National Instruments NI cDAQ-9181, NI cDAQ-9188, NI cDAQ-9184, NI cDAQ-9191 User Manual

NI cDAQTM-9181/9184/9188/9191

User Manual

NI CompactDAQ Ethernet and Ethernet/Wireless Chassis

NI cDAQ-9181/9184/9188/9191 User Manual

February 2017
372780K-01

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Contents

Chapter 1
Getting Started with the cDAQ Chassis

Safety Guidelines.............................................................................................................. 1-3

Electromagnetic Compatibility Guidelines ...................................................................... 1-3

Special Guidelines for Marine Applications ............................................................ 1-4

Hardware Symbol Definitions .......................................................................................... 1-4

Unpacking......................................................................................................................... 1-5

Installing the cDAQ Chassis............................................................................................. 1-5

Wiring Power to the cDAQ Chassis ................................................................................. 1-13

Troubleshooting Chassis Connectivity............................................................................. 1-14

Reserving the Chassis in MAX ........................................................................................ 1-15

QoS Priority...................................................................................................................... 1-15

Mounting the cDAQ Chassis............................................................................................ 1-16

Using the cDAQ Chassis on a Desktop .................................................................... 1-17

NI 9901 Desktop Kit for cDAQ-9184/9188 Chassis........................................ 1-17

Mounting the cDAQ Chassis on a Panel .................................................................. 1-17

cDAQ-9181/9191 ............................................................................................. 1-18

cDAQ-9184/9188 ............................................................................................. 1-21

Mounting the cDAQ Chassis on a DIN Rail ............................................................ 1-23

cDAQ-9181/9191 ............................................................................................. 1-24

cDAQ-9184/9188 ............................................................................................. 1-25

cDAQ Chassis Features .................................................................................................... 1-26

Chassis Grounding Screw......................................................................................... 1-26

LEDs......................................................................................................................... 1-26

Ethernet Port ............................................................................................................. 1-28

Ethernet LEDs .................................................................................................. 1-28

Ethernet Cabling ............................................................................................... 1-29

Reset Button ............................................................................................................. 1-30

Power Connector ...................................................................................................... 1-30

PFI BNC Connectors ................................................................................................

Antenna..................................................................................................................... 1-30

Cables and Accessories .................................................................................................... 1-31

Removing Modules from the cDAQ Chassis ................................................................... 1-31

Using the cDAQ Chassis .................................................................................................. 1-32

C Series Module ....................................................................................................... 1-32

Parallel versus Serial DIO Modules ................................................................. 1-33

cDAQ Module Interface ........................................................................................... 1-33

STC3......................................................................................................................... 1-33

1-30

© National Instruments | v

Contents

Chapter 2
Analog Input

Analog Input Triggering Signals ...................................................................................... 2-1

Analog Input Timing Signals............................................................................................ 2-2

AI Sample Clock Signal ........................................................................................... 2-2

Routing the Sample Clock to an Output Terminal ........................................... 2-2

AI Sample Clock Timebase Signal ........................................................................... 2-2

AI Convert Clock Signal Behavior For Analog Input Modules ............................... 2-3

Scanned Modules.............................................................................................. 2-3

Simultaneous Sample-and-Hold Modules ........................................................ 2-3

Sigma-Delta Modules .......................................................................................2-3

Slow Sample Rate Modules.............................................................................. 2-4

AI Start Trigger Signal ............................................................................................. 2-5

Using a Digital Source ...................................................................................... 2-5

Using an Analog Source ................................................................................... 2-5

Routing AI Start Trigger to an Output Terminal .............................................. 2-5

AI Reference Trigger Signal..................................................................................... 2-5

Using a Digital Source ...................................................................................... 2-6

Using an Analog Source ................................................................................... 2-6

Routing the Reference Trigger Signal to an Output Terminal.......................... 2-6

AI Pause Trigger Signal............................................................................................ 2-7

Using a Digital Source ...................................................................................... 2-7

Using an Analog Source ................................................................................... 2-7

Getting Started with AI Applications in Software ............................................................ 2-7

Chapter 3
Analog Output

Analog Output Data Generation Methods ........................................................................3-1

Software-Timed Generations .................................................................................... 3-1

Hardware-Timed Generations................................................................................... 3-2

Buffered Analog Output ................................................................................... 3-2

Analog Output Triggering Signals.................................................................................... 3-3

Analog Output Timing Signals ......................................................................................... 3-3

AO Sample Clock Signal .......................................................................................... 3-3

Routing AO Sample Clock to an Output Terminal........................................... 3-4

AO Sample Clock Timebase Signal ......................................................................... 3-4

AO Start Trigger Signal ............................................................................................3-4

Using a Digital Source ...................................................................................... 3-4

Using an Analog Source ................................................................................... 3-4

Routing AO Start Trigger Signal to an Output Terminal ................................. 3-4

AO Pause Trigger Signal .......................................................................................... 3-5

Using a Digital Source ...................................................................................... 3-5

Using an Analog Source ................................................................................... 3-6

vi | ni.com

NI cDAQ-9181/9184/9188/9191 User Manual

Minimizing Glitches on the Output Signal....................................................................... 3-6

