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PC Hardware in a Nutshell, 3rd Edition
book

PC Hardware in a Nutshell, 3rd Edition

by Robert Bruce Thompson, Barbara Fritchman Thompson
July 2003
Beginner to intermediate content levelBeginner to intermediate
874 pages
38h 13m
English
O'Reilly Media, Inc.
Content preview from PC Hardware in a Nutshell, 3rd Edition

NLX Power Connectors

The NLX Main Power Supply Connector uses the same pinouts, wire colors, and physical connectors as the ATX Main Power Supply Connector shown in Table 26-12. The NLX specification also defines the NLX Optional Power Supply Connector, shown in Table 26-16. This connector uses the same physical connectors and 22 AWG wire as the ATX Optional Power Supply Connector described in the preceding section, but uses different wire colors and a slightly different pinout. Wire colors are standard.

Table 26-16. NLX Optional Power Supply Connector

Pin

Color

Signal

Pin

Color

Signal

1

white

FanM

4

NC

Reserved

2

blue

FanC

5

grey

1394

3

brown

Sense

6

NC

Reserved

Pin 5 (1394) on this connector is analogous to Pin 5 (1394V) on the ATX connector, and also supplies voltage to unpowered 1394 devices. However, instead of using Pin 4 as a ground return path for 1394 voltage, this connector leaves Pin 4 unconnected. It appears unwise to share the main system ground return path with the ground return path for unregulated 1394 voltage from Pin 5, particularly with Pin 4 sitting there so obviously unused. If you understand the reason for this difference, please let us know.

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Publisher Resources

ISBN: 059600513XErrata Page