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6.2.1
Fan Control
The congatec Board Controller on the conga-PA3 controls the power supplied to the fan with the PWM signal. Additionally, there is an input
signal called FAN_TACHOIN that provides the ability to monitor the system’s fan RPMs (revolutions per minute). This signal must receive two
pulses per revolution in order to produce an accurate reading. For this reason, a two pulse per revolution fan is recommended.
6.2.2
Power Loss Control
The cBC controls the power-up of the SBC and can be used to specify how the system behaves after an AC power loss occurs. Supported
modes are “Turn On”, “Remain Off” and “Last State”.
6.2.3
Board Information
The cBC provides a rich data-set of manufacturing and board information such as serial number, EAN number, hardware and firmware revisions,
and so on. It also keeps track of dynamically changing data like runtime meter and boot counter.
6.2.4
CPU Fan Connector
The conga-PA3 supports the connection of 12V cooling fans. The signals of the CPU fan are routed to connector X49. The pinout is described
below:
Table 31 CPU Fan Connector (X49) Pinout Description
Pin
Signal
1
GND
2
+12VDC
3
FAN_TACHOIN
Connector Type
X49: 2.54 mm, 3 pin fan connector
Note
The recommended maximum power of the system fan is approximately 3 W.
CPU Fan
(X49)
1
2
3