National Instruments CompactRIO cRIO-9074XT User manual

USER MANUAL AND SPECIFICATIONS
NI cRIO-9074XT
Reconfigurable Embedded Chassis with Integrated Intelligent Real-
Time Controller for CompactRIO
Figure 1. CompactRIO cRIO-9074XT
NI cRIO-907x
1
3
5
2
4
6
7
8
POWER
FPGA
STATUS
USER1
DO NOT SEPARATE CABLES WHEN
ENERGIZED IN HAZARDOUS LOCATIONS
SAFE MODE
CONSOLE OUT
IP RESET
NO APP
USER1
NO FPGA
LINK
LINK
10/
100
10/
100
RESET
INPUT
19-30 V
20 W MAX
TRIGGER
V
C
NC
C
1. LEDs
2. RS-232 Serial Port
3. RJ-45 Ethernet Port 2
4. RJ-45 Ethernet Port 1
5. SMB Connector
6. Power Connector
7. Reset Button
8. DIP Switches
This document describes how to connect the cRIO-9074XT to a network and how to use the
features of the cRIO-9074XT.

Safety Guidelines
Operate the cRIO-9074XT only as described in this document.
Caution Do not operate the cRIO-9074XT in a manner not specified in this
document. 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 NI for repair.
Safety Guidelines for Hazardous Locations
The cRIO-9074XT is suitable for use in Class I, Division 2, Groups A, B, C, D, T4 hazardous
locations; Class I, Zone 2, AEx nA IIC T4 and Ex nA IIC T4 hazardous locations; and
nonhazardous locations only. Follow these guidelines if you are installing the cRIO-9074XT in
a potentially explosive environment. Not following these guidelines may result in serious
injury or death.
Caution Do not disconnect the power supply wires and connectors from the
controller unless power has been switched off.
Caution Do not disconnect I/O-side wires or connectors unless power has been
switched off or the area is known to be nonhazardous.
Caution Do not remove modules unless power has been switched off or the area is
known to be nonhazardous.
Caution Substitution of components may impair suitability for Class I, Division 2.
Caution For Division 2 and Zone 2 applications, install the system in an enclosure
rated to at least IP54 as defined by IEC/EN 60079-15.
Special Conditions for Hazardous Locations Use in Europe and
Internationally
The cRIO-9074XT has been evaluated as Ex nA IIC T4 Gc equipment under DEMKO
Certificate No. 12 ATEX 1202658X and is IECEx UL 14.0089X certified. Each device is
marked II 3G and is suitable for use in Zone 2 hazardous locations, in ambient temperatures
of -40 °C ≤ Ta ≤ 70 °C.
Caution You must make sure that transient disturbances do not exceed 140% of
the rated voltage.
Caution The system shall only be used in an area of not more than Pollution
Degree 2, as defined in IEC 60664-1.
Caution The system shall be mounted in an ATEX/IECEx-certified enclosure with
a minimum ingress protection rating of at least IP54 as defined in IEC/EN 60079-15.
2| ni.com | NI cRIO-9074XT User Manual and Specifications

Caution The enclosure must have a door or cover accessible only by the use of a
tool.
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, when the product is connected to a peripheral device or test object,
or if the product is used in residential or commercial areas. 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 changes or modifications to the product not expressly approved by National
Instruments could void your authority to operate it under your local regulatory rules.
Special Conditions 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.
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.
What You Need to Install CompactRIO
Reconfigurable Embedded Hardware
• CompactRIO reconfigurable embedded chassis with integrated intelligent real-time
controller
• C Series I/O modules
• DIN rail mount kit (for DIN rail mounting only)
• Two M4 or number 10 panhead screws (for panel mounting only)
• A number 2 Phillips screwdriver
• Power supply
Note Visit ni.com/info and enter the Info Code rdsoftwareversion to
determine which software you need to use the cRIO-9074XT.
NI cRIO-9074XT User Manual and Specifications | © National Instruments | 3

