National Instruments Power Supply NI PXI 1042 Series User Manual

USER GUIDE  
NI PXI-1042 Series  
Power Supply Shuttle  
The NI PXI-1042 Series power supply shuttle is a replacement part for the  
NI PXI-1042 Series chassis.  
Introduction  
To minimize downtime caused by a power-supply failure, the  
NI PXI-1042 Series chassis has a modular power supply shuttle. This  
power supply shuttle includes the chassis power supply, cooling fans, and  
fan-control circuitry. Key features of the power supply shuttle include:  
Universal AC input with automatic voltage and frequency ranging  
Over-current protection via push-reset circuit breaker  
Remote power monitoring and inhibit via a rear-panel connector  
Temperature-sensing module that can adjust fan speed based on  
air-intake temperature to minimize audible noise  
Circuitry to control a front-panel LED that indicates power supply  
failure  
Unpacking  
Carefully inspect the shipping container and the power supply shuttle for  
damage. Check for visible damage to the metal work. Check to make sure  
all handles, hardware, and switches are undamaged. Visually inspect the  
inside of the shuttle for any possible damage, debris, or detached  
components. If damage appears to have been caused during shipment, file  
a claim with the carrier. Retain the packing material for possible inspection  
and/or reshipment.  
 
Installation and Maintenance  
The information in this section is for qualified service personnel only. Read  
the Read Me First: Safety and Radio-Frequency Interference document  
included with your kit before using the power supply shuttle.  
Caution Many components within the NI PXI-1042 Series chassis under repair are  
susceptible to static discharge damage. Service the chassis only in a static-free  
environment. Observe standard handling precautions for static-sensitive devices while  
servicing the chassis. Always wear a grounded wrist strap, or equivalent, while servicing  
the chassis.  
Caution Always disconnect the AC power cable before cleaning or servicing the chassis.  
Caution Never connect the AC power cable to the power supply shuttle until you install it  
in an NI PXI-1042 Series chassis. Do not use, test, or configure the power supply shuttle  
outside of a chassis.  
The power supply shuttle is a replacement part for the NI PXI-1042 Series  
chassis. The NI PXI-1042 User Manual contains all of the most up-to-date  
chassis service procedures, including removal and replacement of power  
supply shuttles. The chassis includes a hardcopy of the NI PXI-1042 User  
Manual; additionally, you can download a softcopy from ni.com/  
support.  
Removal  
Before attempting to replace the power supply shuttle, verify that there is  
adequate clearance behind the chassis. Set the power switch on the front  
panel to the Off (nonrecessed) position and disconnect the power cable  
from the power supply shuttle on the back of the chassis. Identify the eight  
captive mounting screws that attach the power supply shuttle to the chassis.  
Refer to Figure 1 for the mounting screw locations. Using a Phillips  
screwdriver, loosen the captive mounting screws. Pull on the two rear  
handles of the power supply shuttle to remove it from the back of the  
chassis.  
Installation  
Ensure that there is no visible damage to the new power supply shuttle.  
Verify that the housing and connector on the new power supply shuttle  
have no foreign material inside. Remove the protective cap on the  
PXI_CLK10 connector. Install the new power supply shuttle into the  
opening on the rear of the chassis. Tighten the eight captive mounting  
screws with a Phillips screwdriver.  
© National Instruments Corporation  
3
NI PXI-1042 Series Power Supply Shuttle User Guide  
 
