Engine
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Engine Rear View
The following figure shows the rear of the engine in a configuration that contains the following:
•
Three power supplies (with fans)
•
Integrated Switch blade (ISS)
•
Integrated Expansion Switch blade (IXS)
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In a basic configuration containing two engines, each of the engines contains two ISS modules.
The IXS module is used with an ISS module in an engine only when the configuration goes
beyond two engines.
Power Supplies
The power supplies are powered on when the power cord is plugged in; they do not have power
switches. The power supplies not only provide power, but they also contain fans that cool the
system. The system only needs two of three power supplies to supply the needed power to
function properly. You can remove and replace a power supply temporarily while the system is
running if one fails.
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You should leave the failing power supply in place until you replace the failing power
supply. Replace the power supply as soon as possible to maintain the proper airflow. Do not
remove the failing supply until immediately before you replace it.
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Only trained Avid technicians should remove and replace the power supply while the
system is running. Since power to the system is still applied internally to the midplane you
must always keep your hands external to the engine when a power supply is missing from
the engine.
Power
supplies
IXS module
ISS module
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4
5
6
7
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4
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