National Instruments Network Card NI PXI 8250 User Manual

PXI  
NI PXI-8250 User Manual  
National Instruments System Monitor Hardware  
NI PXI-8250 User Manual  
July 2008  
372605A-01  
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Important Information  
Warranty  
The NI PXI-8250 is warranted against defects in materials and workmanship for a period of one year from the date of shipment, as evidenced  
by receipts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to be defective during the  
warranty period. This warranty includes parts and labor.  
The media on which you receive National Instruments software are warranted not to fail to execute programming instructions, due to defects in  
materials and workmanship, for a period of 90 days from date of shipment, as evidenced by receipts or other documentation. National Instruments  
will, at its option, repair or replace software media that do not execute programming instructions if National Instruments receives notice of such defects  
during the warranty period. National Instruments does not warrant that the operation of the software shall be uninterrupted or error free.  
A Return Material Authorization (RMA) number must be obtained from the factory and clearly marked on the outside of the package before any  
equipment will be accepted for warranty work. National Instruments will pay the shipping costs of returning to the owner parts which are covered by  
warranty.  
National Instruments believes that the information in this document is accurate. The document has been carefully reviewed for technical accuracy. In  
the event that technical or typographical errors exist, National Instruments reserves the right to make changes to subsequent editions of this document  
without prior notice to holders of this edition. The reader should consult National Instruments if errors are suspected. In no event shall National  
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Patents  
For patents covering National Instruments products, refer to the appropriate location: Help»Patents in your software, the patents.txtfile  
on your media, or ni.com/patents.  
WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS  
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About This Manual  
Chapter 1  
About the NI PXI-8250 Module ....................................................................................1-1  
What You Need to Get Started ......................................................................................1-2  
Chapter 2  
Software Installation......................................................................................................2-1  
Chapter 3  
Front Panel LEDs...........................................................................................................3-4  
System Status LEDs ........................................................................................3-5  
Front Panel Connector ...................................................................................................3-5  
Alert Relay Pins...............................................................................................3-7  
Power Output Pins...........................................................................................3-7  
Appendix A  
Specifications  
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Contents  
Technical Support and Professional Services  
Glossary  
Index  
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About This Manual  
The NI PXI-8250 User Manual describes the features of the NI PXI-8250,  
and contains information about configuring and operating the hardware.  
Conventions  
The following conventions are used in this manual:  
»
The » symbol leads you through nested menu items and dialog box options  
to a final action. The sequence File»Page Setup»Options directs you to  
pull down the File menu, select the Page Setup item, and select Options  
from the last dialog box.  
This icon denotes a note, which alerts you to important information.  
This icon denotes a caution, which advises you of precautions to take to  
avoid injury, data loss, system crash, product damage, or product  
malfunction. When this symbol is marked on the product, refer to the Read  
Me First: Safety and Radio-Frequency Interference document, shipped  
with the product, for precautions to take.  
bold  
Bold text denotes items that you must select or click in the software, such  
as menu items and dialog box options. Bold text also denotes parameter  
names.  
italic  
Italic text denotes variables, emphasis, a cross-reference, or an introduction  
to a key concept. Italic text also denotes text that is a placeholder for a word  
or value that you must supply.  
monospace  
Text in this font denotes text or characters that you should enter from the  
keyboard, sections of code, programming examples, and syntax examples.  
This font is also used for the proper names of disk drives, paths, directories,  
programs, subprograms, subroutines, device names, functions, operations,  
variables, filenames, and extensions.  
NI PXI-1042/1042Q  
NI PXI-1042/1042Q indicates that either an NI PXI-1042 or  
NI PXI-1042Q chassis may be used. When the NI PXI-1042Q chassis is  
referred to alone in the text, then the text is not relevant to the NI PXI-1042  
chassis.  
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About This Manual  
Related Documentation  
The following documents contain information that you might find helpful  
as you read this manual:  
IEEE 1101.1-1991, IEEE Standard for Mechanical Core  
Specifications for Microcomputers Using IEC 603-2 Connectors  
IEEE 1101.10, IEEE Standard for Additional Mechanical  
Specifications for Microcomputers Using IEEE 1101.1 Equipment  
Practice  
PICMG EXP.0 R1.0 CompactPCI Express Specification,  
PCI Industrial Computers Manufacturers Group  
PCI Express Base Specification, Revision 1.1, PCI Special Interest  
Group  
PXI-5 PXI Express Hardware Specification, Revision 1.0,  
PXI Systems Alliance  
NI System Monitor 1.1 Help  
NI PXI-8250 User Manual  
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1
Getting Started  
This chapter includes information about the features of the NI PXI-8250  
and information about operating the hardware.  
About the NI PXI-8250 Module  
The NI PXI-8250 module monitors the status parameters of a chassis and  
displays the status information with front panel LEDs and an alert relay.  
