4535 612 10261 HD11 Service Manual Page 65
CSIP Level 1 Theory of Operation: Functional Description
• Fault Protection: The AC outputs are fault-protected from an overload condition (including
turn-on surges). The AC input may be cycled to restore power.
• A fan interlock exists that must be completed to enable the power supply to generate any
DC or AC output voltage.
• Overcurrent Protection: All outputs have overcurrent protection to protect damage to the
power supply from overcurrent load or short circuit conditions. Latched AC outputs will be
reset once the input power is cycled. A DC overcurrent condition must be present for
more than 2 ms before it will trip the overcurrent latch. The latched DC output will be reset
once the power supply enters the sleep mode or if the input power is cycled.
• Indicators: The power supply has green LED indicators that illuminate when their power
function is active. There is one LED for indicating that AC mains power is present and an
LED indicating each non-fan DC output that has not shut down due to a fault. Except for the
AC OK LED, another of which is on the back of the supply above the power inlet, these
indicators are located on the top rear of the power supply and are only visible if the right sys-
tem side cover is removed:
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