Mounting the CompactRIO Reconfigurable
Embedded Chassis
You can mount the chassis in any orientation on a 35 mm DIN rail or on a panel. Use the DIN
rail mounting method if you already have a DIN rail configuration or if you need to be able to
quickly remove the CompactRIO chassis. Use the panel mount method for high shock and
vibration applications.
Caution Your installation must meet the following requirements for space and
cabling clearance:
• Allow 25.4 mm (1 in.) on the top and the bottom of the chassis for air
circulation.
• Allow 50.8 mm (2 in.) in front of modules for cabling clearance for common
connectors, such as the 10-terminal, detachable screw terminal connector.
Figure 2. cRIO-9074XT Bottom View with Dimensions
29.0 mm
(1.14 in.)
58.9 mm
(2.32 in.)
3.3 mm
(0.13 in.)
Cabling Clearance
50.8 mm (2.00 in.)
48.4 mm
(1.91 in.)
286.4 mm
(11.28 in.)
4| ni.com | NI cRIO-9074XT User Manual and Specifications

Figure 3. cRIO-9074XT Front View with Dimensions
165.1 mm
(6.50 in.)
3.1 mm
(0.12 in.)
51.1 mm
(2.04 in.)
36.4 mm
(1.43 in.)
19.0 mm
(0.75 in.)
NI cRIO-907x
88.1 mm
(3.47 in.)
1
1. Chassis grounding terminal
Figure 4. cRIO-9074XT Side View with Dimensions
3X M4X0.7
25 mm
(0.98 in.)
44 mm
(1.73 in.)
23.7 mm
(0.94 in.)
63.1 mm
(2.48 in.)
44.1 mm
(1.74 in.)
The following sections contain instructions for the mounting methods. Before using any of
these mounting methods, record the serial number from the back of the chassis. You will be
unable to read the serial number after you have mounted the chassis.
Caution Make sure that no I/O modules are in the chassis before mounting it.
NI cRIO-9074XT User Manual and Specifications | © National Instruments | 5

Mounting the Chassis on a Panel
Panel or wall mounting is the best method for applications that are subject to high shock and
vibration. You can use the NI 9905 panel mount kit to mount the cRIO-9074XT on a flat
surface. Complete the following steps.
1. Fasten the chassis to the panel mount kit using a number 2 Phillips screwdriver and two
M4 × 16 screws. NI provides these screws with the panel mount kit. You must use these
screws because they are the correct depth and thread for the panel. Tighten the screws to a
maximum torque of 1.3 N · m (11.5 lb · in.).
Figure 5. Installing the Panel Mount Accessory on the cRIO-9074XT
NI cRIO-9074
Figure 6. Dimensions of cRIO-9074XT with Panel Mount Accessory Installed
31.8 mm
(1.25 in.)
NI cRIO-9074
15.5 mm
(0.61 in.)
9.5 mm
(0.38 in.) 28.1 mm
(1.11 in.)
63.5 mm
(2.50 in.)
88.1 mm
(3.47 in.)
311.2 mm
(12.25 in.)
330.2 mm
(13.00 in.)
2. Fasten the NI 9905 panel to the wall using the screwdriver and screws that are
appropriate for the wall surface. The maximum screw size is M4 or number 8.
6| ni.com | NI cRIO-9074XT User Manual and Specifications

Caution Make sure that no I/O modules are in the chassis before removing it from
the panel.
Mounting the Chassis on a DIN Rail
You can order the NI 9915 DIN rail mount kit if you want to mount the chassis on a DIN rail.
You need one clip for mounting the chassis on a standard 35 mm DIN rail. Complete the
following steps to mount the chassis on a DIN rail.
1. Fasten the DIN rail clip to the chassis using a number 2 Phillips screwdriver and two
M4 × 16 screws. NI provides these screws with the DIN rail mount kit. Tighten the
screws to a maximum torque of 1.3 N · m (11.5 lb · in.).
Figure 7. Installing the DIN Rail Clip on the cRIO-9074XT
2. Insert one edge of the DIN rail into the deeper opening of the DIN rail clip.
NI cRIO-9074XT User Manual and Specifications | © National Instruments | 7

