54 Basic functions
MOBILETT XP SPR8-230.840.01.05.02 Siemens AG
11.05 CS SD 24
Page 54 of 72
Medical Solutions
7-
6Basic functions
Switch-on mode 0
The line voltage must be in the range of 110 V (+/-10%) or 230 V (+/-10%).
The line voltage is conducted via line filter Z1 to D927.
Board D927 distributes the required voltage via board fuses F7/F8 and control relay K22
to the system.
Power supply U2 is fed constantly when there is line voltage applied.
The system control unit (CPU) D916 and logical control unit D927 are supplied by power
supplies U1 and U2 when system switch SW1 (key switch) is activated.
System initialization begins:
SW1 = ON
The following functions are integrated on board D927:
- Power distribution, (fuses F7 and F8)
- Switch-on circuit (fuse F3)
- Voltage supply to the capacitor charger (fuse F6)
- Supply for the intermediate circuit for anode start, filament circuit, and high-voltage
(fuse F5)
- Collimator light
All functions are controlled and monitored by D916 (CPU).
For XP Digital, voltage supplies U3/U4 are switched on to supply 220 V AC to the CXDI
PC, power box, and touchscreen.
The main system functions are activated during initialization of D916 (CPU). The main
functions are:
- Charging of the capacitors
- Preparation of the filament circuit
- Preparation of the high-voltage circuit
After conclusion of initialization, the system shows the preferred values for kV and mAs
and is ready for operation.
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