Features  
NI PXI-8250 can be used with an NI PXI-1042, NI PXI-1042Q, or  
NI PXI-1045 chassis to detect and report chassis voltage rail problems,  
out-of-range chassis intake temperature, or chassis power shuttle fan  
failure. The NI PXI-8250 monitors the status of these parameters and  
reports the status through a set of LEDs on the front panel of the module.  
The NI PXI-8250 also includes a relay that toggles when any of the  
parameters fall outside of specification during chassis operation. These  
features can be used to monitor the state of the chassis and easily identify  
system failure.  
The NI PXI-8250 comes with NI System Monitor software that includes the  
driver for the module and an application programming interface (API) that  
allows programmatic access to the information reported by the module.  
Although the driver allows for proper detection of the hardware, it is not  
required for the normal operation of the six system status LEDs, the  
alert relay, or the power outputs of the NI PXI-8250.  
There is also a set of six user LEDs on the front panel of the NI PXI-8250  
designed for custom alert configurations. This feature is not available  
with NI System Monitor 1.1, and may be added in future releases of  
NI System Monitor. Refer to the NI System Monitor Help for more  
information.  
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Chapter 1  
Getting Started  
What You Need to Get Started  
To set up and use the NI PXI-8250 module, you must have the following  
items:  
An NI PXI-8250 System Monitor module  
An NI PXI-1042, NI PXI-1042Q, or NI PXI-1045 chassis  
This manual  
Optional: The NI System Monitor 1.1 driver software and  
documentation  
Software Programming Choices  
The NI System Monitor software includes a simple but powerful high-level  
application programming interface (API) that makes creating custom  
applications for the NI PXI-8250 easy. Refer to the  
NI System Monitor 1.1 Help for information on the API.  
Safety Information  
Caution The following paragraphs contain important safety information you must follow  
when installing and operating the NI PXI-8250, and all devices connecting to the  
NI PXI-8250.  
Do not operate the device in a manner not specified in this document.  
Misuse of the device can result in a hazard. You can compromise the safety  
protection built into the device if the device is damaged in any way. If the  
device is damaged, return it to National Instruments (NI) for repair.  
Do not substitute parts or modify the device except as described in this  
document. Use the device only with the chassis, specified in the installation  
instructions. You must have all covers and filler panels installed during  
operation of the device.  
Do not operate the device in an explosive atmosphere or where there may  
be flammable gases or fumes. If you must operate the device in such an  
environment, it must be in a suitably rated enclosure.  
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If you need to clean the device, use a soft, nonmetallic brush. Make sure  
that the device is completely dry and free from contaminants before  
returning it to service.  
Operate the device only at or below Pollution Degree 2. Pollution is foreign  
matter in a solid, liquid, or gaseous state that can reduce dielectric strength  
or surface resistivity. The following is a description of pollution degrees:  
Pollution Degree 1 means no pollution or only dry, nonconductive  
pollution occurs. The pollution has no influence.  
Pollution Degree 2 means that only nonconductive pollution occurs in  
most cases. Occasionally, however, a temporary conductivity caused  
by condensation must be expected.  
Pollution Degree 3 means that conductive pollution occurs, or dry,  
nonconductive pollution occurs that becomes conductive due to  
condensation.  
Note The NI PXI-8250 is intended for indoor use only.  
You must insulate signal connections for the maximum voltage for which  
the device is rated. Do not exceed the maximum ratings for the device. Do  
not install wiring while the device is live with electrical signals. Do not  
remove or add connector blocks when power is connected to the system.  
Remove power from signal lines before connecting them to or  
disconnecting them from the device.  
Operate the device at or below the installation category1 marked on the  
hardware label. Measurement circuits are subjected to working voltages2  
and transient stresses (overvoltage) from the circuit to which they are  
connected during measurement or test. Installation categories establish  
standard impulse withstand voltage levels that commonly occur in  
electrical distribution systems. The following is a description of installation  
categories:  
Installation Category I is for measurements performed on circuits not  
directly connected to the electrical distribution system referred to as  
MAINS3 voltage. This category is for measurements of voltages from  
specially protected secondary circuits. Such voltage measurements  
include signal levels, special equipment, limited-energy parts of  
1
2
3
Installation categories, also referred to as measurement categories, are defined in electrical safety standard IEC 61010-1.  
Working voltage is the highest rms value of an AC or DC voltage that can occur across any particular insulation.  
MAINS is defined as a hazardous live electrical supply system that powers equipment. Suitably rated measuring circuits may  
be connected to the MAINS for measuring purposes.  
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Chapter 1  
Getting Started  
equipment, circuits powered by regulated low-voltage sources, and  
electronics.  
Installation Category II is for measurements performed on circuits  
directly connected to the electrical distribution system. This category  
refers to local-level electrical distribution, such as that provided by a  
standard wall outlet (for example, 115 AC voltage for U.S. or 230 AC  
voltage for Europe). Examples of Installation Category II are  
measurements performed on household appliances, portable tools, and  
similar devices/modules.  
