National Instruments BNC-2144 User manual

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
BA
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
!
AB
346
5
1
2
2
3
1

©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.

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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,
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