Getting Started with AO Applications in Software .......................................................... 3-6

Chapter 4
Digital Input/Output and PFI

Digital Input/Output ......................................................................................................... 4-1

Serial DIO versus Parallel DIO Modules ................................................................. 4-1

Static DIO ................................................................................................................. 4-2

Digital Input.............................................................................................................. 4-2

Digital Input Triggering Signals....................................................................... 4-2

Digital Input Timing Signals ............................................................................ 4-2

Digital Input Filters .......................................................................................... 4-6

Getting Started with DI Applications in Software............................................ 4-7

Change Detection Event ........................................................................................... 4-7

Routing Change Detection Event to an Output Terminal................................. 4-7

Change Detection Acquisition.......................................................................... 4-7

Digital Output ........................................................................................................... 4-8

Digital Output Data Generation Methods......................................................... 4-8

Digital Output Triggering Signals .................................................................... 4-10

Digital Output Timing Signals ......................................................................... 4-10

Getting Started with DO Applications in Software .......................................... 4-13

Digital Input/Output Configuration for NI 9401 ...................................................... 4-13

PFI .................................................................................................................................... 4-13

PFI Filters ................................................................................................................. 4-13

Chapter 5
Counters

Counter Timing Engine .................................................................................................... 5-2

Counter Input Applications .............................................................................................. 5-3

Counting Edges......................................................................................................... 5-3

Single Point (On-Demand) Edge Counting ...................................................... 5-3

Buffered (Sample Clock) Edge Counting......................................................... 5-4

Controlling the Direction of Counting.............................................................. 5-5

Pulse-Width Measurement ....................................................................................... 5-5

Single Pulse-Width Measurement .................................................................... 5-6

Implicit Buffered Pulse-Width Measurement................................................... 5-6

Sample Clocked Buffered Pulse-Width Measurement ..................................... 5-6

Pulse Measurement................................................................................................... 5-7

Single Pulse Measurement................................................................................ 5-8

Implicit Buffered Pulse Measurement .............................................................. 5-8

Sample Clocked Buffered Pulse Measurement ................................................ 5-8

Semi-Period Measurement ....................................................................................... 5-9

Single Semi-Period Measurement .................................................................... 5-9

Implicit Buffered Semi-Period Measurement................................................... 5-10

Pulse versus Semi-Period Measurements ......................................................... 5-10

© National Instruments | vii

Contents

Frequency Measurement........................................................................................... 5-11

Low Frequency with One Counter.................................................................... 5-11

High Frequency with Two Counters................................................................. 5-12

Large Range of Frequencies with Two Counters .............................................5-12

Sample Clocked Buffered Frequency Measurement ........................................ 5-13

Choosing a Method for Measuring Frequency ................................................. 5-14

Which Method Is Best?..................................................................................... 5-16

Period Measurement ................................................................................................. 5-18

Position Measurement...............................................................................................5-19

Measurements Using Quadrature Encoders...................................................... 5-19

Channel Z Behavior .................................................................................................. 5-20

Measurements Using Two Pulse Encoders....................................................... 5-21

Buffered (Sample Clock) Position Measurement ............................................. 5-21

Two-Signal Edge-Separation Measurement ............................................................. 5-21

Single Two-Signal Edge-Separation Measurement .......................................... 5-22

Implicit Buffered Two-Signal Edge-Separation Measurement ........................5-22

Sample Clocked Buffered Two-Signal Separation Measurement .................... 5-23

Counter Output Applications ............................................................................................ 5-24

Simple Pulse Generation........................................................................................... 5-24

Single Pulse Generation .................................................................................... 5-24

Single Pulse Generation with Start Trigger ...................................................... 5-25

Pulse Train Generation ............................................................................................. 5-25

Finite Pulse Train Generation ........................................................................... 5-25

Retriggerable Pulse or Pulse Train Generation................................................. 5-26

Continuous Pulse Train Generation .................................................................. 5-27

Buffered Pulse Train Generation ...................................................................... 5-28

Finite Implicit Buffered Pulse Train Generation .............................................. 5-28

Continuous Buffered Implicit Pulse Train Generation ..................................... 5-29

Finite Buffered Sample Clocked Pulse Train Generation ................................ 5-29

Continuous Buffered Sample Clocked Pulse Train Generation ....................... 5-30

Frequency Generation............................................................................................... 5-30

Using the Frequency Generator ........................................................................ 5-30

Frequency Division................................................................................................... 5-31

Pulse Generation for ETS ......................................................................................... 5-32

Counter Timing Signals .................................................................................................... 5-32

Counter n Source Signal ........................................................................................... 5-33

Routing a Signal to Counter n Source ..............................................................5-33

Routing Counter n Source to an Output Terminal ............................................5-34

Counter n Gate Signal............................................................................................... 5-34

Routing a Signal to Counter n Gate .................................................................. 5-34

Routing Counter n Gate to an Output Terminal ............................................... 5-34

Counter n Aux Signal ............................................................................................... 5-35

