National Instruments BNC-2111 Bedienungsanleitung

INSTALLATION GUIDE

BNC-2111

BNC Accessory for M Series and E Series Devices

This installation guide describes how to install and configure your

BNC-2111 accessory. If you have not already installed your DAQ device,

refer to the DAQ Quick Start Guide for instructions.

The BNC-2111 is an adapter you can connect to data acquisition (DAQ)

devices. The BNC-2111 includes 24 BNC connectors that allow

connections for 16 single-ended analog input signals, 2 analog output

signals, 5 digital I/O / programmable function input (PFI) signals, and the

external reference voltage for analog output. The BNC-2111 also includes

a single two-position switch for selecting between floating source and

ground-referenced analog input signals.

National Instruments offers two versions of the BNC-2111:

• With metal enclosure

• Without metal enclosure (board only)

Both versions of the BNC-2111 are suitable for desktop use. An optional

DIN rail-mounting kit for the BNC-2111 with metal enclosure is available

from NI.

The available signals on the BNC-2111 are listed in the Specifications

section. If your application requires differential connections or other digital

signals, consider other NI products such as the BNC-2090, BNC-2110,

BNC-2115, or BNC-2120.

The BNC-2111 has one 68-pin connector to connect to your DAQ device.

The BNC-2111 is ideal for simplifying connections between your

measurement apparatus and your DAQ device in laboratory, test, and

production environments.

BNC-2111 Installation Guide 2 ni.com

Figure 1. BNC-2111 Front Panel (Shown with Metal Enclosure)

1 Floating Source (RSE)/

Ground-Referenced Source (NRSE) Switch

2 BNC Connectors

3 BNC Center Pin

4 BNC Shield

AI GND AI SENSE

AI0 AI6 AI12

AI1 AI7 AI13

AI2 AI8 AI14

AI3 AI9 AI15

AI4 AI10 AO0

AI5 AI11 AO1 APFI 0/

(AO EXT REF)

BNC-2111

PFI 13/P1.0

(CTR 1 OUT)

PFI 12/P2.4

(CTR O OUT)

PFI 7/P1.7

(PFI 7/AI SAMP)

PFI 2/P1.2

(PFI 2/AI CONVERT)

NRSE

RSE

AIx

M SERIES (E SERIES)

PFI 0/P1.0

(PFI 0/AI START)

©National Instruments Corporation 3 BNC-2111 Installation Guide

What You Need to Get Started

To set up and use your BNC-2111 accessory, you need the following:

❑BNC-2111 BNC accessory

❑BNC-2111 Installation Guide

❑Cable for connecting your DAQ device to the BNC-2111. Refer to the

Choosing a Cable section for information on which cable to use for

your DAQ device.

❑M Series or E Series Multifunction DAQ Device

For detailed specifications for the BNC-2111, refer to the Specifications

section.

Caution Do not connect the BNC-2111 to any device other than the National Instruments

devices listed in the Choosing a Cable section. Doing so can damage the BNC-2111, the

DAQ device, or the host computer. National Instruments is not liable for damage resulting

from these connections.

Choosing a Cable

Refer to Tables 1 through 5 to choose the correct cable for your DAQ

device.

Table 1. 68-Position VHDCI I/O Connector

DAQ Device Connector Diagram

NI 6220/6221

NI 6250/6251

NI 6280/6281

NI DAQCard-6024E

NI DAQCard-6036E

NI DAQCard-6062E

DAQ Device

SHC68-68-EPM

Cable

BNC-2111

BNC-2111 Installation Guide 4 ni.com

Table 2. 68-Pin SCSI-II I/O Connector

DAQ Device Connector Diagram

NI 6013/6014

DAQPad-6020E

PCI-6023E/PCI-6024E

NI 6030E/6032E

NI 6034E/6035E/PCI-6036E

NI 6040E

NI 6052E/DAQPad-6052E

NI-6070E/DAQPad-6070E

PCI-MIO-16E-1

PCI-MIO-16E-4

PCI-MIO-16XE-10

PCI-MIO-16XE-50

Table 3. Double 68-Position VHDCI I/O Connector—32 AI Channels

DAQ Device Connector Diagram

NI 6224/6229

NI 6254/6259

NI 6284/6289

DAQ Device SH68-68-EP Cable BNC-2111

BNC-2111

SHC-68-68-EPM Cable BNC-2111

SHC-68-68-EPM Cable

DAQ Device

Connector 1

Connector 0

©National Instruments Corporation 5 BNC-2111 Installation Guide

Table 4. Double 68-Position VHDCI I/O Connector—80 AI Channels

M Series Device Connector Diagram

NI 6225

Table 5. 100-Pin Female 0.050 D-Type I/O Connector

DAQ Device Connector Diagram

NI 6025E

NI 6031E/6033E

NI 6071E

BNC-2111

SHC-68-68 Cable BNC-2115

or other

accessory

SHC-68-68-EPM Cable

DAQ Device

Connector 1

Connector 0

BNC-2115

or other

accessory

SH100-68-68 Cable

BNC-2111

Extended I/O Leg

DAQ Device

MIO-16 Leg

BNC-2111 Installation Guide 6 ni.com

Installing the BNC-2111

To connect the BNC-2111 to your DAQ device, complete the following

steps. Consult your computer user manual or technical reference manual

for specific instructions and warnings.

Note If you have not already installed your DAQ device, refer to the DAQ Quick Start

Guide for instructions.

