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Introduction
Power and Cooling Module (PCM)
SN0051103-00 A 1-3
A
Power and Cooling Module (PCM)
Each iSR6250 chassis blade has a power and cooling module (PCM), located on
the back-side of the chassis. Each PCM consists of one power supply, three fans,
and one external status LED.
Figure 1-3 Power and Cooling Module (PCM)
Figure 1-4 PCM — Back Plate
Each blade is capable of simultaneously driving all six fans in both PCMs.
Normally, only one blade controls both fans, running them at a normal speed.
However, if the system detects higher than expected temperature on either side of
the blade, it forces the fans to run at full speed. Once the temperature is back to
normal, the fans resume running at their normal speed.
Mid-plane Power Connector Fans & Temperature Sensors
Connector to Power Supply
PCM Status Indicator
Fan Exhaust Grill
Power Connector