Hologic DISCOVERY A, Technical Manual

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Discovery QDR Series Technical Manual
2-16
Figure 2-7.
C-Arm Interface Board High Level Interconnection Diagram
2.8 X-Ray Controller Assembly (P/N 010-1273)
This assembly provides pulsed power to the primary winding of the high voltage
transformer in the X-Ray Source Unit and AC power to the primary winding of the
filament transformer. It consists of a single printed circuit board and several large
components contained in a chassis mounted at the front of the lower C-arm, just in front of
the Tank Assembly. The XRC receives split 240VAC power from the DIN Rail Power
Distribution Module. It also receives command and timing data from the C-Arm
Controller Board and it provides a line frequency timing signal and housekeeping and
diagnostic data to the C-Arm Interface Board.
2.8.1 Interface
Figure 2-8 shows the interface connections between the C-Arm Interface Board and the X-
Ray Controller Assembly. Table 2-11 describes the interface signals and identifies the
connectors and their pin assignments. Note that the AC input power comes directly from
the DIN Rail Power Module and connects to the X-Ray Controller Assembly.
C-ARM
INTERFACE
X_RAY
SOURCE
UNIT
X-RAY
CONTROLLER
APERTURE
MOTOR AND
SENSOR
LASER
ASSEMBLY
DRUM
MOTOR AND
ENCODER PICKUP
TO/FROM
DISTRIBUTION
ANALOG TO
DIGITAL
CONVERTER
INTEGRATOR
MULTIPLEXOR
SILICON
DETECTORS
Data Acquisition System