National Instruments BNC-2090A User manual

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
23
NATIONAL
INSTRUMENTS
BNC-2090A
SE
DIFF
SE
DIFF
SE
DIFF
SE
DIFF
SE
DIFF
SE
DIFF
SE
DIFF
SE
DIFF
RSE
NRSE
1 4
5
2
6

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
1
4
2
3

©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
SE
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
SE
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
AO 1
APFI 0
APFI 0
AI GND
PFI 0
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
D GND
USER2
5 6 7 8 9
10 11 12 13 14 15
DGND
6 7
+5V
DGND
1 2 4 3
USER1
DGND
0 1 2 3 4 5
P0 PFI
Internal Connection
USER 1 BNC
Screw Terminal Block
D GND
USER2
5 6 7 8 9
10 11 12 13 14 15
DGND
6 7
+5V
DGND
1 2 4 3
USER1
DGND
0 1 2 3 4 5
P0 PFI
Internal
Connection Wire
BNC Cable
PFI 5
Signal

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Refer to the Terms of Use section on ni.com/legal for more information about National
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appropriate location: Help»Patents in your software, the patents.txt file on your CD, or
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© 2006 National Instruments Corporation. All rights reserved. 371877A-01 Dec06
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.