Installation Category III is for measurements performed in the building  
installation at the distribution level. This category refers to  
measurements on hard-wired equipment such as equipment in fixed  
installations, distribution boards, and circuit breakers. Other examples  
are wiring, including cables, bus bars, junction boxes, switches, socket  
outlets in the fixed installation, and stationary motors with permanent  
connections to fixed installations.  
Installation Category IV is for measurements performed at the primary  
electrical supply installation (<1,000 V). Examples include electricity  
meters and measurements on primary overcurrent protection devices  
and on ripple control units.  
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2
Configuration and Installation  
This chapter describes how to configure and install the NI PXI-8250.  
Software Installation  
Before installing the NI PXI-8250, install the NI System Monitor driver  
software. Refer to the NI System Monitor 1.1 Help for specific installation  
instructions.  
Notes It is necessary to install the NI System Monitor driver software before attempting to  
use the NI PXI-8250, or the system will not recognize the NI PXI-8250 and you will be  
unable to configure or use the device.  
The NI PXI-8250 will not be visible in Measurement & Automation Explorer (MAX) even  
after proper installation. You can see the module in Windows Device Manager once the  
installation process is complete and Device Manager has been refreshed.  
When adding or removing an NI PXI-8250 module from a Windows XP/2000/NT system,  
you must be logged on with administrator-level permission. The NI PXI-8250 will not be  
viewable in Measurement & Automation Explorer (MAX) at any time.  
Hardware Installation  
The following instructions are for general module installation in the  
specified chassis. Consult the PXI chassis user manual for a given chassis  
for chassis-specific instructions and warnings related to installation or  
module configuration.  
Cautions The NI PXI-8250 module may sustain damage or inflict damage on adjacent  
modules if improperly installed.  
Proper slot selection is required for the operation of this module. If the module is installed  
in any other slot, the module will not operate and could potentially cause other adjacent  
modules to not operate. Appendix A, Specifications, lists the typical power required for the  
NI PXI-8250 module.  
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Chapter 2  
Configuration and Installation  
The NI PXI-8250 is a sensitive electronic device shipped in an antistatic bag. Open only at  
an approved workstation and observe precautions for handling electrostatic-sensitive  
devices.  
Note Install the NI PXI-8250 in only the right-most slot of an NI PXI-1042/1042Q or  
NI PXI-1045. As such, the NI PXI-8250 should only be installed in slot 8 of an  
NI PXI-1042/1042Q chassis or slot 18 of an NI PXI-1045 chassis.  
Complete the following steps to install the NI PXI-8250 module.  
1. Power off and unplug the chassis.  
Caution To protect yourself and the computer from electrical hazards, the chassis must  
remain unplugged until the installation is complete.  
2. Locate the rightmost (last numbered) slot of the NI PXI-1042/1042Q  
or NI PXI-1045 chassis and ensure it is unused. If occupied, relocate  
the module or remove the filler panel. Refer to Figure 2-1 for the  
location of this slot on the NI PXI-1042/1042Q chassis, and Figure 2-2  
for the location of this slot on the NI PXI-1045 chassis.  
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Chapter 2  
Configuration and Installation  
NI PXI-1042Q  
Slot 8  
Figure 2-1. Location of NI PXI-1042Q Slot for NI PXI-8250 Support  
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Chapter 2  
Configuration and Installation  
NI PXI-1045  
Slot 18  
Figure 2-2. Location of NI PXI-1045 Slot for NI PXI-8250 Support  
3. Touch a metal part on the chassis to discharge any static electricity that  
might be on your clothes or body. Static electricity can damage the  
hardware.  
4. Insert the NI PXI-8250 module into the rightmost slot of an  
NI PXI-1042/1042Q or NI PXI-1045. The correct position is slot 8 for  
the NI PXI-1042/1042Q and slot 18 for the NI PXI-1045, as shown in  
Figure 2-1 and Figure 2-2, respectively. Use the injector/ejector handle  
to fully inject the device into place.  
5. Screw the front panel of the NI PXI-8250 to the front panel mounting  
rails of the chassis.  
6. Install a system controller or verify that a system controller has been  
installed in the controller slot.  
7. Plug in and power on the chassis.  
8. Plug in and power on the host computer if using a remote controller in  
the chassis.  
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Chapter 2  
Configuration and Installation  
9. Allow the operating system to properly detect and identify the  
NI PXI-8250 module.  
10. Launch Windows Device Manager and refresh the view.  
The NI PXI-8250 module should be visible in Windows Device Manager.  
NI PXI-8250 Configuration  
The NI PXI-8250 module is fully compatible with the industry standard  
PXI Specification, Revision 2.2, and the PCI Local Bus Specification,  
Revision 3.0, respectively. This compatibility allows the PXI system to  
automatically perform all bus-related configuration and requires no user  
interaction. Since the NI PXI-8250 does not require configuration, it will  
not show up in MAX.  
