National Instruments NI PXI-1042 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.

What You Need to Get Started

❑ NI PXI-1042 Series chassis (the unit being repaired)

❑ NI PXI-1042 Series power supply shuttle

❑ Read Me First: Safety and Radio-Frequency Interference

❑ NI PXI-1042 User Manual (provided with the chassis; also available at

ni.com/support)

❑ #1 Phillips screwdriver

Description

Refer to Figure 1 to locate user-accessible components on the power supply shuttle.

1 2 3 4 5 6 7 8

10 9

1 Circuit Breaker 2 Universal AC Inlet 3 Chassis Grounding Screw 4 Fan Speed Selector Switch 5 PXI_CLK10 OUT BNC

NI PXI-1042 Series Power Supply Shuttle User Guide 2 ni.com

6 Remote Inhibit and Voltage Monitoring Connector 7 PXI_CLK10 IN BNC 8 Filter Cover 9 Filter Retainer Screw 10 Mounting Screws (8X)

Figure 1. NI PXI-1042 Series Power Supply Shuttle Rear Panel

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

support

ni.com/

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.

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