National Instruments BNC-2090A Bedienungsanleitung

QUICK START GUIDE

BNC-2090A

Rack-Mount Connector Accessory for E/M Series DAQ Devices

The National Instruments BNC-2090A is a desktop or rack-mount analog

breakout accessory you can connect to E/M Series multifunction DAQ

devices. This quick start guide describes how to install and configure your

BNC-2090A accessory with a DAQ device.

Refer to the BNC-2090A User Manual for in-depth information about

accessory installation, cable connections, jumper settings, signals, and

signal conditioning, as well as accessory specifications.

Figure 1 shows the BNC-2090A front panel and enclosure back.

Figure 1. BNC-2090A Front Panel and Back of Enclosure

1 BNC Connectors

2 68-Position Connectors

3 Spring Terminal Block

4+5VLED

5 SE/DIFF Switches

6 RSE/NRSE Switch

NATIONAL

INSTRUMENTS

BNC-2090A

DIFF

RSE

NRSE

1 4

BNC-2090A Quick Start Guide 2 ni.com

Installing the BNC-2090A

To connect the BNC-2090A to your DAQ device, refer to Figure 2 as you

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 Getting Started

Guide for instructions.

Figure 2. Connecting the BNC-2090A to Your DAQ Device

1. Place the BNC-2090A near the host computer or mount the

BNC-2090A into a 19 inch rack. If you do not rack-mount the

accessory, attach the four adhesive rubber feet included in the

BNC-2090A kit to the bottom of the accessory.

2. Connect the BNC-2090A to the DAQ device using the front or rear

68-position connector, shown in Figure 1. Refer to Table 1 to verify

that you have the appropriate cable for your DAQ device.

1 BNC-2090A

2 Shielded Cable

3 E/M Series DAQ Device

4 Personal Computer

NATIONAL

INSTRUMENTS

BNC-2090A

©National Instruments Corporation 3 BNC-2090A Quick Start Guide

If the +5V LED does not light, check the cable connections.

When you have finished using the BNC-2090A, power off any external

signals connected to the BNC-2090A before you power off your computer.

Caution Do not connect input voltages greater than 42.4 Vpk/60 VDC to the BNC-2090A.

The BNC-2090A is not designed for any input voltages greater than 42.4 Vpk/60 VDC,

even if a user-installed voltage divider reduces the voltage to within the input range of the

DAQ device. Input voltages greater than 42.4 Vpk/60 VDC can damage the BNC-2090A,

all devices connected to it, and the host computer. Overvoltage can also cause an electric

shock hazard for the operator. National Instruments is not liable for damage or injury

resulting from such misuse.

Table 1. BNC-2090A Cabling Options

DAQ Device Required Cable(s)

68-pin PCI, PCIe, PXI, or PXIe M Series*SHC68-68-EPM or RC68-68

68-pin PCI or PXI E Series SH68-68-EP or R6868

*Two-connector M Series devices can be cabled to two BNC-2090A accessories with two cables.

Note: Refer to the BNC-2090A User Manual for information about other E/M Series device connections.

BNC-2090A Quick Start Guide 4 ni.com

Connecting Differential Analog Input Signals

Complete the following steps to measure a differential (DIFF) analog input

signal.

1. Connect the BNC cable to one of the AI <0..7> BNC connectors on the

front panel.

Do not connect anything to the corresponding AI <8..15> BNC

connector below the AI <0..7> BNC connector you use.

2. Move the corresponding SE/DIFF switch to the DIFF position. On the

BNC-2090A front panel, a line indicates which SE/DIFF switch

corresponds to each AI <0..7> BNC connector.

3. Configure your software to measure this channel differentially.

Figure 3 shows how differential AI signals are routed to the DAQ device.

Figure 3. Analog Input Differential Mode

Cable

Do Not

Connect

BNC-2090A

AI 0

DIFF

AI 8

RSE/NRSE

Switch

Not Used

RSE

NRSE

AI 0

DAQ Device

AI 8

©National Instruments Corporation 5 BNC-2090A Quick Start Guide

Connecting Single-Ended Analog Input Signals

Complete the following steps to measure a single-ended (SE) analog input

signal.

1. Connect the BNC cable to one of the AI <0..15> BNC connectors on

the front panel.

2. Move the corresponding SE/DIFF switch to the SE position. On the

BNC-2090A front panel, a line indicates which SE/DIFF switch

corresponds to each AI <0..15> BNC connector.

3. Move the RSE/NRSE switch to select how the ground signal is routed.

All single-ended signals share the one RSE/NRSE switch. For more

information about non-referenced single-ended (NRSE) and

referenced single-ended (RSE) modes, refer to the E Series User

Manual or the M Series User Manual.

4. Configure your software to measure this channel in RSE or

NRSE mode.

Figure 4 shows how single-ended AI signals are routed to the DAQ device.

Figure 4. Analog Input Single-Ended Mode

AI 0

DAQ Device

BNC-2090A

AI 0

AI SENSE

RSE/NRSE

Switch

RSE

NRSE

AI 8

AI GND

AI 8

DIFF

Cable

BNC-2090A Quick Start Guide 6 ni.com

Connecting Analog Output, APFI, and PFI Signals

Use the BNC-2090A BNC connectors on the front panel to connect

AO <0..1>, APFI 0, and PFI 0 signals to your DAQ device. Refer to your

DAQ device documentation for information on the use of these signals.

Figure 5 shows how AO 0, AO 1, APFI 0, and PFI 0 signals are routed to

the DAQ device.

Figure 5. Analog Output, APFI 0, and PFI 0

Connecting Digital Signals

Use the BNC-2090A spring terminal block on the front panel to connect

digital signals to your DAQ device. Refer to your DAQ device

documentation for information on the use of these signals.

When connecting signals to the spring terminal blocks, you can use up to

20 AWG wire with the insulation stripped to 0.5 in.

AO 0

DAQ Device

BNC-2090A

AO 0

AO GND

AO 1

APFI 0

AI GND

PFI 0

D GND

Cable

©National Instruments Corporation 7 BNC-2090A Quick Start Guide

Using the USER 1 and USER 2 BNC Connectors

The USER 1 and USER 2 BNC connectors allow you to use a BNC

connector for a digital or timing I/O signal of your choice. The USER 1 and

USER 2 BNC connectors are routed (internal to the BNC-2090A) to the

USER1 and USER2 spring terminals, as shown in Figure 6.

Figure 6. USER <1..2> BNC Connections

Figure 7 shows an example of how to use the USER <1..2> BNCs.

To access the PFI 5 signal from a BNC, connect USER1 on the spring

terminal block to PFI 5 with a wire.

Figure 7. Connecting PFI 5 to USER 1 BNC

USER 1 BNC

USER 2 BNC Screw Terminal Block

D GND

USER2

DGND

+5V

DGND

USER1

DGND

P0 PFI

Internal Connection

USER 1 BNC

Screw Terminal Block

D GND

USER2

DGND

+5V

DGND

USER1

DGND

P0 PFI

Internal

Connection Wire

BNC Cable

PFI 5

Signal

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.

Where to Go from Here

Refer to the BNC-2090A User Manual for information about the following

subjects:

• Detailed installation instructions

• In-depth signal information

• Using the BNC-2090A with DAQCard and 100-pin E Series devices

and USB Mass Termination M Series devices

• Changing the shield ground jumper setting

• Installing signal conditioning components

• BNC-2090A specifications

You can find the BNC-2090A User Manual on ni.com/manuals.

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