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3
Hardware Overview  
This chapter presents an overview of the NI PXI-8250 functionality.  
Figure 3-1, Figure 3-2, and Figure 3-3 show the locations of key features  
for the NI PXI-8250 module.  
1
2
3
4
7
6
5
1
2
3
4
Assembly Part Number Label  
Serial Number Label  
Safety Symbols (Refer to Figure 3-3 for details)  
PXI/CompactPCI Connectors  
5
6
7
One-Blow Fuses  
Self-Resetting Fuses  
Relay  
Figure 3-1. NI PXI-8250 Parts Locator Diagram  
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Chapter 3  
Hardware Overview  
1
2
3
1
2
System Status LEDs  
User LEDs  
3
Front Panel Connector  
(Relay/Power Outputs)  
Figure 3-2. NI PXI-8250 Front Panel Diagram  
1
2
3
1
2
3
Identification Number Used in Australia  
Symbol Indicating FFC Compliance  
Symbol to Alert User to Read the Manual  
Figure 3-3. Symbols on the Back of the NI PXI-8250  
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Chapter 3  
Hardware Overview  
System Monitoring Architecture  
With the NI PXI-8250, you can simultaneously monitor intake  
temperature, fan speeds, and power supply levels of your NI PXI chassis.  
This information allows the user to achieve a higher level of system  
performance reliability. Once the first set of data is processed, these status  
parameters will also light up the top six LEDs on the front panel. The LEDs  
light either as green if the status parameter is in range, or red if the  
parameter is out of range. Refer to the Front Panel LEDs section for more  
information on the LEDs.  
A custom FPGA on the NI PXI-8250 communicates with the power supply  
module of the chassis for status information. Upon boot-up, the  
NI PXI-8250 waits 7 seconds for the chassis sensors to acquire their first  
value. Once the wait period is over, the NI PXI-8250 begins acquisition of  
the first full set of data from the chassis. The status information is then  
obtained every 5 seconds automatically in hardware until the controller is  
rebooted or shutdown.  
Voltage Rail Level Monitoring  
The NI PXI-8250 module monitors the +5 V, +3.3 V, +12 V, and –12 V  
rails delivered by the power supply shuttle within an accuracy of 100 mV.  
The data from the +5 V and +3.3 V rails have two significant figures, while  
the data from the +12 V and –12 V rails have one significant figure.  
Each power rail has its own status LED on the front panel to reflect the  
current status of the rail. If the voltage rail is within 5% of the common  
chassis specification, then the LED will light green. Otherwise, the LED  
will light red.  
The voltage rail level monitoring feature of the NI PXI-8250 reports when  
a voltage rail goes out of spec. This information is useful in ensuring proper  
operating conditions for each PXI module.  
Temperature Monitoring  
The NI PXI-8250 provides monitoring of the single intake thermistor  
located in the power supply shuttle of the PXI chassis. The reading from the  
thermistor (0–50 °C) is compared to the operating range of the chassis. If  
the reading is in range, the TEMP LED will light green. Otherwise, it will  
light red. All temperature measurements are reported in Celsius and are  
accurate to within 1 °C of the actual intake temperature.  
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Chapter 3  
Hardware Overview  
Fan Monitoring  
The NI PXI-8250 module allows the user to monitor the revolutions per  
minute (RPM) of all rear-facing fans of a PXI chassis (two fans in an  
NI PXI-1042/1042Q and three fans in an NI PXI-1045), accurate to  
50 RPM. The fan data from the chassis is interpreted by the NI PXI-8250  
and the FAN front panel LED reflects the status of all of the fans  
collectively together. Hence, if one or more of the fans becomes  
non-operational (status below 1500 RPM) the LED will turn red to indicate  
a fan error. Otherwise, the fan LED will light green if all of the fans are  
operating within normal tolerances.  
Additional Monitoring Features  
In addition to the system status monitoring features, the NI PXI-8250  
module includes an alert relay and fused power outputs. These features are  
useful for user-defined monitoring applications. Refer to the Front Panel  
Connector section for more information on the fused power outputs.  
Front Panel LEDs  
The NI PXI-8250 has 12 front panel LEDs, including 6 system status LEDs  
and 6 user-configured LEDs, as shown in Figure 3-4. Upon boot, all  
12 LEDs will flash orange while it is being configured. The module then  
turns the LEDs off for 7 seconds until the first valid sample set is acquired.  
1
2
1
System Status LEDs (x6)  
2
User LEDs (x6)  
Figure 3-4. NI PXI-8250 Front Panel LED Diagram  
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System Status LEDs  
There are 6 system status LEDs to report the status of the +5 V, +3.3 V,  
+12 V, and –12 V power rails, the intake temperature of the chassis, and the  
overall status of the power shuttle fans of the chassis. These LEDs only  
light up either red or green depending on whether the status information  
shows the parameters in the specified range. The criteria for the system  
status LEDs to light green is provided in Table 3-1. The acceptable range  
for voltage rail data is 5%, 0–50 °C for the intake temperature reading,  
and 1500+ RPM for fan speed. Any data acquired outside of these ranges  
will be reflected as a red-lit LED.  