Figure 8. One Edge of the DIN Rail Inserted in a Clip
3
2
1
1. DIN Rail Clip
2. DIN Rail
3. DIN Rail Spring
3. Press down firmly on the chassis to compress the spring until the clip locks in place on
the DIN rail.
Caution Make sure that no I/O modules are in the chassis before removing it
from the DIN rail.
Installing C Series I/O Modules in the Chassis
The following figure shows the mechanical dimensions of C Series I/O modules.
Figure 9. C Series I/O Module, Front and Side View with Dimensions
88.1 mm
(3.47 in.)
70.7 mm
(2.78 in.)
22.9 mm
(0.90 in.)
Complete the following steps to install a C Series I/O module in the chassis.
1. Make sure that no I/O-side power is connected to the I/O module. If the system is in a
nonhazardous location, the chassis power can be on when you install I/O modules.
2. Align the I/O module with an I/O module slot in the chassis. The module slots are labeled
1 to 8, left to right.
8| ni.com | NI cRIO-9074XT User Manual and Specifications

Figure 10. Installing an I/O Module in the Chassis
NI cRIO-9074
1
2
1. Insertion Groove
2. Latch
3. Squeeze the latches and insert the I/O module into the module slot.
4. Press firmly on the connector side of the I/O module until the latches lock the I/O module
into place.
5. Repeat these steps to install additional I/O modules.
Removing I/O Modules from the Chassis
Complete the following steps to remove a C Series I/O module from the chassis.
1. Make sure that no I/O-side power is connected to the I/O module. If the system is in a
nonhazardous location, the chassis power can be on when you remove I/O modules.
2. Squeeze the latches on both sides of the module and pull the module out of the chassis.
Connecting the Chassis to a Network
Connect the chassis to an Ethernet network using the RJ-45 Ethernet port on the controller
front panel. Use a standard Category 5 (CAT-5) or better shielded, twisted-pair Ethernet cable
to connect the chassis to an Ethernet hub, or use an Ethernet crossover cable to connect the
chassis directly to a computer.
NI cRIO-9074XT User Manual and Specifications | © National Instruments | 9

Caution To prevent data loss and to maintain the integrity of your Ethernet
installation, do not use a cable longer than 100 m.
The first time you power up the chassis, it attempts to initiate a DHCP network connection. If
the chassis is unable to initiate a DHCP connection, it connects to the network with a link-
local IP address with the form 169.254.x.x. After powerup, you must install software on
the chassis and configure the network settings in NI Measurement & Automation Explorer
(MAX).
Note Installing software may change the network behavior of the chassis. For
information about network behavior by installed software version, go to ni.com/info
and enter the Info Code ipconfigcrio.
Connecting the Chassis to Earth Ground
You must connect the chassis grounding screw to earth ground. Complete the following steps
to connect to earth ground.
1. Attach a ring lug to a 2.0 mm2 (14 AWG) or larger wire.
2. Remove the grounding screw from the grounding terminal on the right side of the chassis.
3. Attach the ring lug to the grounding terminal.
4. Tighten the grounding screw to 0.5 N · m (4.4 lb · in.) of torque.
5. Attach the other end of the wire to the grounding electrode system of your facility using a
method appropriate for the application.
Caution If you use shielded cabling to connect to a C Series I/O module with
a plastic connector, you must attach the cable shield to the chassis grounding
terminal using 1.3 mm2 (16 AWG) or larger wire. Attach a ring lug to the wire
and attach the wire to the chassis grounding terminal. Solder the other end of
the wire to the cable shield. Use shorter wire for better EMC performance.
For more information about ground connections, go to ni.com/info and enter the Info
Code emcground.
Wiring Power to the Chassis
The cRIO-9074XT requires an external power supply that meets the specifications in the
Power Requirements section. The cRIO-9074XT filters and regulates the supplied power and
provides power for all of the I/O modules. The cRIO-9074XT has one layer of reverse-voltage
protection. Complete the following steps to connect a power supply to the chassis.
1. Connect the positive lead of the power supply to the V terminal of the power connector
shipped with the cRIO-9074XT, and tighten the terminal screw. The following figure
shows the terminal screws, which secure the wires in the screw terminals, and the
connector screws, which secure the power connector on the front panel.
10 | ni.com | NI cRIO-9074XT User Manual and Specifications

