National Instruments PXI 1000B Installation manual

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322512B-01 ©Copyright 1999 National Instruments Corp. All rights reserved. July 1999
NOTE TO USERS
ADDITIONAL INFORMATION ABOUT YOUR
PXI -1000B
The following information was compiled after publication of the
PXI-1000B User Manual. Please read this note carefully and refer to it in
conjunction with your PXI-1000B User Manual.
Replacing the Power Supply Fuse (AC-Only Chassis)
The PXI-1000B AC-only chassis has a fuse inside the power supply
module for additional protection beyond the external AC mains circuit
breaker. Complete the following steps to replace the 250 V, 12 A NB
(normal blow) fuse, as shown in Figure 1:
1. Turn the power switch to the Standby position.
2. Disconnect the AC line cord.
3. Loosen the six captive screws in the back of the chassis, as shown in
Figure 2.
4. Grasp the handles of the power supply module and remove it from the
back of the chassis.
5. Replace the fuse.
6. Reinstall the power supply module in the chassis.
7. Tighten the six captive screws.
8. Reconnect the AC line cord.
™

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Figure 1. Power Supply Module
Fuse

©National Instruments Corporation 3 Additional Information about Your PXI-1000B
Figure 2. Captive Screws Holding the Power Supply Module
AC Power Cord Compliance
AC mains supply cords used with the PXI-1000B must meet the
requirements of ANSI/UL817 for use in the United States, CSA C22.2 21
and 49 for use in Canada, and IEC 227 or 245 for use in the European
Union. AC mains power supply cords used with the PXI-1000B in other
countries must be approved by the authority having jurisdiction in that
country.
Captive Screws
Captive Screws

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Replacing the Fuse for Optional Battery Pack
(DC-Capable Chassis Only)
The optional battery pack for the DC-capable PXI-1000B has a 10 A inline
automotive-type fuse. Complete the following steps to replace the fuse, as
shown in Figure 3:
1. Turn the power switch to the Standby position.
2. Disconnect the AC line cord and DC power cable.
3. Loosen the six captive screws in the back of the chassis, as shown in
Figure 2.
4. Grasp the handles of the power supply module and remove it from the
back of the chassis.
5. Replace the battery pack fuse.
6. Reinstall the power supply module in the chassis.
7. Tighten the six captive screws.
8. Reconnect the AC line cord and DC power cable, if previously
connected.
Figure 3. Optional Battery Pack
Fuse Fuse Holder
Battery Pack

©National Instruments Corporation 5 Additional Information about Your PXI-1000B
DC Connector (DC-Capable Chassis Only)
Figure 4 shows the DC connector (P1) on the rear panel of the DC-capable
PXI-1000B.
If you want to build a custom DC cable, be sure to note the positive (+) and
negative (–) terminals shown in Figure 4. Use the following components or
their equivalents to mate to the P1 port:
• Positronic connector, part number CBD7W2F20000
• Norcomp hood, part number 972-015-010-011
• Two Positronic contacts, part number FS4008D
Install a 20 A inline fuse on the positive (+) wire of the custom cable.
Note You can purchase an optional DC cable from National Instruments that incorporates
an inline fuse and the mating connector for the P1 port.
Figure 4 details the P1 connector on the chassis, not the cable.
Figure 4. DC Connector on Rear of DC-Capable PXI-1000B Chassis
Positive
(+) Negative (–)
P1