Table 3-1. System Status LED Green State Criteria  
Parameter  
+5 V rail  
Criteria for Green LED status  
5% from nominal  
+3.3 V rail  
+12 V rail  
–12 V rail  
Fans  
5% from nominal  
5% from nominal  
5% from nominal  
>1500 RPM for all fans  
0–50 °C  
Temperature  
User LEDs  
The 6 user LEDs are driven by implementing them in software. Refer to the  
NI System Monitor 1.1 Help for more information on developing  
applications for the NI PXI-8250.  
Front Panel Connector  
The NI PXI-8250 has one 8-pin connector on the lower section of the front  
panel. The 8-pin connector provides the three connections for the relay, as  
well as five connections for the fused power outputs. The three relay pins  
included normally closed (NC), normally open (NO), and common (COM)  
ports to the electromechanical relay. The five power output connections  
include fused pins to +5V, +3.3V, +12V, –12V, and ground.  
Caution Power off all devices before connecting or disconnecting the NI PXI-8250 plug.  
Failure to do so may damage the module.  
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Hardware Overview  
Figure 3-5 shows the layout of this connector.  
NO (Normally Open)  
1
2
COM (Common)  
NC (Normally Closed)  
5V  
3.3V  
12V  
-12V  
GND (Ground)  
1
Alert Relay Terminal Pins  
2
Fused Power Output Terminal Pins  
Figure 3-5. NI PXI-8250 Front Panel Connector Pinout Diagram  
NO (Normally Open)  
Chassis off  
COM (Common)  
(or power off)  
NC (Normally Closed)  
NO (Normally Open)  
Initial power up  
COM (Common)  
COM (Common)  
COM (Common)  
of chassis (7 seconds)  
NC (Normally Closed)  
NO (Normally Open)  
Chassis on  
without error(s)  
NC (Normally Closed)  
NO (Normally Open)  
Chassis on  
with error(s)  
NC (Normally Closed)  
Figure 3-6. NI PXI-8250 Relay Operation Diagram  
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Chapter 3  
Hardware Overview  
Alert Relay Pins  
The NI PXI-8250 has an electromechanical non-latching relay with three  
ports: normally open (NO), normally closed (NC), and common (COM).  
The top three pins of the front panel connector are connected to a relay as  
indicated in Figure 3-5. This relay is useful for a creating a custom external  
warning indicator circuit, such as a factory warning light or speaker.  
During normal operation without any system status errors, the relay will  
have COM connected to NO (and not NC). Once a system status error has  
occurred (for instance. if the voltage rail level is out of range), the relay will  
flip to connect COM to NC, rather than NO. Refer to Figure 3-6 for other  
relay status information.  
Notes For a use case where a warning light or speaker should be active (connected) to  
show an error, connect from the COM to the NC port.  
For a use case where a warning light or speaker should be active (connected) to show  
proper, in-spec operation, connect from the COM to the NO port.  
The relay alerts an error by connecting COM to NC when the chassis is  
powered off or loses power. The relay on the NI PXI-8250 is rated to 30 V  
and 1 A switching/carry current. Any connections to the relay on the  
NI PXI-8250 must have a wire length less than 20 meters.  
Power Output Pins  
The lower 5 pins of the 8-pin front panel connector are general purpose  
power outputs connected to each voltage rail of the power supply. Refer to  
Figure 3-5 for the location of the power output pins. The +5 V, +3.3 V,  
+12 V, and –12 V rails are all available from these connector pins along  
with a ground connection at the bottom. These pins draw power from the  
chassis power supply and are protected from current over-draw with  
self-resetting fuses. Table 3-2 lists the maximum power output ratings for  
each voltage rail.  
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Chapter 3  
Hardware Overview  
Table 3-2. Fused Power Output Ratings  
Voltage Rail Maximum Allowed Current Draw  
+5.0 V  
+3.3 V  
+12.0 V  
–12.0 V  
0.75 A  
0.75 A  
0.25 A  
0.25 A  
The NI PXI-8250 has self-resetting fuses rated at 1 A/125 V on the front  
end and one-blow fuses rated at 4 A/125 V on the back end of the card to  
protect the card from excessive current draw. Refer to Figure 3-1 for the  
locations of these fuses.  
When current is exceeded on any of the rails (the current limits are provided  
in Table 3-2), the self-resetting fuses will open the circuit. These fuses are  
designed to reset themselves and do not need to be repaired.  
As a fail-safe, one blow fuses have also been added to ensure that excessive  
current is stopped if a self-resetting fuse fails to operate properly. In the  
event that any of the one-blow fuses blow, the board must be returned for  
repair.  