Routing a Signal to Counter n Aux...................................................................5-35

viii | ni.com

NI cDAQ-9181/9184/9188/9191 User Manual

Counter n A, Counter n B, and Counter n Z Signals ................................................ 5-35

Routing Signals to A, B, and Z Counter Inputs................................................ 5-35

Routing Counter n Z Signal to an Output Terminal ......................................... 5-35

Counter n Up_Down Signal ..................................................................................... 5-35

Counter n HW Arm Signal ....................................................................................... 5-35

Routing Signals to Counter n HW Arm Input .................................................. 5-36

Counter n Sample Clock Signal................................................................................ 5-36

Using an Internal Source .................................................................................. 5-36

Using an External Source ................................................................................. 5-37

Routing Counter n Sample Clock to an Output Terminal ................................ 5-37

Counter n Internal Output and Counter n TC Signals .............................................. 5-37

Routing Counter n Internal Output to an Output Terminal .............................. 5-37

Frequency Output Signal .......................................................................................... 5-37

Routing Frequency Output to a Terminal ......................................................... 5-37

Default Counter/Timer Routing........................................................................................ 5-37

Counter Triggering ........................................................................................................... 5-38

Other Counter Features..................................................................................................... 5-38

Cascading Counters .................................................................................................. 5-38

Prescaling.................................................................................................................. 5-39

Synchronization Modes ............................................................................................ 5-39

80 MHz Source Mode....................................................................................... 5-39

External or Internal Source Less than 20 MHz ................................................ 5-40

Chapter 6
Digital Routing and Clock Generation

Digital Routing .................................................................................................................6-1

Clock Routing...................................................................................................................6-1

80 MHz Timebase .................................................................................................... 6-2

20 MHz Timebase .................................................................................................... 6-2

100 kHz Timebase .................................................................................................... 6-2

Appendix A
cDAQ-9191 Regulatory Information

Appendix B
Where to Go from Here

Appendix C
NI Services

Index

© National Instruments | ix

1

Getting Started with the
cDAQ Chassis

This chapter provides a cDAQ chassis overview and lists information about mounting the
chassis and installing C Series modules.

The one-slot NI CompactDAQ cDAQ-9181, four-slot CompactDAQ cDAQ-9184, and
eight-slot CompactDAQ cDAQ-9188 Ethernet chassis and the one-slot CompactDAQ
cDAQ-9191 Ethernet/wireless chassis are designed for use with C Series modules. The cDAQ
chassis are capable of measuring a broad range of analog and digital I/O signals and sensors. For
module specifications, refer to the documentation included with your C Series module(s) or go

ni.com/manuals.

to

Figure 1-1 shows the cDAQ-9181/9191 chassis.

Figure 1-1. cDAQ-9181/9191 Chassis

1

8

7

6

5

1 (cDAQ-9191) Antenna and Antenna Connector
2 Power Connector
3 Ethernet Port, 10/100 and LINK/ACT LEDs
4 Reset Button

2

3

4

5 POWER, STATUS, and ACTIVE LEDs
6 (cDAQ-9191) Wireless Signal Strength LEDs
7 Chassis Grounding Screw
8 Module Slot

© National Instruments | 1-1

Chapter 1 Getting Started with the cDAQ Chassis

123 45

7

6

NI cDAQ-9188

1

NI CompactDAQ

2

8

3

4

5

Figure 1-2 shows the cDAQ-9184 chassis.

Figure 1-2. cDAQ-9184 Chassis

7

NI cDAQ-9184

NI CompactDAQ

6

5

1 Chassis Grounding Screw
2 Installed C Series Module
3 Module Slots
4 Ethernet Port, LINK/ACT and 10/100/1000 LEDs

4

Figure 1-3 shows the cDAQ-9188 chassis.

Figure 1-3. cDAQ-9188 Chassis

1

3

5 Power Connector
6 Reset Button

2

7 POWER, STATUS, and ACTIVE LEDs

1 Chassis Grounding Screw
2 Installed C Series Module
3 Module Slots
4 Power Connector

5 Reset Button
6 PFI 0 and PFI 1 BNC Connectors
7 Ethernet Port, LINK/ACT and 10/100/1000 LEDs
8 POWER, STATUS, and ACTIVE LEDs

1-2 | ni.com

NI cDAQ-9181/9184/9188/9191 User Manual

Safety Guidelines

Caution Do not operate the NI cDAQ-9181/9184/9188/9191 chassis in a manner

not specified in these operating instructions. Product misuse can result in a hazard.
You can compromise the safety protection built into the product if the product is
damaged in any way. If the product is damaged, return it to National Instruments for
repair.

Note Because some C Series modules may have more stringent certification

standards than the NI cDAQ-9181/9184/9188/9191 chassis, the combined system
may be limited by individual component restrictions. Refer to the specifications
document for your cDAQ chassis for more details.

Hot Surface This icon denotes that the component may be hot. Touching this

component may result in bodily injury.

Electromagnetic Compatibility Guidelines

This product was tested and complies with the regulatory requirements and limits for
electromagnetic compatibility (EMC) stated in the product specifications. These requirements
and limits provide reasonable protection against harmful interference when the product is
operated in the intended operational electromagnetic environment.