Figure 11. Power Connector
C
NC
C
V
2
1
2
1. Terminal Screws
2. Connector Screws
2. Connect the negative lead of the power supply to one of the C terminals of the power
connector and tighten the terminal screw.
3. Optionally, you can connect the positive lead of another power supply to the other V
terminal and the negative lead to one of the C terminals.
4. Install the power connector on the front panel of the cRIO-9074XT and tighten the
connector screws.
Powering On the cRIO-9074XT
When you apply power to the cRIO-9074XT, the controller runs a power-on self test (POST).
During the POST, the Power and Status LEDs turn on. The Status LED turns off, indicating
that the POST is complete. If the LEDs do not behave in this way when the system powers on,
refer to the Understanding LED Indications section.
You can configure the cRIO-9074XT to launch an embedded stand-alone LabVIEW RT
application each time you boot the controller. Refer to the LabVIEW Help for more
information.
Chassis Reset Options
The following table lists the reset options available on CompactRIO systems such as the
cRIO-9074XT. These options determine how the chassis behaves when the controller is reset
in various conditions. Use the RIO Device Setup utility to select reset options. Access the RIO
Device Setup utility by selecting Start»All Programs»National Instruments»NI-RIO»RIO
Device Setup.
NI cRIO-9074XT User Manual and Specifications | © National Instruments | 11

Table 1. CompactRIO Reset Options
Chassis Reset Option Behavior
Do not autoload VI Does not load the FPGA bit stream from flash memory.
Autoload VI on device
powerup
Loads the FPGA bit stream from flash memory to the FPGA
when the controller powers on.
Autoload VI on device reboot Loads the FPGA bit stream from flash memory to the FPGA
when you reboot the controller either with or without
cycling power.
Connecting Serial Devices to the cRIO-9074XT
The cRIO-9074XT has an RS-232 serial port to which you can connect devices such as
displays or input devices. Use the Serial VIs to read from and write to the serial port from a
LabVIEW RT application. For more information about the Serial VIs, refer to the LabVIEW
Help.
Figure 12. Controller Serial Port
Pin 1
Pin 5
Pin 6
Pin 9
Table 2. DB-9 Pin Descriptions
Pin Signal
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
12 | ni.com | NI cRIO-9074XT User Manual and Specifications

Using the Internal Real-Time Clock
The system clock of the cRIO-9074XT is synchronized with the internal high-precision real-
time clock at startup. This synchronization provides timestamp data to the controller. You can
also use the internal real-time clock to correct drift of the system clock. Refer to the Internal
Real-Time Clock Specifications for the accuracy specifications of the real-time clock.
Using the SMB Connector for Digital I/O
(cRIO-9074 only)
You can use the SMB connector of the cRIO-9074XT to connect digital devices to the
controller. For example, if you connect the pulse-per-second output of a GPS device to the
SMB connector of the cRIO-9074XT, you can use the GPS device to correct for drift of the
system clock.
For software that supports GPS drift-correction and other digital I/O through the SMB
connector, go to ni.com/info and enter the Info Code criosmb.
Configuring DIP Switches
Figure 13. DIP Switches
1 65432
SAFE MODE
CONSOLE OUT
IP RESET
NO APP
USER1
NO FPGA
OFF
All of the DIP switches are in the OFF position when the chassis is shipped from National
Instruments.
SAFE MODE Switch
The position of the SAFE MODE switch determines whether the embedded LabVIEW Real-
Time engine launches at startup. If the switch is in the OFF position, the LabVIEW Real-Time
engine launches. Keep this switch in the OFF position during normal operation. If the switch is
in the ON position at startup, the cRIO-9074XT launches only the essential services required
for updating its configuration and installing software. The LabVIEW Real-Time engine does
not launch.
If the software on the controller is corrupted, you must put the controller into safe mode and
reformat the controller drive. You can put the controller into safe mode by powering it up
either with the SAFE MODE switch in the ON position or with no software installed on the
NI cRIO-9074XT User Manual and Specifications | © National Instruments | 13

