Frame functional description
1-21
Document no. 2044677-001
as well. This results that the charger reduces its output current if the sum of the charger input
current and MOD currents exceeds the input limit. The purpose of this is to prevent the input
power sources from getting overloaded if MOD power is increased during charging.
Power path switching electronics
The power source to be used (batteries, external DC or AC/DC output) is chosen initially by a
‘power path controller’ inside this block. The PMC CPU has full control over the power path
management after the initial choice is made at startup.
3.1.5 AC/DC unit
Figure 9 AC/DC unit
AD/DC unit
The AC/DC unit is a compact medical power supply based on high-efficiency technology. It is
designed for 65 watt continuous output power, universal AC input and 15.9V output voltage.
Because FM is convection cooled, AC/DC unit’s output is not loaded with full rated power to
reduce heat dissipation.
3.1.6 Interconnection board
Figure 10 Interconnection and User interface flex board
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