Operating Instructions and Specifications...
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Page 12: Environmental Management
At the end of the product life cycle, all products must be sent to a WEEE recycling center. For more information about WEEE recycling centers, National Instruments WEEE initiatives, and compliance with WEEE Directive 2002/96/EC on Waste and Electronic Equipment, visit ni.com/environment/weee... -
Page 13: Where To Go For Support
For patents covering National Instruments products/technology, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your media, or the National Instruments Patent Notice at ni.com/patents.
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