drive. Refer to the Measurement & Automation Explorer Help for more information about
installing software on a controller and reformatting the drive on the controller.
CONSOLE OUT Switch
With a serial-port terminal program, you can use the CONSOLE OUT switch to read the IP
address and firmware version of the controller. Use a null-modem cable to connect the serial
port on the chassis to a computer. Push the switch to the ON position. Make sure that the
serial-port terminal program is configured to the following settings:
• 9,600 bits per second
• Eight data bits
• No parity
• One stop bit
• No flow control
The serial-port terminal program displays the IP address and firmware version of the chassis.
Keep this switch in the OFF position during normal operation.
IP RESET Switch
Push the IP RESET switch to the ON position and reboot the controller to reset the IP address
and other TCP/IP settings of the controller to the factory defaults. Refer to the Troubleshooting
Network Communication section for more information about resetting the IP address. You also
can push this switch to the ON position to unlock a chassis that was previously locked in
MAX.
NO APP Switch
Push the NO APP switch to the ON position to prevent a LabVIEW RT startup application
from running at startup. If you want to permanently disable a LabVIEW RT application from
running at startup, you must disable it in LabVIEW. To run an application at startup, push the
NO APP switch to the OFF position, create an application using the LabVIEW Application
Builder, and configure the application in LabVIEW to launch at startup. If you already have an
application configured to launch at startup and you push the NO APP switch from ON to OFF,
the startup application is automatically enabled. For more information about automatically
launching VIs at startup and disabling VIs from launching at startup, refer to the LabVIEW
Help.
USER1 Switch
You can define the USER1 switch for your application. To define the purpose of this switch in
your embedded application, use the RT Read Switch VI in your LabVIEW RT embedded VI.
For more information about the RT Read Switch VI, refer to the LabVIEW Help.
NO FPGA Switch
Push the NO FPGA switch to the ON position to prevent a LabVIEW FPGA application from
loading at startup. The NO FPGA switch overrides the CompactRIO reset options described in
the Chassis Reset Options section. After startup you can download to the FPGA from software
regardless of switch position.
14 | ni.com | NI cRIO-9074XT User Manual and Specifications

Using the RESET Button
Pressing the RESET button resets the processor in the same manner as cycling power.
Note The FPGA continues to run unless you select the Autoload on Any Device
Reset boot option. Refer to the Chassis Reset Options section for more information.
Understanding LED Indications
Figure 14. cRIO-9074XT LEDs
POWER
FPGA
STATUS
USER1
POWER LED
The POWER LED is lit while the cRIO-9074XT is powered on. This LED indicates that the
power supply connected to the chassis is adequate.
FPGA LED
You can use the FPGA LED to help debug your application or easily retrieve application
status. Use the LabVIEW FPGA Module and NI-RIO software to define the FPGA LED to
meet the needs of your application. Refer to LabVIEW Help for information about
programming this LED.
STATUS LED
The STATUS LED is off during normal operation. The cRIO-9074XT indicates specific error
conditions by flashing the STATUS LED a certain number of times every few seconds, as
shown in the following table
Number of
Flashes Every
Few Seconds Indication
1
The chassis is unconfigured. Use MAX to configure the chassis. Refer
to the Measurement & Automation Explorer Help for information about
configuring the chassis.
2
The chassis has detected an error in its software. This usually occurs
when an attempt to upgrade the software is interrupted. Reinstall
software on the chassis. Refer to the Measurement & Automation
Explorer Help for information about installing software on the chassis.
NI cRIO-9074XT User Manual and Specifications | © National Instruments | 15

