beautypg.com

3 thermal control – Compaq COM Express Extension User Manual

Page 18

background image

5 Hardware extensions

Copyright © COM Express™ Extension

Specification Rev 013

18

5.3

Thermal Control

A three-pin fan header is stuffed onboard the module to support thermal control through the use of a

fan. Through BIOS-settings, it is possible to control the fan depending on the Active Trip Point

temperature. The fan switches on/off depending on the adjusted Active Trip Point temperature. In

order for this feature to function properly, an ACPI compliant OS is necessary. (Except for

nanoETXexpress modules)

- Part number (Molex):

53261-0390

- Mates with:

51021-0300

- Crimp terminals:

50079-8100

Electrical characteristics:

- Vcc = 5 V

- Imax (continuous) = 0,68 A

- Imax (pulsed) = 2 A

- Sense (Tacho-pulse) = 4 Pulses per turn