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A
Specifications  
This appendix lists the hardware and software performance specifications  
for the PXI-8250. Hardware specifications are typical at 25 °C, unless  
otherwise stated.  
Caution Specifications are subject to change without notice.  
Maximum Power Requirements  
Without power outputs  
+5 V ( 5%)..................................... 0.10 A  
+3.3 V ( 5%).................................. 0.50 A  
+12 V ( 5%)................................... 0 A  
–12 V ( 5%) ................................... 0 A  
Power consumption......................... 2.15 W  
With power outputs  
+5 V ( 5%)..................................... 0.85 A  
+3.3 V ( 5%).................................. 1.25 A  
+12 V ( 5%)................................... 0.25 A  
–12 V ( 5%) ................................... 0.25 A  
Power consumption......................... 14.38 W  
Maximum Current for Fused Power Output  
+5V rail .................................................. 0.75 A  
+3.3V rail ............................................... 0.75 A  
+12V rail ................................................ 0.25 A  
–12V rail ................................................ 0.25 A  
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Appendix A  
Specifications  
Monitoring Alert Limits (Green Status LEDs)  
Voltage rail level .................................... 5% (from nominal)  
Intake temperature ..................................0–50 °C  
Fan speed ................................................1,500 RPM or more for all fans  
in a chassis  
Monitoring Accuracy  
Voltage rail level readings...................... 100 mV  
Intake temperature readings.................... 1 °C  
Fan speed readings.................................. 50 RPM  
Alert Relay Specification  
Max current (switching/carry)................1 A  
Max voltage ............................................30 V  
Max power..............................................30 W  
Max cable length ....................................20 m  
Connectors  
Physical  
Front panel connector .............................8-pin 3.5 mm pitch,  
screw-flange connector  
Front panel dimensions...........................3U × 4 HP  
Overall dimensions.................................13.34 × 2.03 cm (5.25 × 0.8 in.)  
Weight ....................................................150 g (5.29 oz)  
Environment  
Maximum altitude...................................2,000 m (800 mbar)  
(at 25 °C ambient temperature)  
Pollution Degree.....................................2  
Indoor use only.  
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Appendix A  
Specifications  
Operating Environment  
Ambient temperature range.................... 0 to 55 °C  
(Tested in accordance with  
IEC-60068-2-1 and  
IEC-60068-2-2. Meets  
MIL-PRF-28800F Class 3 low  
temperature limit and  
MIL-PRF-28800F Class 2 high  
temperature limit.)  
Relative humidity range......................... 10% to 90%, noncondensing  
(Tested in accordance with  
IEC-60068-2-56.)  
Storage Environment  
Ambient temperature range.................... –40 to 70 °C  
(Tested in accordance with  
IEC-60068-2-1 and  
IEC-60068-2-2. Meets  
MIL-PRF-28800F Class 3 limits.)  
Relative humidity range......................... 5% to 95% noncondensing  
(Tested in accordance with  
IEC-60068-2-56.)  
Shock and Vibration  
Operating shock ..................................... 30 g peak, half-sine, 11 ms pulse  
(Tested in accordance with  
IEC-60068-2-27. Meets  
MIL-PRF-28800F Class 2 limits.)  
Random vibration  
operating................................................. 5 to 500 Hz, 0.3 grms  
Non-operating ........................................ 5 to 500 Hz, 2.4 grms  
(Tested in accordance with  
IEC-60068-2-64. Nonoperating  
test profile exceeds the  
requirements of  
MIL-PRF-28800F, Class 3.)  
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Appendix A  
Specifications  
Safety  
This product meets the requirements of the following standards of safety  
for electrical equipment for measurement, control, and laboratory use:  
IEC 61010-1, EN 61010-1  
UL 61010-1, CSA 61010-1  
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; Basic 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 the standards applied to assess the EMC of this product, refer to the Online  
Product Certification section.  
Note For EMC compliance, operate this product according to the documentation.  
CE Compliance  
This product meets the essential requirements of applicable European  
Directives as follows:  
2006/95/EC; Low-Voltage Directive (safety)  
2004/108/EC; Electromagnetic Compatibility Directive (EMC)  
Online Product Certification  
Refer to the product Declaration of Conformity (DoC) for additional  
regulatory compliance information. To obtain product certifications and  
the DoC for this product, visit ni.com/certification, search by model  
number or product line, and click the appropriate link in the Certification  
column.  
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Appendix A  
Specifications  
Environmental Management  
NI is committed to designing and manufacturing products in an  
environmentally responsible manner. NI recognizes that eliminating  
certain hazardous substances from our products is beneficial to the  
environment and to NI customers.  
For additional environmental information, refer to the NI and the  
Environment Web page at ni.com/environment. This page contains the  
environmental regulations and directives with which NI complies, as well  
as other environmental information not included in this document.  