1. Place the BNC-2111 near the host computer or use the optional DIN

rail-mounting kit, which you can order from National Instruments. The

DIN rail-mounting kit can only be used with the BNC-2111 with metal

enclosure. For more information about the DIN rail-mounting kit, refer

to the National Instruments Web site at ni.com or call the branch

office nearest you.

2. With your DAQ device powered off, connect the BNC-2111 to your

DAQ device with the selected cable.

3. Determine if your input signals are floating source or

ground-referenced:

•Floating Signal Sources—A floating signal source is not

connected to the building ground system, but has an isolated

ground-reference point. Some examples of floating signal sources

are outputs of transformers, thermocouples, battery-powered

devices, optical isolators, and isolation amplifiers. An instrument

or device that has an isolated output is a floating signal source.

•Ground-Referenced Signal Sources—A ground-referenced

signal source is connected to the building system ground, so it is

already connected to a common ground point with respect to the

device, assuming that the computer is plugged into the same

power system as the source. Nonisolated outputs of instruments

and devices that plug into the building power system fall into this

category.

4. Make sure the referenced single-ended (RSE)/nonreferenced

single-ended (NRSE) switch is set correctly for your application. Set

the switch to RSE to measure floating source signals, or to NRSE to

measure ground-referenced signals. The switch setting will be applied

to all 16 analog input BNC connectors. Refer to the Connecting

Signals to the BNC-2111 section for more information.

©National Instruments Corporation 7 BNC-2111 Installation Guide

5. Set your DAQ device to function correctly in software. The device

should be set to referenced single-ended mode (RSE) for measuring

floating source signals, or nonreferenced single-ended mode (NRSE)

for measuring ground-referenced signals.

•NI-DAQmx

– Set the appropriate terminal configuration when configuring

your global virtual channels in Measurement & Automation

Explorer (MAX).

– Or set these modes by using the Input Terminal Configuration

control of the DAQmx Create Virtual Channel VI or function

in your ADE.

• Traditional NI-DAQ (Legacy)

– Set the appropriate input mode when configuring your global

virtual channels or set the AI Mode property for your device

by right-clicking it under Devices and Interfaces and

selecting Properties in MAX.

– Or set these modes by using the Coupling & Input Config

control of the AI Config VI or by using the appropriate

function for your ADE.

6. Connect the field signals to the BNC connectors. Refer to the

Connecting Signals to the BNC-2111 section for more information.

7. Refer to the DAQ Quick Start Guide to launch MAX, confirm that your

device is recognized, and configure your device settings.

8. Test specific device functionality, such as the ability to send and

receive data. Refer to the DAQ Quick Start Guide for more detailed

information on running test panels in MAX.

When you have finished using the BNC-2111, power off any external

signals connected to the BNC-2111 before you power off the computer.

Caution The BNC-2111 is not designed for input voltages greater than 42 V. Input

voltages greater than 42 V can damage the BNC-2111, any device connected to it, and the

host computer. Overvoltage also can cause an electric shock hazard for the operator.

National Instruments is not liable for damage or injury resulting from misuse.

BNC-2111 Installation Guide 8 ni.com

Connecting Signals to the BNC-2111

This section describes how to configure the BNC-2111. Refer to the

Specifications section for a list of available signals on the BNC-2111.

Note With NI-DAQmx, National Instruments has revised its terminal names so they are

easier to understand and more consistent among NI hardware and software products. The

revised terminal names used in this document are usually similar to the names they replace.

For a complete list of Traditional NI-DAQ (Legacy) terminal names and their NI-DAQmx

equivalents, refer to the Terminal Name Equivalences tables in the M Series Help for

M Series devices or the E Series Help for E Series devices at ni.com/manuals.

Connecting Analog Input Signals

Measuring Floating Signal Sources

To measure floating signal sources, move the selector switch to the floating

source switch position labeled RSE. When the selector switch is set to the

RSE position, the outer shields of all 16 analog input BNC connectors are

connected to the DAQ device’s AI GND input, as shown in Figure 2 and

Figure 3.

Note Measuring floating signal sources, such as isolated battery-powered equipment,

with the NRSE setting results in incorrect measurements.

Measuring Ground-Referenced Signals

To measure ground-referenced signals, move the switch to the NRSE

position. Refer to your DAQ device documentation for more information

on measuring floating and ground-referenced signals. When the switch is

in the NRSE position, the outer shields of all 16 analog input BNC

connectors are connected to the DAQ device’s AI SENSE input as shown

in Figure 2 and Figure 3.

©National Instruments Corporation 9 BNC-2111 Installation Guide

Figure 2. BNC-2111 Signal Source Types

Figure 3. AI Channels 0–15 Connections

Signal

Source

DAQ Device

AI GND

–

AI GND

Signal

Source

DAQ Device

AI GND

–

AI SENSE

Floating Source Ground-Referenced Source

AI SENSE

AI GND

RSE/NRSE

Selector

Switch

AI 15

AI 14

AI 1

AI 0

BNC-2111 Installation Guide 10 ni.com

Connecting Analog Output and PFI Signals

Connect each AO signal to the appropriate BNC connector

(AO Channels 0–1).

Use the BNC connectors to connect or access PFI signals on your DAQ

device. Figure 4 shows these connections. Refer to Table 6 in the

Specifications section for more information.

Figure 4. AO and PFI Connections

AO 0

AO 1

APFI 0

PFI 0/P1.0

PFI 2/P1.2

PFI 7/P1.7

PFI 12/P2.4

PFI 13/P2.5

AO GND

D GND

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