Configuration  
The fan-speed selector switch is on the rear panel of the power supply  
shuttle. Refer to Figure 1 to locate the fan-speed selector. Select HIGH for  
maximum cooling performance (recommended) or AUTO for quieter  
operation. When set to AUTO, air-intake temperature determines the fan  
speed.  
Connecting Safety Ground  
Caution The power supply shuttle is designed with a three-position NEMA 5-15 jack that  
connects the ground line to the chassis ground. To minimize shock hazard, make sure the  
electrical power outlet you use to power the chassis has an appropriate earth safety ground.  
If your power outlet does not have an appropriate ground connection, you  
must connect the premise safety ground to the chassis grounding screw.  
Refer to Figure 1 to locate the chassis grounding screw. To connect the  
safety ground, complete the following steps:  
1. Connect a 16 AWG (1.3 mm) wire to the chassis grounding screw  
using a grounding lug. The wire must have green insulation with a  
yellow stripe or must be noninsulated (bare).  
2. Attach the opposite end of the wire to permanent earth ground using  
toothed washers or a toothed lug.  
Specifications  
AC Input  
Input voltage range .................................100 to 240 VAC  
Operating voltage range1 ........................90 to 264 VAC  
Input frequency.......................................50/60 Hz  
Operating frequency range1 ....................47 to 63 Hz  
Input current rating .................................8 A  
Over-current protection ..........................10 A circuit breaker  
Line regulation  
3.3 V ................................................< 0.2%  
5 V ...................................................< 0.1%  
12 V...............................................< 0.1%  
1
The operating range is guaranteed by design.  
NI PXI-1042 Series Power Supply Shuttle User Guide  
4
ni.com  
 
Efficiency............................................... 70% typical  
Power disconnect ................................... The AC power cable provides  
main power disconnect. The  
chassis front-panel power switch  
causes the power supply to  
provide DC power to  
the CompactPCI/PXI backplane.  
DC Output  
DC current capacity (IMP  
)
NI PXI-1042  
NI PXI-1042Q  
0–40 °C  
20 A  
Voltage  
+3.3 V  
+5 V  
0–50 °C  
20 A  
0–55 °C  
18 A  
29 A  
25 A  
29 A  
+12 V Peripheral slots  
+12 V System slot  
–12 V  
3.5 A  
0.5 A  
2 A  
3.5 A  
0.5 A  
2 A  
3.5 A  
0.5 A  
2 A  
Load regulation  
Voltage  
Load Regulation  
+3.3 V  
+12 V  
+5 V  
<5%  
<5%  
<5%  
<5%  
–12 V  
Maximum ripple and noise (20 MHz bandwidth)  
Voltage  
+3.3 V  
+12 V  
+5 V  
Maximum Ripple and Noise  
50 mVpp  
120 mVpp  
50 mVpp  
–12 V  
120 mVpp  
© National Instruments Corporation  
5
NI PXI-1042 Series Power Supply Shuttle User Guide  
 
Over-current protection ..........................All outputs protected from short  
circuit and overload with  
automatic recovery  
Over-voltage protection  
3.3 V and 5 V...................................Clamped at 20 to 30% above  
nominal output voltage  
+12 V and –12 V .............................Clamped at 26 to 29 V difference  
between +12 and –12 V outputs  
Power supply shuttle MTTR...................Replacement in under 5 minutes  
Compliance and Certifications  
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.  
NI PXI-1042 Series Power Supply Shuttle User Guide  
6
ni.com  
 
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.  
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)  
Environmental Management  
National Instruments is committed to designing and manufacturing  
products in an environmentally responsible manner. NI recognizes that  
eliminating certain hazardous substances from our products is beneficial  
not only to the environment but also 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 their 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.htm.  
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(For information about China RoHS compliance, go to  
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© National Instruments Corporation  
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NI PXI-1042 Series Power Supply Shuttle User Guide  
 
 
National Instruments, NI, ni.com, and LabVIEW are trademarks of National Instruments Corporation.  
Refer to the Terms of Use section on ni.com/legal for more information about National  
Instruments trademarks. Other product and company names mentioned herein are trademarks or trade  
names of their respective companies. For patents covering National Instruments products/technology,  
refer to the appropriate location: Help»Patents in your software, the patents.txt file on your  
media, or the National Instruments Patent Notice at ni.com/patents.  
© 2008 National Instruments Corporation. All rights reserved.  
372653A-01  
Sep08  
 

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