IEI Integration NOVA-HM551 v1.00 - Manual (Page 34)

NOVA-HM551 5.25" SBC
Page 20
Figure 3-4: Digital I/O Connector Locations
Pin Description Pin Description
1 GND 2 +5V
3 Output 3 4 Output 2
5 Output 1 6 Output 0
7 Input 3 8 Input 2
9 Input 1 10 Input 0
Table 3-5: Digital I/O Connector Pinouts
3.2.4 Fan Connector (CPU)
CN Label: CPU_FAN1
CN Type: 4-pin wafer (1x4)
CN Location: See Figure 3-5
CN Pinouts: See Table 3-6
The fan connector attaches to a CPU cooling fan.