National Instruments BNC-2144 Manual de usuario

INSTALLATION GUIDE

BNC-2144

The BNC-2144 is a 32-channel rack-mount adapter for interfacing to the NI PXI-449Xfamily.

The BNC-2144 has the following features:

• 32 analog input channels (BNC)

• 19 in. rack-mount housing

What You Need to Get Started

To set up and use the BNC-2144, you need the following items:

❑Hardware

–BNC-2144

– NI PXI-449XDynamic Signal Acquisition (DSA) device

❑Documentation

–BNC-2144 Installation Guide

–Read Me First: Safety and Radio-Frequency Interference

–NI PXI-449X Specifications

–NI Dynamic Signal Acquisition User Manual

–DAQ Getting Started Guide

❑Tools

– 1/8 in. flathead screwdriver

❑Cables

– Infiniband-to-Infiniband cables (part numbers 197516A-01, 197516A-02)

– BNC-to-BNC cables (part numbers 779697-01, 779697-02)

If you do not have NI-DAQmx 8.6 or later, or one of the documents, you can download them from

ni.com, or contact an NI sales representative.

Theory of Operation

Caution Refer to the Read Me First: Safety and Radio-Frequency Interference document before

removing equipment covers or connecting/disconnecting any signal wires. Refer to the Specifications

section of this document for important safety and compliance information.

BNC-2144 Installation Guide 2 ni.com

Figure 1 shows the BNC-2144 front and back panels.

Figure 1. BNC-2144 Parts Location Diagram

Connecting Signals

Figure 2 shows an example of a measurement system with the BNC-2144.

Figure 2. Connecting the BNC-2144

1 Device A BNC Connectors

2 Device B BNC Connectors

3 Device B AI8–AI15 Infiniband Connector

4 Device B AI0–AI7 Infiniband Connector

5 Device A AI0–AI7 Infiniband Connector

6 Device A AI8–AI15 Infiniband Connector

1 Sensors 2 NI PXI-449XDevices 3 BNC-2144

AI 0 - AI 7

AI 8 - AI 15

AI 0 - AI 7

AI 8 - AI 15

AI 0

BNC-2144

RACK-MOUNTABLE

ADAPTER

AI 1 AI 2 AI 3 AI 4 AI 5 AI 6 AI 7

AI 8 AI 9 AI 10 AI 11 AI 12 AI 13 AI 14 AI 15

AI 0 AI 1 AI 2 AI 3 AI 4 AI 5 AI 6 AI 7

AI 8 AI 9 AI 10 AI 11 AI 12 AI 13 AI 14 AI 15

346

©National Instruments Corporation 3 BNC-2144 Installation Guide

Specifications

This section lists the specifications for the BNC-2144. These specifications are typical at 25 °C unless

otherwise stated.

Analog Input

Input channels ........................................................32

Maximum input voltage

Positive terminal ............................................±10 Vpk

Negative terminal...........................................±1 Vpk

Overvoltage protection

Positive terminal ............................................±30 Vpk

Negative terminal...........................................±5 Vpk

Maximum cable length ..........................................61 m (200 ft), typical

Crosstalk

Physical

Dimensions ............................................................48.3 ×4.4 ×6.4 cm (19.0 ×1.7 ×2.5 in.)

Weight ....................................................................0.89 kg (1.96 pounds)

I/O Connectors

I/O connections ......................................................32 BNC connectors and 4 Infiniband 4x connectors

Environmental

Operating temperature ...........................................0 to 55 °C (Tested in accordance with IEC-60068-2-1

and IEC-60068-2-2.)

Storage temperature ...............................................–20 to 70 °C (Tested in accordance with

IEC-60068-2-1 and IEC-60068-2-2.)

Relative humidity...................................................10 to 90%, noncondensing (Tested in accordance

with IEC-60068-2-56.)

Altitude ..................................................................2,000 m (at 25 °C ambient temperature)

Pollution Degree (indoor use only)........................2

Gain (dB)

Crosstalk for Adjacent/ Nonadjacent Channels (dBc)*, †

1kHz 92.2 kHz

30 –110/–110 –85/–96

0, 10, 20 –115/–120 –85/–100

*Source impedance ≤1kΩ

†Input amplitude is –1 dBFS.

National Instruments, NI, ni.com, and LabVIEW are trademarks of National Instruments Corporation.

Refer to the Terms of Use section on ni.com/legal for more information about National

Instruments trademarks. Other product and company names mentioned herein are trademarks or trade

names of their respective companies. For patents covering National Instruments products, refer to the

appropriate location: Help»Patents in your software, the patents.txt file on your CD, or

ni.com/patents.

Safety

This product is designed to meet the requirements of the following standards of safety for electrical

equipment for measurement, control, and laboratory use:

• IEC 61010-1, EN-61010-1

• UL 61010-1, CSA 61010-1

Note For UL and other safety certifications, refer to the product label or visit ni.com/

certification, search by model number or product line, and click the appropriate link in the

Certification column.

Environmental Management

National Instruments is committed to designing and manufacturing products in an environmentally

responsible manner. NI recognizes that eliminating certain hazardous substances from our products is

beneficial not only to the environment but also to NI customers.

For additional environmental information, refer to the NI and the Environment Web page at ni.com/

environment. This page contains the environmental regulations and directives with which NI

complies, as well as any other environmental information not included in this document.

Waste Electrical and Electronic Equipment (WEEE)

EU Customers At the end of their life cycle, all products must be sent to a WEEE recycling center.

For more information about WEEE recycling centers and National Instruments WEEE initiatives,

visit ni.com/environment/weee.htm.

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