This product is intended for use in industrial locations. However, harmful interference may
occur in some installations or when the product is connected to a peripheral device or a test
object. To minimize interference with radio and television reception and prevent unacceptable
performance degradation, install and use this product in strict accordance with the instructions
in the product documentation.

Furthermore, any modifications to the product not expressly approved by National Instruments
could void your authority to operate it under your local regulatory rules.

Caution To ensure the specified EMC performance, operate this product only with

shielded cables and accessories.

Caution To ensure the specified EMC performance, the length of any I/O cable

connected to a BNC PFI port must be no longer than 30 m (100 ft).

Caution To ensure the specified EMC performance, do not connect the power input

to a DC mains supply or to any supply requiring a connecting cable longer than 3 m
(10 ft). A DC mains supply is a local DC electricity supply network in the
infrastructure of a site or building.

© National Instruments | 1-3

Chapter 1 Getting Started with the cDAQ Chassis

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Ё೑ᅶ᠋

National Instruments

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(RoHS)

DŽ݇Ѣ

National InstrumentsЁ೑RoHS

ড়㾘ᗻֵᙃˈ䇋ⱏᔩ

ni.com/

environment/rohs_china

DŽ

(For information about China RoHS compliance,

go to

ni.com/environment/rohs_china

.)

Special Guidelines for Marine Applications

Some products are Lloyd’s Register (LR) Type Approved for marine (shipboard) applications.
To verify Lloyd’s Register certification for a product, visit

ni.com/certification and

search for the LR certificate, or look for the Lloyd’s Register mark on the product label.

Caution In order to meet the EMC requirements for marine applications, install the

product in a shielded enclosure with shielded and/or filtered power and input/output
ports. In addition, take precautions when designing, selecting, and installing
measurement probes and cables to ensure that the desired EMC performance is
attained.

Hardware Symbol Definitions

The following symbols are marked on your cDAQ chassis.

Caution When this symbol is marked on a product, refer to the Safety Guidelines

section for information about precautions to take.

ESD When this symbol is marked on a product, the product could be damaged if

subjected to Electrostatic Discharge (ESD) on the connector pins of any I/O port.
To prevent damage, industry-standard ESD prevention measures must be employed
during installation, maintenance, and operation.

EU Customers At the end of the product life cycle, all products must be sent to

a WEEE recycling center. For more information about WEEE recycling centers,
National Instruments WEEE initiatives, and compliance with WEEE Directive
2002/96/EC on Waste and Electronic Equipment, visit

.

weee

ni.com/environment/

1-4 | ni.com

NI cDAQ-9181/9184/9188/9191 User Manual

Unpacking

The cDAQ chassis ships in an antistatic package to prevent electrostatic discharge (ESD). ESD
can damage several components on the device.

Caution Never touch the exposed pins of connectors.

To avoid ESD damage in handling the chassis, take the following precautions:

• Ground yourself with a grounding strap or by touching a grounded object.

• Touch the antistatic package to a metal part of your computer chassis before removing the
chassis from the package.

Remove the chassis from the package and inspect it for loose components or any other signs of
damage. Notify NI if the device appears damaged in any way. Do not install a damaged chassis.

Store the chassis in the antistatic package when the chassis is not in use.

Installing the cDAQ Chassis

The cDAQ chassis and C Series module(s) are packaged separately. For an interactive
demonstration of how to install the cDAQ chassis, go to

cdaqinstall.

You will need the following items to set up the cDAQ chassis:

• Power adapter or power connector (packaged with the cDAQ chassis)

• Shielded straight through Category 5 Ethernet cable

• Antenna (packaged with the cDAQ-9191 chassis)

• Screwdriver (packaged with the cDAQ chassis)

• Host computer running Windows

• Application software (such as LabVIEW), if not already installed

• NI-DAQmx driver (packaged with the cDAQ chassis)

• Power supply (if using the power connector instead of the power adapter)

• Number 1 and number 2 Phillips screwdrivers

• C Series module(s)

ni.com/info and enter

1

1

You can either use a shielded straight through Category 5 Ethernet cable or an Ethernet crossover cable to
connect the cDAQ chassis directly to your computer.

© National Instruments | 1-5

Chapter 1 Getting Started with the cDAQ Chassis

Refer to Figure 1-1, 1-2, or 1-3 while completing the following assembly steps.

1. Install the application software (if applicable), as described in the installation instructions
that accompany your software.

2. Install NI-DAQmx. Insert the software media. If the NI-DAQmx installer does not open
automatically, select Start»Run. Enter x:\autorun.exe, where x is the drive letter.
Complete the instructions.

3. Register your NI hardware online at

ni.com/register when prompted.

4. The last dialog box opens with the following options.

• Restart Later to install more NI software or documentation.

• Shut Down or Restart if you are ready to install your device.

• Restart if you are using a system running the LabVIEW Real-Time Module.

Download NI-DAQmx to the target using MAX. Refer to the MAX Remote Systems
Help by selecting Help»Help Topics»Remote Systems in MAX.

5. If you have problems installing your software, go to

Note Table 1-1 lists the earliest NI-DAQmx support version for each cDAQ

ni.com/support/daqmx.

Ethernet and wireless chassis.

Table 1-1. cDAQ Chassis NI-DAQmx Software Support

cDAQ Chassis Earliest NI-DAQmx Version Support

cDAQ-9181 NI-DAQmx 9.3

cDAQ-9184 NI-DAQmx 9.6

cDAQ-9188 NI-DAQmx 9.2

cDAQ-9191 NI-DAQmx 9.4

The NI-DAQmx software is included on the disk shipped with your kit and is available for
download at

ni.com/support. The documentation for NI-DAQmx is available after

installation from Start»All Programs»National Instruments»NI-DAQmx. Other
NI documentation is available from ni.com/manuals.

6. (Optional) Mount the cDAQ chassis to a panel, wall, or DIN rail, or attach the desktop
mounting kit, as described in the Mounting the cDAQ Chassis section.

7. Attach a ring lug to a 1.31 mm

2

(16 AWG) or larger wire. Connect the ring lug to the chassis
ground terminal using the chassis grounding screw as shown in Figure 1-4. Attach the other
end of the wire to the grounding electrode system of your facility. Refer to the Chassis

Grounding Screw section for more information about making this connection.

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Note If you use shielded cabling to connect to a C Series module with a plastic

connector, you must attach the cable shield to the chassis grounding terminal using

2

1.31 mm

(16 AWG) or larger wire. Use shorter wire for better EMC performance.

Figure 1-4. Ring Lug Attached to Chassis Ground Terminal

8. Make sure that no signals are connected to the C Series module.

9. Align the C Series module with the cDAQ chassis slot.

10. Squeeze both C Series module latches, insert the module into the module slot, and press
until both latches lock the module in place.

11. Wire the C Series module as indicated in the C Series module documentation.

Note Connect I/O cable shields to the chassis grounding screw, shown in

Figure 1-4, unless otherwise specified in the C Series module documentation. Refer
to the Chassis Grounding Screw section for more information about making this
connection.

12. Connect one end of the Ethernet cable to the Ethernet port on the chassis, and the other end
directly to your computer or any network connection on the same subnet as your computer.
Refer to the Ethernet Cabling section for information about the Ethernet cable.

13. (cDAQ-9191) If you want to connect the cDAQ-9191 to a wireless network, attach the
supplied antenna.

14. Power the chassis using the included power adapter or other 9 V DC to 30 V DC power
source. The cDAQ chassis requires an external power supply that meets the specifications
listed in the specifications document for your cDAQ chassis. For information about wiring
your external power source, refer to the Wiring Power to the cDAQ Chassis section

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Chapter 1 Getting Started with the cDAQ Chassis

Caution When operating the cDAQ-9181/9184/9188/9191 in hazardous locations,

you must use the power connector with a power supply rated for hazardous locations.
The power supply included in the cDAQ-9181/9184/9188/9191 kit is not hazardous
locations-certified. Visit

ni.com to find hazardous locations-certified power

supplies.

The POWER and STATUS LEDs light. The POWER LED lights as long as power is being
supplied to the cDAQ chassis. The STATUS LED turns off after firmware boots. Refer to
the LEDs section for information about the LEDs on the cDAQ chassis.

15. (cDAQ-9191) If you want to connect the cDAQ-9191 to a wireless network, complete the
following steps:

a. Double-click the NI MAX icon, on the desktop to open Measurement & Automation

Explorer (MAX). Expand Devices and Interfaces»Network Devices.

b. Select the chassis and click the Network Settings tab. If your chassis is not listed,

refer to the Finding a Network DAQ Device in MAX topic in the Measurement &
Automation Explorer Help for NI-DAQmx.

c. Select your country.

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d. Select a wireless network in one of the following ways:

• To connect to an existing wireless network, select Connect to wireless network
as the Wireless Mode.

Figure 1-5. Connecting to a Wireless Network

Before connecting to an enterprise network, you may first need to upload a
certificate by clicking Certificate Management. Contact your IT department if
you are unsure of your network settings or configuration details.

Note For EAP-TLS authentication, you must also upload a private key file with

client certificate.

Click Wireless Network to search for and select a network from the scanned list,
or select Other Network and enter settings. Click Save to apply network
selection changes.

• To establish an ad-hoc network, select Create a Wireless Network.

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Chapter 1 Getting Started with the cDAQ Chassis

1

2

Note To set a QoS Priority for the cDAQ chassis, click More Settings and select a

priority from the list. The default QoS priority is Normal, which should be sufficient
for most applications.

1

e. Click the Save button. The Wireless Adapter wlan0 section displays the network

search status:

Scanning, Associating, and Connected to <network>.

f. Click the Settings tab and verify that the chassis has a wireless IP address (along with

the Ethernet IP address); if the System State reads

Connected - Running, the

cDAQ chassis is connected to the wireless network.

Figure 1-6. Chassis Connected - Running on Ethernet and Wireless Networks

1 Ethernet IP Address 2 Wireless IP Address

Note Establishing a network connection may take several seconds.

Note For more information about MAX configuration for the cDAQ-9191, refer to

the Configuring the Wireless Settings for an NI cDAQ-919x topic in the Measurement
& Automation Explorer Help for NI-DAQmx.

1

NI recommends setting QoS Priority to Normal if you are connecting to an existing wireless network.
Setting the QoS Priority to High or Critical might affect the performance of other devices on your wireless
network. Refer to the QoS Priority section for more information.

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16. To add the chassis, double-click the NI MAX icon on the desktop to open MAX. Expand
Devices and Interfaces»Network Devices.

• If the wired or wireless connection is on your local subnet, the chassis automatically

appears in the list of available devices. Right-click the cDAQ chassis and select Add
Device.

• If neither connection is on your local subnet, right-click Network Devices and select

Find Network NI-DAQmx Devices.

• If you know the chassis IP address, such as 192.168.0.2, enter it into the Add Device

Manually field, and click the + button.

Otherwise, enter the hostname of the chassis. The default hostname is
cDAQ91xx-<serial number>, where the xx represents the last two digits of
your cDAQ chassis model number.

The cDAQ chassis icon changes from grey to blue, indicating that it is recognized and
present on the network.

Figure 1-7. MAX Icons and States

1

1 Discovered, But Not Added to the Network 2 Recognized, Present, and Reserved on the Network

2

If your chassis does not appear in Available Devices, click Refresh List. If the chassis still
does not appear, try the following:

• If you connected the cDAQ chassis directly to your computer, ensure your network

card is configured to obtain an IP address automatically, then click Refresh List.

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Chapter 1 Getting Started with the cDAQ Chassis

1

2

Note If you connected the cDAQ chassis directly to your computer, the setup time

may be longer. Wait 30 to 60 seconds after the STATUS LED turns off, then click
Refresh List.

• Contact your system administrator to confirm that the network is working and that a
firewall is not interfering with discovery. For additional troubleshooting resources for
the cDAQ chassis, refer to the Troubleshooting Chassis Connectivity section of this
manual and the Finding a Network DAQ Device in MAX topic in the Measurement &
Automation Explorer Help for NI-DAQmx.

(cDAQ-9191) Disconnect the Ethernet cable from cDAQ-9191 chassis if you connected

17.
the chassis to a wireless network in step 15.

Note Your computer must be connected to a network that can access the chassis at

its wireless IP.

18.

(cDAQ-9191) Verify that the cDAQ-9191 chassis is connected to the wireless network by

clicking the Refresh button in MAX and verifying that the Ethernet IP address is
and the wireless IP address remains the same as in step 15.

Figure 1-8. Chassis Connected - Running on Wireless Network

0.0.0.0

1 Ethernet IP Address 2 Wireless IP Address

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19. If the cDAQ chassis is not reserved automatically, select the chassis and click the Reserve
Chassis button. Refer to the Reserving the Chassis in MAX section for more information.

20. Self-test your chassis in MAX by expanding Devices and Interfaces, right-clicking
NI cDAQ-<model number>, and selecting Self-Test. Self-test performs a brief test to

determine successful chassis installation. When the self-test finishes, a message indicates
successful verification or if an error occurred. If an error occurs, refer to

support/daqmx

21. Run a Test Panel in MAX by expanding Devices and Interfaces» NI cDAQ-<model
number>, right-clicking your C Series module, and selecting Test Panels to open a test

panel for the selected module.

If the test panel displays an error message, refer to ni.com/support.

Click Close to exit the test panel.

Note When in use, the cDAQ chassis may become warm to the touch. This is

normal.

.

ni.com/

Wiring Power to the cDAQ Chassis

Caution To ensure the specified EMC performance, do not connect the power input

to a DC mains supply or to any supply requiring a connecting cable longer than 3 m
(10 ft). A DC mains supply is a local DC electricity supply network in the
infrastructure of a site or building.

The cDAQ chassis requires an external power source as described in the Power Requirements
section of the specifications document for your cDAQ chassis. Some suggested NI power
supplies are listed in Table 1-8. The cDAQ chassis filters and regulates the supplied power and
provides power to all of the modules. The green POWER LED on the front panel identifies when
the power input is in use.

Complete the following steps to connect a power source to the cDAQ chassis.

1. Make sure the power source is turned off.

2. If connected, loosen the connector screw flanges and remove the power screw terminal
connector plug from the cDAQ chassis. Figure 1-9 shows the terminal screws, which secure
the wires in the screw terminals, and the connector screw flanges, which secure the
connector plug on the front panel.

© National Instruments | 1-13

Chapter 1 Getting Started with the cDAQ Chassis

1

2

3

Figure 1-9. Power Screw Terminal Connector Plug

1 V (Positive) Terminal Screw
2 C (Negative) Terminal Screw

Caution Do not tighten or loosen the terminal screws on the power connector while

3 Connector Screw Flanges

the power is on.

3. Connect the positive lead of the power source to the V terminal of the power connector plug
and tighten the terminal screw.