Number of
Flashes Every
Few Seconds Indication
3
The chassis is in safe mode because the SAFE MODE DIP switch is in
the ON position or there is no software installed on the chassis. Refer to
the Configuring DIP Switches section for information about the SAFE
MODE DIP switch.
4
The software has crashed twice without rebooting or cycling power
between crashes. This usually occurs when the chassis runs out of
memory. Review your RT VI and check the memory usage. Modify the
VI as necessary to solve the memory usage issue.
Continuously
blinking
The chassis has detected an unrecoverable error. Contact National
Instruments.
Continuously
blinking or solid
The device may be configured for DHCP but unable to get an IP address
because of a problem with the DHCP server. Check the network
connection and try again. If the problem persists, contact National
Instruments.
USER1 LED
You can define the USER1 LED to meet the needs of your application. To define the LED, use
the RT LEDs VI in LabVIEW. For more information about the RT LEDs VI, refer to the
LabVIEW Help.
Troubleshooting Network Communication
If the cRIO-9074XT cannot communicate with the network, you can perform the following
troubleshooting steps.
1. Move the IP RESET switch to the ON position.
2. Push the RESET button to cycle power to the chassis.
3. Configure the IP and other network settings in MAX.
4. Move the IP RESET switch to the OFF position.
Note The network behavior of the chassis after powering up with the IP
RESET switch on depends on the version of LabVIEW RT installed. Visit
ni.com/info and enter the Info Code ipconfigcrio for information about the
different network behaviors with different software versions.
Restoring the BIOS Network Settings
If you are unable to fix network communication with the LabVIEW RT network settings
restored, you can restore the BIOS network settings of the chassis. Refer to the Connecting the
Chassis to a Network section of this document for information about the BIOS network
16 | ni.com | NI cRIO-9074XT User Manual and Specifications

settings for different chassis revisions. Complete the following steps to restore the BIOS
network settings of the chassis.
1. Move the IP RESET and SAFE MODE switches to the ON position.
2. Push the RESET button to cycle power to the chassis.
3. Configure the IP and other network settings in MAX.
4. Move the IP RESET and SAFE MODE switches to the OFF position.
Note If the chassis is restored to the BIOS network settings, the LabVIEW
run-time engine does not load. You must reconfigure the network settings and
restart the chassis for the LabVIEW run-time engine to load.
cRIO-9074XT Specifications
The following specifications are typical for the range -40 °C to 70 °C unless otherwise noted.
Caution Do not operate the cRIO-9074XT in a manner not specified in this
document. 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 NI for repair.
Network
Network interface 10Base-T and 100Base-TX Ethernet
Compatibility IEEE 802.3
Communication rates 10 Mbps, 100 Mbps, auto-negotiated
Maximum cabling distance 100 m/segment
RS-232 Serial Port
Maximum baud rate 115,200 bps
Data bits 5, 6, 7, 8
Stop bits 1, 2
Parity Odd, Even, Mark, Space
Flow control RTS/CTS, XON/XOFF, DTR/DSR
SMB Connector
Output Characteristics
Minimum high-level output voltage
With -100 µA output current 2.9 V
With -16 mA output current 2.4 V
With -24 mA output current 2.3 V
NI cRIO-9074XT User Manual and Specifications | © National Instruments | 17

Maximum low-level output voltage
With 100 µA output current 0.10 V
With 16 mA output current 0.40 V
With 24 mA output current 0.55 V
Driver type CMOS
Maximum sink/source current ±24 mA
Maximum 3-state output leakage
current
±5 µA
Input Characteristics
Minimum input voltage 0 V
Minimum low-level input voltage 0.94 V
Maximum high-level input voltage 2.43 V
Maximum input voltage 5.5 V
Typical input capacitance 2.5 pF
Typical resistive strapping 1 kΩ to 3.3 V
Memory
Nonvolatile 256 MB minimum
DRAM 128 MB
For information about the life span of the nonvolatile memory and about best practices for
using nonvolatile memory, go to ni.com/info and enter the Info Code SSDBP.
Reconfigurable FPGA
FPGA type Xilinx Spartan-3 2M
Number of flip-flops 40,960
Number of 4-input LUTs 40,960
Number of multipliers 40
Available block RAM 720 kbits
Number of DMA channels 3
Internal Real-Time Clock
Accuracy 200 ppm; 35 ppm at 25 °C
18 | ni.com | NI cRIO-9074XT User Manual and Specifications