Waste Electrical and Electronic Equipment (WEEE)  
EU Customers At the end of the life cycle, all products must be sent to a WEEE recycling  
center. For more information about WEEE recycling centers and National Instruments  
WEEE initiatives, visit ni.com/environment/weee.  
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⊩ ˄Ё೑  
˅
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Փ⫼ᶤѯ᳝ᆇ⠽䋼ᣛҸ  
DŽ
National Instruments  
National Instruments  
(RoHS)  
Ё೑  
ড়㾘ᗻֵᙃˈ䇋ⱏᔩ ni.com/environment/rohs_chinaDŽ  
RoHS  
ni.com/environment/rohs_china  
(For information about China RoHS compliance, go to  
.)  
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B
Technical Support and  
Professional Services  
Visit the following sections of the award-winning National Instruments  
Web site at ni.comfor technical support and professional services:  
Support—Technical support resources at ni.com/supportinclude  
the following:  
Self-Help Technical Resources—For answers and solutions,  
visit ni.com/supportfor software drivers and updates, a  
searchable KnowledgeBase, product manuals, step-by-step  
troubleshooting wizards, thousands of example programs,  
tutorials, application notes, instrument drivers, and so on.  
Registered users also receive access to the NI Discussion Forums  
at ni.com/forums. NI Applications Engineers make sure every  
question submitted online receives an answer.  
Standard Service Program Membership—This program  
entitles members to direct access to NI Applications Engineers  
via phone and email for one-to-one technical support as well as  
exclusive access to on demand training modules via the Services  
Resource Center. NI offers complementary membership for a full  
year after purchase, after which you may renew to continue your  
benefits.  
For information about other technical support options in your  
area, visit ni.com/services, or contact your local office at  
ni.com/contact.  
Training and Certification—Visit ni.com/trainingfor  
self-paced training, eLearning virtual classrooms, interactive CDs,  
and Certification program information. You also can register for  
instructor-led, hands-on courses at locations around the world.  
System Integration—If you have time constraints, limited in-house  
technical resources, or other project challenges, National Instruments  
Alliance Partner members can help. To learn more, call your local  
NI office or visit ni.com/alliance.  
© National Instruments Corporation  
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Appendix B  
Technical Support and Professional Services  
Declaration of Conformity (DoC)—A DoC is our claim of  
compliance with the Council of the European Communities using  
the manufacturer’s declaration of conformity. This system affords  
the user protection for electromagnetic compatibility (EMC) and  
product safety. You can obtain the DoC for your product by visiting  
ni.com/certification.  
Calibration Certificate—If your product supports calibration,  
you can obtain the calibration certificate for your product at  
ni.com/calibration.  
If you searched ni.comand could not find the answers you need, contact  
your local office or NI corporate headquarters. Phone numbers for our  
worldwide offices are listed at the front of this manual. You also can visit  
the Worldwide Offices section of ni.com/niglobalto access the branch  
office Web sites, which provide up-to-date contact information, support  
phone numbers, email addresses, and current events.  
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Glossary  
Symbol  
Prefix  
pico  
Value  
10–12  
10–9  
10– 6  
10–3  
103  
p
n
nano  
micro  
milli  
kilo  
μ
m
k
M
G
T
mega  
giga  
106  
109  
tera  
1012  
Numbers/Symbols  
°
degrees  
per  
/
%
percent  
plus or minus  
+5 V  
+5 VDC source signal  
+3.3 VDC source signal  
+12 VDC source signal  
–12 VDC source signal  
+3.3 V  
+12 V  
–12 V  
A
A
amperes  
AC  
alternating current  
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Glossary  
API  
application programming interface  
B
backplane  
An assembly, typically a printed circuit board, with connectors and signal  
paths that bus the connector pins.  
C
C
Celsius  
CFR  
cm  
Code of Federal Regulations  
Centimeters  
COM  
A common terminal of the relay that either connects to NO or NC.  
See also NO or NC.  
CompactPCI  
An adaptation of the Peripheral Component Interconnect (PCI)  
Specification 2.1 or later for industrial and/or embedded applications  
requiring a more robust mechanical form factor than desktop PCI. It  
uses industry standard mechanical components and high-performance  
connector technologies to provide an optimized system intended for rugged  
applications. It is electrically compatible with the PCI Specification, which  
enables low-cost PCI components to be utilized in a mechanical form factor  
suited for rugged environments.  
CSA  
Canadian Standards Association  
D
DC  
direct current  
DoC  
driver  
Declaration of Conformity  
Software that communicates commands to control a specific board.  
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Glossary  
E
electromechanical  
relay  
Electromechanical relay made of a coil, an armature mechanism, and  
electrical contacts. When the coil is energized, the induced magnetic field  
moves the armature that opens or closes the contacts.  
