Manual do usuário National Instruments PXI-1045

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USER GUIDE
NI PXI-1045 Power Supply Shuttle
This document explains the installation and maintenance of the
NI PXI-1045 power supply shuttle. The NI PXI-1045 power supply shuttle
is a replacement part for the PXI-1045 chassis.
Introduction
To minimize downtime caused by a power supply failure, the PXI-1045
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 i

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What You Need to Get Started To set up and use the NI PXI-1045 Power Supply Shuttle, you need the following items: ❑ PXI-1045 chassis (the unit being repaired) ❑ PXI-1045 power supply shuttle ❑ Read Me First: Safety and Radio-Frequency Interference ❑ NI PXI-1045 User Manual (provided with the chassis; also available atni.com/support) ❑ Number 1 Phillips screwdriver Description Refer to Figure 1 to locate user-accessible components on the power supply shuttle. 2 3 4 5 6 7 8 1 11 10 4 9 1 Circu

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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 PXI-1045 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.

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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 su

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Line regulation 3.3 V................................................ <±1% 5 V................................................... <±1% ±12 V .............................................. <±1% Efficiency ............................................... 70% minimum Power disconnect ................................... The AC power cable provides main power disconnect. Depressing the front-panel power switch controls the internal chassis power supply that provides DC power to the CompactPCI/PX

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Maximum ripple and noise (20 MHz bandwidth) Voltage Maximum Ripple and Noise +3.3 V 50 mV pp +12 V 120 mV pp +5 V 50 mV pp –12 V 120 mV pp Over-current protection ..........................All outputs protected from short circuit and overload with automatic recovery when the short or overload is removed. 1 Over-voltage protection 3.3 V ................................................140 to 150% above nominal output voltage 5 V, +12 V, –12 V ...........................120 to 130% above nomina

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National Instruments™, NI™, and ni.com™ are trademarks of National Instruments Corporation. Product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering National Instruments products, refer to the appropriate location: *323693A-01* Help»Patents in your software, the patents.txt file on your CD, or ni.com/patents. 323693A-01 Sep03 © 2003 National Instruments Corp. All rights reserved.