User manual

8321 User Manual •
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• (V 1.1) Page 15
Improving Performance
To improve performance and reliability, the PS-8300 has an on-board fan. Under high load conditions
(>40 Watt), the optional CFM-8321 Cooling Fan Module must be added for increased ventilation.
Ventilation and Cooling
This frame has been specially engineered to minimize internal heat buildup and thus improve card
reliability. However, for long-term reliability and increased product life of the frame (without the
Cooling Fan Module installed), it is recommended that the total power dissipation of all cards installed
in the frame should not exceed 40 Watt, and to leave an empty 1RU panel space above and below the
frame for improved heat dissipation. For information on the power dissipation of cards, please refer to
specific card information in the Product Catalog or visit our website.
For applications using less than 40 Watt in a non-ventilated frame, but where the individual card power
consumption is greater than 8 Watt, the cards should be evenly distributed in the frame. This will
prevent the creation of concentrated heat, or unbalanced heat-rise areas, in the frame.
For applications that require greater heat dissipation, or where the card power consumption is greater
than 40 Watt, it is necessary to use the 8321-C frame (with Cooling Fan Module installed), or to install
the CFM-8321 Cooling Fan Module field upgrade option. When the Cooling Fan Module is installed,
the frame and PS-8300 can supply up to 120 Watt of card power. Under these ventilated conditions,
there is no requirement for extra spacing between the frames. The 8321-C (or 8321 with CFM-8321
option) can be stacked one on top of the other, a feature that is highly desirable in densely crowded
rack frame environments.
Notice
For reliable performance, it is recommended that the frame door
not be opened for longer than 5 minutes when using the Cooling
Fan Module option on frames loaded with more than 40 Watt.
Figure 1. Cooling Fan Module Frame Stacking Options
E
mpty Space
E
mpty Space
8321-C
Max. 120W Module Power
8321-C
Max. 120W Module Power
8321-C
Max. 120W Module Power
8321
Max. 40 Watt
Without Fan Kit: Fan Kit Installed: