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Page 2
USER GUIDE
NI CB-2162
Single-Ended Digital I/O Accessory
Ρ΅νιϋΠȂུࢊβȜΐ܄ȃ
The NI CB-2162 is a connector block and prototyping board for National Instruments digital
waveform generator/analyzer modules. The NI CB-2162 provides an easy way to complete the
following tasks:
•Terminate digital I/O (DIO) and control channels
•Connect to other devices for testing and debugging
•Develop and interface to prototype circuits
•Probe DIO and control channels
This guide explains how to set up and use the NI CB-2162 single-ended DIO accessory.
Caution To ensure the specified EMC performance of the device connected to the
NI CB-2162, this product must be installed in a shielded enclosure and used only
with shielded cables and accessories. Do not use unshielded cables or accessories
unless they are installed in a shielded enclosure with properly designed and shielded
input/output ports and connected to the product using a shielded cable. If unshielded
cables or accessories are not properly installed and shielded, the EMC specifications
for the product are no longer guaranteed. Refer to Mounting the NI CB-2162 in an
Enclosure for installation guidance.
Contents
What You Need to Get Started ................................................................................................. 2
Related Documentation ............................................................................................................ 2
Parts Locator Diagram.............................................................................................................. 3
To set up and use the NI CB-2162, you need the following items:
NI SHC68-C68-D2 or NI C68-C68-D4 cable assembly
Compatible NI digital waveform generator/analyzer module installed in a PXI chassis,
compact PCI chassis, or desktop PC
CA-1000 (NI part number 777664-01), rack-mount side panels (NI part number
777665-01), and an NI CB-2162 CA-1000 mounting kit for mounting the NI CB-2162 in
an enclosure
You also may need the following optional items:
Resistors and 10-pin single-inline packaged resistor networks for pull-up/pull-down and
series termination
The NI CB-2162 ships populated with a 0 Ω resistor. A 50 Ω resistor also is included for
optional STROBE/PFI 5 series termination.
30-gauge wire
Wire-wrap tool
1 × 2 header receptacle(s)
DC power supply for the prototyping area
The documentation included with the digital waveform generator/analyzer module and the
driver software included with your NI device
Related Documentation
National Instruments digital waveform generator/analyzer modules ship with several documents
designed to familiarize you with different aspects of the module. The titles and location of the
documents vary based on the instrument driver that supports the NI device, but you should have
the following types of documentation:
•Getting Started Guide—This printed document should be the first thing you read.
Its purpose is to guide you through setting up the digital waveform generator/analyzer
module and configuring it to generate or acquire your first samples.
•Help—This online document provides more in-depth information about the hardware
capabilities of the digital waveform generator/analyzer module, theory of operation
discussion, and information on programming flow and software reference.
•Specifications—This printed document provides specifications for the NI hardware.
ni.com/manuals for the most current documentation.
Vis it
You also may have documentation for any application development environment (ADE) you are
using.
Refer to Figure 1 to locate connectors and components on the NI CB-2162.
Figure 1. NI CB-2162 Parts Locator Diagram
1 68-Pin Digital Data & Control (DDC) Connector
2 Termination Sockets
3 Control and Ground Header Pairs
4 Prototyping Area Power Connectors
5 Prototyping Area Power LED
6 Prototyping Area Power and Ground Solder Pads
7 Prototyping Area
8 Labeling Strips
9 DIO and Ground Header Pairs
A cable connects the NI CB-2162 to the digital waveform generator/analyzer. Figure 2 shows
how to install a cable.
Figure 2. Connecting a 68-Pin Digital Waveform Generator/Analyzer to the CB-2162
2
NI PXI-1042
NI PXIe-6536
25 MHz Digital I/O
1
1 PXI Chassis with NI Digital Waveform
Generator/Analyzer
Refer to Figure 2 as you complete the following steps to install the supported cable:
Caution Before connecting the cable, disconnect power from the module,
accessory, and any other connected hardware to prevent damage to the hardware and
personal injury. NI is not liable for damage resulting from improper connections.
ACCESS ACTIVE
J15
DIGITAL DATA & CONTROL
F6 F5F4 F3 F2F1
4/DDC
5/
CLKOUT
STROBE
J3
J4
3
2Cable
3 NI CB-2162 Accessory
1.Install NI-HSDIO or NI-DAQmx and the digital waveform generator/analyzer by
following the installation procedure in the Getting Started Guide that shipped with your
device.
Caution Before attaching any cables or accessories, install the digital waveform
generator/analyzer. Refer to the Getting Started Guide that shipped with your device
for instructions on installing the module.
2.Attach either end of the cable assembly to the DDC connector of the digital waveform
generator/analyzer module and secure the cable with the captive screws on the cable
connector.
3.Attach the other end of the cable assembly to the DDC connector of the NI CB-2162 and
secure them together with the captive screws on the cable connector.
DIO 30
GND
DIO 28
GND
DIO 26
GND
DIO 24
GND
DIO 22
GND
DIO 20
GND
DIO18
GND
DIO 16
GND
DIO 14
RESERVED/PFI_0
DIO 12
GND
DIO 10
GND
DIO 8
GND
DIO 6
RESERVED
DIO 4
GND
DIO 2
PFI 2
DIO 0
GND
STROBE/PFI_5
GND
Each DIO, PFI, and clock channel of the digital waveform generator/analyzer connects to a
corresponding pin on the NI CB-2162.
Refer to Figure 1 for the location of these pins on the NI CB-2162.
Caution Before powering down the digital waveform generator/analyzer module,
remove power from the prototyping area of the NI CB-2162. NI is not liable for any
damage resulting from improper signal connections.
Figure 3 shows the DDC connector pinout of the NI CB-2162.
Note Refer to the help file for your device for information about the number of
available DIO channels on your device. DIO <20..31> or PFI_0 may not be
applicable to your device. The function of DDC CLK OUT/PFI_4 and
STROBE/PFI_5 may be unique to your device.
Table 1 describes the DDC signals shown in Figure 3.
Table 1. DDC Connector Pinout Descriptions
DDC PinSignal Description
DIO <0..31>Bidirectional digital data channels 0 through 31.
STROBE/PFI_5External sample clock source for pattern acquisition or
general-purpose PFI*.
DDC CLK OUT/PFI_4Exported sample clock signal or general-purpose PFI.
PFI <0..3>Programmable functional interface (PFI) channels 0 through 3.
GNDGround reference for signals.
RESERVEDThese channels are reserved for system use. Do not connect
signals to these channels.
*
Refer to your device documentation for support.
The NI CB-2162 provides connectivity to up to 32 of the single-ended DIO channels of an NI
digital waveform generator/analyzer. The 32 DIO channels are divided into two bundles of
16 × 2 header pins. Each bundle is grouped by signal and ground pairs. The ground pins provide
ground return paths for the DIO channels.
You can make connections to the DIO channels, the PFI channels, DDC CLK OUT/PFI_4, or
STROBE/PFI_5 on the NI CB-2162 using a 1 × 2 header receptacle, ribbon cable, a wire-wrap
technique, or by soldering directly to the pins. Examples of how to make these connections are
provided in the following sections.
Caution Connections that exceed any of the maximum ratings for the NI CB-2162
or the NI digital waveform generator/analyzer module can damage the module and
the computer. Maximum input ratings are provided in the Specifications section and
in the specifications document that shipped with the digital waveform
generator/analyzer. NI is not liable for any damage resulting from such signal
connections.
Each signal and ground header pair is labeled on the NI CB-2162 and in Figure 1. These header
pairs are arranged so that you can make quick connections using a 1 × 2 header receptacle to a
coaxial cable assembly.
Note Header receptacle assemblies are not included with the NI CB-2162, but you
can create custom assemblies by purchasing parts from vendors such as 3M.
Connectivity is made by inserting the receptacle onto the appropriate header pair. Refer to the
receptacle documentation to assure that proper connections are made to signal and ground.
Figure 4 shows how to make 1 × 2 header receptacle connections.
The header pairs on the NI CB-2162 are available for single wire probing. You also can use
32-pin ribbon cables to easily connect a large number of channels to other devices. Cable type
and quality can dramatically affect how well the signal integrity is maintained. NI recommends
using short twisted-pair ribbon cables.
Refer to the device or cable manufacturer for additional information on proper connectivity to
the NI CB-2162 signal and ground connections.
Figure 5 shows how to connect a ribbon cable to the accessory.
Figure 5. Using a Ribbon Cable with the NI CB-2162
Make connections from the appropriate 1 × 1 header with a standard wire-wrap tool and
30-gauge or similar wire. Strip the wire and insert it into the receptacle end of the wire-wrap tool.
Place the wire-wrap tool over the appropriate header pair pin, and twist the tool around the
header post. You then can make connections to the device under test (DUT) as defined by the
device manufacturer. Connect the DIO channel and ground header pins for each channel being
used.
Figure 6 provides an illustration for making a wire-wrap connection.
Figure 6. Wire-Wrap Connections
1
2
3
1 Wire-Wrap Tool
2 Stripped Wire
3 Header Pin Receptacle
Terminating Signals
Termination of high-speed digital signals is necessary to prevent signal reflections and to force
signal channels to a known state when no signal is present. Sockets for terminating resistors are
connected to all DIO and control channels on the NI CB-2162. These sockets are labeled in
Figure 1.
Note Proper termination needs are application-specific. For some special
considerations for choosing resistor values, refer to the Terminating Control Channel
Stubs are unterminated tributaries from the original signal path. Stubs decrease the signal quality
of the system by adding reflections to the transmission channels. To minimize the effect of stubs,
termination is placed at the end of the signal path.
If your signal transmission line ends on the NI CB-2162, you can use the provided termination
socket. If your signal terminates somewhere other than the NI CB-2162, NI recommends
terminating the transmission line at the final signal destination.
Note Refer to the help file for your device for more information about proper signal
termination.
Terminating DIO Channel Signals
Table 2 shows the relationship between DIO channels and the termination sockets.
Table 2. DIO Termination Sockets
DIO ChannelsTermination Socket
DIO <0..7>J13
DIO <8..15>J15
DIO <16..23>J17
DIO <24..31>J19
Note Refer to the help file for your device for information about the number of
available DIO channels on your device. DIO <20..31> may not be applicable to your
device.
You can use different resistor networks and jumper placements to terminate the DIO channels in
multiple configurations.
Figure 7 shows the J13 connector as an example of this termination scheme.
Figure 8 shows a typical parallel resistor network.
Figure 8. Example of Parallel Resistor Network
110
You can implement a pull-up or pull-down termination using a parallel configuration. Insert the
10-pin parallel resistor network into the appropriate termination socket with the common pin of
the resistor network (pin 1 in Figure 8) connected to pin 1 of the socket, as shown in Figure 7.
With jumpers W<4..7> in place, pin 1 of J13, J15, J17, and J19 are all pulled to ground. The
signal can be alternately pulled up or terminated to a nonground voltage if you remove the
jumpers and apply power to the jumper pin connected to pin 1 of the socket.
Alternatively, the common pin of the parallel resistor network shown in Figure 7 can be inserted
into pin 10 of the socket shown in Figure 8. External power can then be applied to the connection
point located below pin 10 of the socket to provide proper termination.
Thevenin (Dual) Termination
In some applications, you might need to provide a Thevenin (dual) termination or a pull-up and
pull-down configuration. Figure 9 shows a typical dual-termination resistor network, which can
accomplish this task.
Figure 9. Example of Dual-Termination Resistor Network
R2R2R2R2R2R2
R1R1R1R1R1R2R1R2R1
110
R1
To implement this configuration, insert the 10-pin resistor network into the J connector
corresponding to the desired DIO channel. Make connections to ground using a jumper to
connect W4, W5, W6, and/or W7 with the pull-down configuration mentioned previously. This
jumper effectively terminates the signal or pulls the signal to ground by a value provided by R2
of Figure 9.
You can use the pull-up terminating resistance by connecting pin 10 of the resistor network to
the solder pads connected to pin 10 of the socket, as shown in Figure 7. Connect external power
to this solder point. Refer to the resistor network manufacturer documentation for information
on proper pin labeling and resistor values.
Terminating Control Channel Signals
The control channel termination sockets are intended to accept standard through-hole resistors.
Refer to Figure 1 for the termination socket locations. Table 3 lists the termination sockets for
control channel termination resistors.
Table 3. Control Channel Termination
Control ChannelTermination SocketsTermination Type
Notes Depending on the revision of your NI CB-2162, termination sockets may be
alternately referred to as the name in parenthesis.
Refer to the help file for your device for information about the function of DDC CLK
OUT/PFI_4 and STROBE/PFI_5.
The series termination socket for the STROBE/PFI_5 channel is intended for use when the
originating source of the signal being applied to the STROBE/PFI_5 terminal of the DDC
connector is near the 1 × 2 STROBE/PFI_5 control channel pin and has a source impedance of
less than 50 Ω
. In this case, you might want to add series resistance to raise the total source
impedance to 50 Ω to minimize reflections. This socket is populated with a 0 Ω resistor before
the NI CB-2162 is shipped.
Note To ensure proper high-speed operation, make sure that the connections from
the DIO pins to your device under test are matched in length.
When inserting a resistor into any of the control channel termination sockets, first trim the leads
of the resistor to an appropriate length and ensure that the resistor fits securely into the socket.
The NI CB-2162 prototyping area is designed to aid you in the following tasks:
•Prototyping and testing circuits—Use the NI CB-2162 in conjunction with an NI digital
waveform generator/analyzer for prototyping, evaluating, and testing custom circuits
and/or components.
•Creating custom interfaces—Use the NI CB-2162 for creating custom interfaces to other
cables or devices. You can use the prototyping area to mount and interface the integrated
circuits (ICs) or connectors required for your application.
•Prototyping a DUT load board—Use the NI CB-2162 as a simple DUT interface board or
as a prototype of a custom DUT load board.
The prototyping area is labeled in Figure 1. Also labeled in this diagram are the erasable labeling
strips for your notes as you use the prototyping area.
Connecting Power
Caution NI is not liable for any device damage or personal injury resulting from
improper connections that exceed the maximum specifications of the NI CB-2162.
To provide power to the prototyping area, connect VCC from a DC power supply to J3 (red
terminal) and ground to J4 (black terminal). Refer to the Specifications section for the acceptable
voltage ranges.
The green power LED is lit when a positive voltage is applied to the NI CB-2162. However, if
negative voltage is applied, the Power LED does not light. The power connectors and LED for
the prototyping area are labeled in Figure 1.
Prototyping Circuits
The prototyping area of the NI CB-2162 consists of 304 through-hole solder pads—208 isolated
pads for component mounting and wire connections, 48 pads connected to VCC, and 48 pads
connected to ground—and space for attaching surface-mount components.
Refer to the Specifications section and to the NI digital waveform generator/analyzer modules
specifications for information on the voltage limitations on circuits created in the prototyping
area.
Replacing Components
The NI CB-2162 does not use replaceable fuses. If you need to replace the LED, choose a
replacement that meets the specifications described in the Specifications section.
Mount the NI CB-2162 in an enclosure under the following circumstances:
•The connected device requires shielded cables and accessories to ensure its EMC
performance specifications.
•You want to reduce radio interference.
•You want convenience when using the NI CB-2162 in a rack-mount system.
You can purchase a CA-1000 (777664-01) and an NI CB-2162 CA-1000 Mounting Kit
(192065-01) for mounting your NI CB-2162 in an enclosure. The mounting kit contains a
VHDCI panelette and three screws. The CA-1000 includes the standoffs that are required to
attach the NI CB-2162 to the bottom of the CA-1000.
If you want to rack-mount the NI CB-2162 after it is installed in the CA-1000, you can purchase
rack-mount side panels (777665-01).
To install the NI CB-2162 in the CA-1000, complete the following steps:
1.Remove the jackscrews and washers from the NI CB-2162 DDC connector, as shown in
Figure 10.
Figure 10. Remove Jackscrews from DDC Connector
1 Jackscrews2 Washers3 NI CB-2162
Note You will not need the washers to mount the NI CB-2162 in the CA-1000.
Save the washers in case you ever need to remove the NI CB-2162 from the CA-1000
and use the NI CB-2162 outside the enclosure.
11. Replace the top cover of the CA-1000 by replacing the screws you removed in step 2. Refer
to Figure 11 for an illustration.
12. Install I/O panelettes in the unused panelette openings, as shown in Figure 13. The
panelettes in the following figure are blank, but you can purchase many other types of I/O
panelettes from NI. For more information on the other I/O panelettes, go to
search for I/O Connector Panelettes.
Figure 13. Install Blank I/O Panelettes
1
ni.com and
2
1 I/O Panelettes2 Screws
The NI CB-2162 is now installed in the CA-1000 enclosure.
Specifications
Digital I/O
DIO channels .................................................... 32, single-ended
Control I/O channels......................................... 6, single-ended
Resistors
Number .............................................................2
LED
Type .................................................................. 5 mm diffused LED, green,
two banana-style connectors,
76 header pins,
4 termination sockets
(8 DIO per socket)
Weight ............................................................... 82 g (2.9 oz)
Caution When connected to other test objects, this product may cause radio
interference. In a residential environment, the user may be required to take adequate
measures to reduce the radio interference.
CC
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