Technical data

Chassis Cooling
6-9
6
Dual 9-, 12-, and 20-slot Chassis
The VME card cage is cooled by a front plug-in fan module
providing front to rear airflow. Dual fan modules are available for
the dual 9-slot configuration. The individual fan modules are
replaceable without interrupting power to the companion system.
The system is designed for an input air temperature below 50° C
(122° F). Three DC-powered fans (four fans in the dual 9-slot
chassis) provide forced-air cooling for the VMEmodules and mass
storage drives in the VME card cage. Power supply modules have
a separate set of fans; convection cooling is used for the rear-
mounted transition modules. For the VME card cage, the direction
of airflow is in at the front of the fan tray, up past the VMEmodules
and mass storage drives, and out the upper back of the chassis. For
the power supplies, cooling air is drawn in the front of each module
and vented out through the lower back panel of the chassis.