Cooling Requirements

In the Enterprise 3500 system, all boards must be adjacent to a PCM. The fans in the PCM cool the boards. The minimum configuration is one PCM for every two adjacent boards.

The PCMs incorporate redundant bulk fan power so that the fans continue to operate in a failed power supply via the redundant fan power from the peripheral power supply.

A PCM or an auxiliary fan tray must be working in PCM slot 5. The fans cool the peripheral power supply/AC input.