User's Manual Part 3

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Component layout SCH0231AR1
SCH0231AR1 DESCRIPTION
The power supply accepts a nominal continuous input voltage of 28V and supplies three continuous current
output with voltages of +5V, +15V and -15V. It also provides a voltage of +28V to the system bus. The
power supply voltages towards the system bus are switched by means of relays controlled by the micro-
processor of the control board.
There are switching regulators for the +5V, +15V and -15V voltages.
The power supply board provides the operating voltages to the control board trough multi-wire flat cable. In
this there are also analog voltages to monitor the power supply status. The monitoring of the +5V, +15V and
-15V voltages are conditioned to about 4V nominal.
The board provides the power supply to the system fan. Its on/off status and its speed can be set by the
micro-processor of the control board.
The connections to the system bus and power supply board are made using a fast-lock connector.