EMC  
Electromagnetic Compatibility  
F
FCC  
Federal Communications Commission  
filler panel  
FPGA  
fuse  
A blank module front panel used to fill empty slots in the chassis.  
Field Programmable Gate Array  
A circuit protection device that prevents overcurrent draw.  
See also self-resetting fuse.  
G
g
(1) grams; (2) a measure of acceleration equal to 9.8 m/s2  
gRMS  
A measure of random vibration; the root mean square of acceleration levels  
in a random vibration test profile.  
H
Hz  
Hertz; cycles per second  
I
IEC  
International Electrotechnical Commission—An organization that sets  
international electrical and electronics standards.  
IEEE  
in.  
Institute of Electrical and Electronics Engineers  
inches  
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Glossary  
L
LED  
Light-Emitting Diode  
meters  
M
m
MAX  
Measurement & Automation Explorer—A controlled, centralized  
configuration environment that allows you to configure all of your  
NI devices.  
ms  
milliseconds  
N
NI  
National Instruments  
NO  
The normally-open terminal of a relay that connects to the common (COM)  
terminal only when the relay coil is energized.  
NC  
The normally-closed terminal of a relay that connects to the common  
(COM) terminal only when the relay coil is de-energized.  
O
oz  
ounces  
P
PCI  
Peripheral Component Interconnect—A high-performance expansion bus  
architecture originally developed by Intel to replace ISA and EISA. It offers  
a theoretical maximum transfer rate of 132 MB/s.  
PXI  
PCI eXtensions for Instrumentation  
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Glossary  
R
RMS  
Root Mean Square  
RPM  
revolutions per minute—units for velocity  
S
s
seconds  
self-resetting fuse  
A fuse that acts as an open circuit only when current is overdrawn. Once  
the overdraw ends the fuse returns to normal closed circuit operation.  
system controller  
A module configured for installation in slot 1 of a PXI chassis. This device  
is unique in the PXI system in that it performs the system controller  
functions, including clock sourcing and arbitration for data transfers across  
the backplane. Installing such a device into any other slot can damage the  
device, the PXI backplane, or both.  
U
UL  
Underwriter’s Laboratories  
V
V
volts  
watts  
W
W
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Index  
A
F
about the NI PXI-8250, 1-1  
accuracy, monitoring, A-2  
additional monitoring features, 3-4  
alert limits, monitoring, A-2  
alert relay  
fan monitoring, 3-4  
features of the NI PXI-8250, 1-1  
front panel connector, 3-5  
alert relay pins, 3-7  
power output pins, 3-7  
pins, 3-7  
fused power output specifications, A-1  
C
calibration certificate (NI resources), B-2  
configuration and installation, 2-1  
NI PXI-8250, 2-5  
connector  
H
front panel, 3-5  
hardware  
installation, 2-1  
introduction, 1-1  
conventions used in the manual, vii  
D
specifications, A-1  
Declaration of Conformity (NI resources), B-2  
diagnostic tools (NI resources), B-1  
documentation  
I
conventions used in manual, vii  
drivers (NI resources), B-1  
information, safety, 1-2  
installing  
software, 2-1  
instrument drivers (NI resources), B-1  
E
environmental specifications, A-2  
examples (NI resources), B-1  
K
KnowledgeBase, B-1  
© National Instruments Corporation  
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NI PXI-8250 User Manual  
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Index  
L
P
LEDs  
physical specifications, A-2  
pins  
front panel, 3-4  
user, 3-5  
alert relay, 3-7  
power output, 3-7  
power output pins, 3-7  
programming  
M
API, 1-2  
maximum power requirements  
with power outputs, A-1  
without power outputs, A-1  
monitoring  
accuracy specifications, A-2  
alert limit specifications, A-2  
fan, 3-4  
related documentation, viii  
requirements, maximum power  
voltage rail level, 3-3  
N
services, B-1  
information, 1-2  
specifications, A-4  
shock and vibration specifications, A-3  
NI PXI-8250  
about, 1-1  
configuration, 2-5  
features, 1-1  
installation, 2-1  
NI resources, B-1  
getting started, 1-2  
introduction, 1-1  
specifications, A-1  
alert relay, A-2  
NI support and services, B-1  
environmental, A-2  
outputs), A-1  
maximum power (without power  
outputs), A-1  
monitoring accuracy, A-2  
monitoring alert limits, A-2  
physical, A-2  
O
operating environment specifications, A-3  
overview  
front panel connector, 3-5  
hardware, 3-1  
shock and vibration, A-3  
NI PXI-8250 User Manual  
I-2  
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ni.com  
Index  
support, technical, B-1  
system  
U
monitoring, 3-3  
vibration specifications, A-3  
voltage rail level monitoring, 3-3  
T
technical support, B-1  
temperature monitoring, 3-3  
W
training and certification (NI resources), B-1  
troubleshooting (NI resources), B-1  
Web resources, B-1  
© National Instruments Corporation  
I-3  
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