Power Requirements
Voltage input range 19 V to 30 V
Maximum power input 20 W
Maximum power consumption 20 W
Physical Characteristics
If you need to clean the module, wipe it with a dry towel.
Tip For two-dimensional drawings and three-dimensional models of the C Series
module and connectors, visit ni.com/dimensions and search by module number.
Screw-terminal wiring
Gauge 0.13 mm 2 to 2.1 mm2 (26 AWG to 14 AWG)
copper conductor wire
Wire strip length 6 mm (0.24 in.) of insulation stripped from the
end
Temperature rating 85 °C
Torque for screw terminals 0.20 N · m to 0.25 N · m (1.8 lb · in. to
2.2 lb · in.)
Wires per screw terminal One wire per screw terminal
Ferrules 0.25 mm2 to 1.5 mm2
Connector securement
Securement type Screw flanges provided
Torque for screw flanges 0.3 N · m to 0.4 N · m (2.7 lb · in. to
3.5 lb · in.)
Dimensions (unloaded) 286.4 mm × 88.1 mm × 58.9 mm
(11.3 in. × 3.5 in. × 2.3 in.)
Weight 929 g (32.7 oz)
Safety Voltages
Connect only voltages that are within the following limits:
V terminal to C terminal 35 V maximum, Measurement Category I
Measurement Category I is for measurements performed on circuits not directly connected to
the electrical distribution system referred to as MAINS voltage. MAINS is a hazardous live
electrical supply system that powers equipment. This category is for measurements of voltages
from specially protected secondary circuits. Such voltage measurements include signal levels,
NI cRIO-9074XT User Manual and Specifications | © National Instruments | 19

special equipment, limited-energy parts of equipment, circuits powered by regulated low-
voltage sources, and electronics.
Caution Do not connect the cRIO-9074XT to signals or use for measurements
within Measurement Categories II, III, or IV.
Note Measurement Categories CAT I and CAT O are equivalent. These test and
measurement circuits are not intended for direct connection to the MAINS building
installations of Measurement Categories CAT II, CAT III, or CAT IV.
Hazardous Locations
U.S. (UL) Class I, Division 2, Groups A, B, C, D, T4;
Class I, Zone 2, AEx nA IIC T4
Canada (C-UL) Class I, Division 2, Groups A, B, C, D, T4;
Class I, Zone 2, Ex nA IIC T4
Europe (ATEX) and International (IECEx) Ex nA IIC T4 Gc
Safety and Hazardous Locations Standards
This product is designed to meet the requirements of the following electrical equipment safety
standards for measurement, control, and laboratory use:
• IEC 61010-1, EN 61010-1
• UL 61010-1, CSA 61010-1
• EN 60079-0:2012, EN 60079-15:2010
• IEC 60079-0: Ed 6, IEC 60079-15; Ed 4
• UL 60079-0; Ed 5, UL 60079-15; Ed 3
• CSA 60079-0:2011, CSA 60079-15:2012
Note For UL and other safety certifications, refer to the product label or the Online
Product Certification section.
Electromagnetic Compatibility
This product meets the requirements of the following EMC standards for electrical equipment
for measurement, control, and laboratory use:
• EN 61326 (IEC 61326): Class A emissions; Industrial immunity
• EN 55011 (CISPR 11): Group 1, Class A emissions
• AS/NZS CISPR 11: Group 1, Class A emissions
• FCC 47 CFR Part 15B: Class A emissions
• ICES-001: Class A emissions
Note For EMC declarations and certifications, and additional information, refer to
the Online Product Certification section.
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