Kontron KTQ77-FLEX Manuel d'utilisateur télécharger pdf (Page 37)

KTQ77/Flex Users Guide

KTD-N0848-C Page 37

6.2 Fan Connectors (FAN_CPU) (J28) and (FAN_SYS) (J29)

The FAN_CPU is used for the connection of the FAN for the CPU.

The FAN_SYS can be used to power, control and monitor a fan for chassis ventilation etc.

The 4pin header is recommended to be used for driving 4-wire type Fan in order to implement FAN

speed control. 3-wire Fan is also possible, but no fan speed control is integrated.

4-pin Mode:

PIN Signal Type Ioh/Iol

Pull

U/D

Note

CONTROL

SENSE

4K7

+12V

PWR

GND

PWR

Signal Description

CONTROL PWM signal for FAN speed control

SENSE Tacho signal from the fan for supervision. The signals shall be generated by an open

collector transistor or similar. On-board is a pull-up resistor 4K7 to +12V. The signal has to

be pulsed, typically twice per rotation.

12V +12V supply for fan. A maximum of 2000mA can be supplied from this pin.

GND Power Supply GND signal

3-pin Mode:

PIN Signal Type Ioh/Iol

Pull

U/D

Note

SENSE

4K7

+12V

PWR

GND

PWR

Signal Description

SENSE Tacho signal from the fan for supervision. The signals shall be generated by an open

collector transistor or similar. On-board is a pull-up resistor 4K7 to +12V. The signal has to

be pulsed, typically twice per rotation.

12V +12V supply for fan. A maximum of 2000mA can be supplied from this pin.

GND Power Supply GND signal

Internal Connectors

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 140 141

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Kontron KTQ77-FLEX Manuel d'utilisateur Page 37

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