Siemens AG SPB7-250.844.01 Page 7 of 10 MAMMOMAT
Novation
DR
Medical Solutions Rev. 03 08.04 CS SD 24 Wiring Diagrams
X041E 4-7
D750 MASTER BOARD:
LIST OF SWITCHES, TEST POINTS
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Test point Page Description
GEN_POWERED_ON 6-1 Signal to the PXCM unit (Brick unit), that the power to the
Mammomat system has been switched on by the operator.
PREP_DR_DET_ 6-1 Signal to the PXCM unit (Brick unit).
The positive
edge indicates to the Brick that the generator preparation
phase for making an exposure has started and requests that the DR detec-
tor shall prepare for image acquisition.
The negative
edge of the signal comes 5 ms after the negative edge of the
signal GEN_RDY_FOR_DR_EXP at normal exposure termination, in case
the hardware detects an error the negative edge of the signals will coincide.
If a tube arc occur the signal will not go inactive.
GEN_RDY_FOR_DR_EXP 6-1 Signal to the PXCM unit (Brick unit).
The generator preparation phase has finished and the generator is ready for
generating high voltage to the tube (i.e. x-ray).
The inactivation of the signal will coincide with negative edge of the signal
X_RAY_ON at normal termination of the exposure. In case of an abnormal
termination of the exposure, the inactivation of the signal coincides with the
inactivation of the signal PREP_DR_DET.
If a tube arc occur the signal will not go inactive.
X_RAY_ON 6-1 Signal to the PXCM unit (Brick unit). The exposure is in progress.
Note: The signal stays active
- at the grid turning points when x-ray actually is off.
- at the first two tube arcs when x-ray actually is off.
DR_DET_RDY_FOR_EXP 6-1 The DR detector is making image data acquisition.
DR_SYST_RDY 6-1 The DROC of the DR system indicates that it is ready for an
exposure.
DR_DET_ERR_ 6-1 The DR system indicates to the generator that it has detected an error.
HV_SET 6-1 Analog output signal to the generator for setting the magnitude of the tube
voltage (high voltage).
The relation between the tube voltage and the analog control signal is 5kV/V.
HV_ACT 6-1 Analog input signal HV_ACT, from the generator, that is proportional to the
true tube voltage.
The relation between the tube voltage and the analog signal is 5kV/V.
MA_SET 6-1 Analog output signal to the generator for setting the magnitude of the tube
current.
The relation between the tube current and the analog control signal is
40mA/V.
MA_ACT 6-1 Analog input signal MA_ACT, from the generator, that is proportional to the
true tube current.
The relation between the tube current and the analog signal is 40mA/V.
FIL_CURR_SET 6-1 Analog output signal to the generator for setting the magnitude of the fila-
ment current.
The relation between the filament current and the analog control signal is
1A/V.
FIL_CURR_ACT 6-1 Analog input signal FIL_CURR_ACT, from the generator, that is proportional
to the true filament current.
The relation between the filament current and the analog signal is 1A/V.
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