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B-9
Fan Power Connectors: Fan1 to Fan5
The NI RMC-8354 has five fan headers (Fan1 to Fan5). These fans are 4-pin fan headers.
However, pins 1 to 3 of the fan headers are backward compatible with the traditional 3-pin fans.
A fan speed control setting in the BIOS allows the BIOS to set fan speeds automatically based
on the system temperature. The default setting is disabled, which allows the onboard fans to run
at full speed.
Note
Use all 3-pin fans or all 4-pin fans on a motherboard. Do not use 3-pin fans
and 4-pin fans on the same board.
Figure B-13.
Fan Power Connectors (Fan1 to Fan6)
Table B-3.
Fan Power Connector Signals
Pin
Signal Description
1
GND
2
2.5 A/+16 V (red)
3
Tachometer
4
PWM_Control
4
1