Codan Cascade Operation Manual page 29

Auxiliary Voltages
For the digital section of the 48V board, three different voltage levels are required:
• 5.6V (U15)
• 5V (U9)
• 3.3V (U16)
The voltage converters receive an input from the DIG_Vcircuit powered by either the auxiliary 48V
coming out of U2, U5 or the 13.8V.
Microcontroller (U10)
The power supply's logic is only used to report its state, including: voltages, currents and temperature
to the other components of the CASCADE. The microcontroller receives input from different sections
of the PSU and can activate LED lights in the front of the unit and transmit this information via the
FIB.
Alarms and Status
Five LED lights on the front of the enclosure provide the basic information about the power supply
status. These LEDs include:
• Power Light (PWR)
• Alarm Light (ALM)
• 48V Left Status (48V LEFT)
• 48V Right Status (48V RIGHT)
• 13.8V Status (13.8V OUT)
Two signals: IOG_48V_LEFT and IOG_48V_RIGHT are also used to monitor the status of each
DC-DC Converter brick.
Operation
To operate the power supply, an output enable button located in the back of the enclosure turns the
device's output ON (see Figure 10).
FIGURE 10: Output Enable Button Location
Cascade Power Supply
Cascade System Modules Operation Guide
OG-CASC-SYS-MOD-1-0-0P
29