4. Connect the negative lead of the power source to the C terminal of the power screw
terminal connector plug and tighten the terminal screw.

5. Install the power connector plug on the front panel of the cDAQ chassis and tighten the
connector screw flanges.

6. Turn on the external power source(s).

If the power source is connected to the power connector using long wiring with high DC
resistance, the voltage at the power connector may be significantly lower than the specified
voltage of the power source.

The C terminal is not connected to chassis ground. You can connect the C terminal to chassis
ground externally. Refer to the Power Requirements section of the specifications document for
your cDAQ chassis for information about the power supply input range. Refer to the Safety
Voltages section of the specifications document for your cDAQ chassis for information about
the maximum voltage from terminal to chassis ground.

Troubleshooting Chassis Connectivity

If your cDAQ chassis becomes disconnected from the network, try the following:

• After moving the chassis to a new network, NI-DAQmx may lose connection to the chassis.
In this case, click Reconnect to provide NI-DAQmx with the new hostname or IP address.

• The cDAQ chassis icon indicates whether it is recognized and present on the network. If a
connected chassis appears as disconnected in the configuration tree in MAX, select
Self-Test or Reset Chassis. If successful, the chassis icon changes to blue.

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Figure 1-10. MAX Icons and States

1

1 Recognized, but Disconnected from the Network, Unreserved, or Reserved by Another Host
2 Recognized, Present, and Reserved on the Network

For additional troubleshooting resources for the cDAQ chassis, refer to the Finding a Network
DAQ Device in MAX topic in the Measurement & Automation Explorer Help for NI-DAQmx.

2

Reserving the Chassis in MAX

When the cDAQ chassis is connected to a network, multiple users can access the chassis. To
perform any DAQ functionality on the C Series modules, including reset chassis and self-test,
you must reserve the cDAQ chassis in MAX. Figure 1-10 depicts the chassis state icons in
MAX: an unreserved chassis or chassis reserved by another host appear with an X and reserved
chassis appear as blue. Only one user at a time can reserve the cDAQ chassis.

If the cDAQ chassis was not reserved automatically after it was added (Add Device), you can
reserve the cDAQ chassis in MAX by expanding Devices and Interfaces»Network Devices,
selecting the chassis, and clicking the Reserve Chassis button. The Override Reservation
dialog box appears when you attempt to explicitly reserve a chassis. Agreeing to override the
reservation forces the cDAQ chassis to be reserved by the current user.

QoS Priority

(cDAQ-9191) The QoS Priority sets the priority for the data transferred over the wireless

network adapter when the wireless device is sharing the channel with one or more devices. There
are four priorities: Disabled, Normal, High, and Critical, as described in Table 1-2. The default
is Normal.

Table 1-2. QoS Priority

MAX Option QoS 802.11e Standard

Disabled Disabled —

Normal (default) Enabled Best effort

High Enabled Video

Critical Enabled Vo i c e

© National Instruments | 1-15

Chapter 1 Getting Started with the cDAQ Chassis

You can set or update the QoS Priority at any time when connected to a wireless network. In
MAX, expand Devices and Interfaces»Network Devices, select the chassis, click the Network
Settings tab, click More Settings, and select a priority.

NI recommends setting the QoS Priority to Normal if you are connecting to an existing wireless
network. Setting the QoS Priority to High or Critical might affect the performance of other
devices on your wireless network.

When using the wireless QoS feature, verify that WMM/QoS is enabled in your access point/
router settings.

Note Ad Hoc networks do not support wireless QoS.

Mounting the cDAQ Chassis

You can use the cDAQ chassis on a desktop or mount it to a panel, wall, or DIN rail. For
accessory ordering information, refer to the pricing section of your cDAQ chassis product page

ni.com.

at

Caution Your installation must meet the following requirements:

• Allows 25.4 mm (1 in.) of clearance above and below the cDAQ chassis for air
circulation.

• Allows at least 50.8 mm (2 in.) of clearance in front of the modules for common
connector cabling such as the 10-terminal detachable screw terminal connector
and, as needed, up to 88.9 mm (3.5 in.) of clearance in front of the modules for
other types of cabling.

For more information about cabling clearances for C Series modules, refer to

ni.com/info and enter the Info Code cseriesconn.

Caution To maintain product performance and accuracy specifications when the

ambient temperature is between 45 °C and 55 °C, you must mount the chassis to a
metal panel or surface using the screw holes or the panel mount kit. DIN mounting
limits the device to 45 °C maximum ambient operating temperature. Measure the
ambient temperature at each side of the CompactDAQ system 63.5 mm (2.5 in.) from
the side and 25.4 mm (1 in.) from the rear cover of the system. For further
information about mounting configurations, go to

cdaqmounting.

Code

(cDAQ-9181/9191) The NI 9925 outdoor IP 54 enclosure for cDAQ-9181/9191 chassis offers

ni.com/info and enter the Info

protection from industrial and outdoor environments and supplies IP 54 rated power, wireless
antenna, Ethernet, and I/O connections.

