IEI Integration NOVA-HM551 v1.10 - Manual (Page 75)

NOVA-HM551 5.25" SBC
Page 61
This jumper selects the voltage supplied to the PCI-104 expansion module.
Setting Description
Short 1-2 +5.0 V (Default)
Short 2-3 +3.3 V
Table 4-8: PCI-104 Voltage Jumper Settings
Figure 4-12: PCI-104 Voltage Jumper Location
4.6 Chassis Installation
4.6.1 Airflow
WARNING:
Airflow is critical to the cooling of the CPU and other onboard
components. The chassis in which the NOVA-HM551 must have air
vents to allow cool air to move into the system and hot air to move out.
The NOVA-HM551 must be installed in a chassis with ventilation holes on the sides
allowing airflow to travel through the heat sink surface. In a system with an individual
power supply unit, the cooling fan of a power supply can also help generate airflow
through the board surface.