schroff VME64x, User Manual, Page: 13 / 22

VME64x System Subrack 2 U Product Definition
20836-245
www.schroff.biz 9 R1.0, July 14, 2009
2.5 Cooling
Figure 5: Fan Tray
The boards and the power supply are cooled by forced air convection through
two 80 mm 12 VDC axial fans (69 m³/h (40 cfm) each).
The fans and a Fan Monitor Module (FMM) are located on a hot-pluggable Fan
Tray.
The fan speed is monitored by the Fan Monitor Module (FMM). When the fan
speed drops 20% below nominal fan speed, the FMM will signal a fault condition
with the red Fan Fail LED.
Figure 6: Airflow
10009831
1 Power LED 2 Fan Fail LED
Caution!
To maintain proper airflow, all open slots must be covered with filler panels.
The filler panel should include an airflow baffle that extends to backplane.
10009830