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Using the cDAQ Chassis on a Desktop

You can use the cDAQ chassis on a desktop. cDAQ-9184/9188 users can also install an optional
desktop mounting kit.

Caution Do not stack cDAQ chassis.

Caution (cDAQ-9191) This transmitter must not be co-located or operated in

conjunction with any other antenna or transmitter.

NI 9901 Desktop Kit for cDAQ-9184/9188 Chassis

The NI 9901 desktop mounting kit includes two metal feet you can install on the sides of the
cDAQ chassis for desktop use. With this kit, you can tilt the cDAQ chassis for convenient access
to the module connectors. When you install the two metal feet, the two existing screws on the
back side and I/O end of the chassis must be removed, as shown in Figure 1-11. After removing
the screws, replace them with the screws included in the NI 9901 desktop mounting kit. The
cDAQ-9184 uses two M3 × 20 screws. The cDAQ-9188 uses two M3 × 14 screws.

Figure 1-11. NI 9901 Desktop Mounting Kit

You must mount the chassis before installing the C Series modules.

Mounting the cDAQ Chassis on a Panel

Caution To maintain product performance and accuracy specifications when the

ambient temperature is between 45 °C and 55 °C, you must mount the chassis to a
metal panel or surface using the screw holes or the panel mount kit. Measure the
ambient temperature at each side of the CompactDAQ system 63.5 mm (2.5 in.) from
the side and 25.4 mm (1 in.) from the rear cover of the system. For further
information about mounting configurations, go to

cdaqmounting.

Code

ni.com/info and enter the Info

© National Instruments | 1-17

Chapter 1 Getting Started with the cDAQ Chassis

You can use a panel mount kit to mount the cDAQ chassis on a panel, or mount directly to the
panel with your own screws. For kit accessory ordering information, refer to the pricing section
of your cDAQ chassis product page at

ni.com.

cDAQ-9181/9191

You can panel mount the cDAQ chassis with or without a panel mount kit.

Note The threaded holes on cDAQ chassis for panel or DIN rail mounting cannot

be used more than five times. Unscrewing and reinstalling the screws into the chassis
will produce a compromised connection between the panel and cDAQ chassis.

Caution Remove the C Series module(s) from the cDAQ chassis before you mount

the chassis to the panel. After the cDAQ chassis is mounted, you can reinsert the
C Series module(s).

• Panel Mounting with a Panel Mount Kit—Use the NI 9903 panel mount kit to mount the
cDAQ chassis on a panel. Align the panel mount accessory on the cDAQ chassis and attach
the accessory to the chassis with the two FLH #6-32 × 5/16 in. screws (included in the kit),
as shown in Figure 1-12. You must use these screws because they are the correct depth and
thread for the panel.

You can then attach the cDAQ chassis to a wall or panel with the two holes or the four keyholes
with M4, M5, No. 8, or No. 10 panhead screws. National Instruments does not provide these
screws with the chassis. Refer to Figure 1-13 for panel mount accessory dimensions.

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101.6 mm
(4.00 in.)

59.7 mm

(2.35 in.)

38.1 mm
(1.5 in.)

14.0 mm
(0.55 in.)

118.1 mm
(4.65 in.)

POWER

STATUS

ACTIVE

Figure 1-12. Installing the cDAQ-9181/9191 Panel Mount Kit

Figure 1-13. NI 9903 Panel Mount Accessory Dimensions

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Chapter 1 Getting Started with the cDAQ Chassis

• Panel Mounting without a Panel Mount Kit—Threaded holes are located in the cDAQ
chassis for mounting it to a panel. Use two standard #6-32 UNC-2B machine screws with
a maximum threaded engagement length of 4.83 mm (0.190 in.) to go through the panel and
into the back of the chassis, as shown in Figure 1-14. National Instruments does not provide
these screws with the chassis. Refer to the specifications document for your cDAQ chassis
for mounting dimensions.

Figure 1-14. Panel Mounting the cDAQ-9181/9191 without a Panel Mount Kit

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cDAQ-9184/9188

You can panel mount the cDAQ chassis with or without a panel mount kit:

• Panel Mounting with a Panel Mount Kit—Use the NI 9904 panel mount kit to mount the
cDAQ-9184 chassis on a panel. Use the NI 9905 panel mount kit to mount the cDAQ-9188
chassis on a panel.

Caution Remove the C Series module(s) from the cDAQ chassis before you mount

the chassis to the panel. After the cDAQ chassis is mounted, you can reinsert the
C Series module(s).

Align the cDAQ chassis on the panel mount accessory and attach the chassis to the
accessory with two screws (included in the kit), as shown in Figure 1-15. The cDAQ-9184
uses two M4 × 22 screws. The cDAQ-9188 uses two M4 × 17 screws. You must use these
screws because they are the correct depth and thread for the panel.

You can then attach the panel mount accessory to a wall or panel with the two holes or the
four keyholes with M4, M5, No. 8, or No. 10 panhead screws. National Instruments does
not provide these screws with the chassis. Refer to the documentation included with the
panel mount kit for more detailed dimensions.

© National Instruments | 1-21