GE Brivo OEC 715 - Page 102

Brivo OEC 715/785/865/865 Mobile C-Arm X-Ray Product Service Manual
2-48
Communication with MCB and Collimator
DAC7554 is used to output 3 analog channels and its control accuracy is 12-bit. It shall be controlled by MCB
through SPI, in order to generate collimator-motor- target-position control signal. There are 3 motors in
collimator, which are IRIS motor, shutter width motor and shutter rotation motor. Therefore, DAC in CCB shall
support 3 independent channels. Meanwhile, CCB transmits 3 motors’ position feedback (analog signal) to MCB
directly. Through the PID adjustment, the motor driver can control the motor properly.
Interface
Signal Name
Description
Scale
Direction
Connector. Pin
SPI_DIN_CCB
One termination of Emergency
switch1/input
0/+15V Digital
input
J1.a11
SPI_SCLK_CCB
The other termination of
Emergency switch1/input
0/+15V Digital
input
J1.a12
SPI_SYNC_CCB
One termination of Emergency
switch2/input
0/+15V Digital
input
J1.a10
RSV_CCB
Connected to MCB for
reserve/input
0/+15V Digital
input
J1.b12
INTERLOCK_COM
System inter lock
0/+15V Digital
input
J1.a13
INTERLOCK_COM
System inter lock
0/+15V Digital
output
J1.b14
IRIS_POS_F
Transmit IRIS motor position
analog feedback to MCB/output
0~5V analog
output
J1.b13
SHUT_ROT_POS_F
Transmit shutter rotation motor
position analog feedback to
MCB/output
0~5V analog
output
J1.b10
SHUT_WIDTH_POS_F
Transmit shutter width motor
position analog feedback to
MCB/output
0~5V analog
output
J1.b11
GND_15V
+15V Ground
n/a
n/a
J1.c9,
GND_15NV
-15V Ground
n/a
n/a
J1.a9, J1.b9
GND_5V
+5V Ground
n/a
n/a
J1.a4, J1.b4
J1.c4
+15V
+15V power supply/input
n/a
Input
J1.c15, J1.c16
-15V
+15V power supply/input
n/a
input
J1.a15, J1.a16
+5V
+5 V power supply/input
n/a
input
J1.a5, J1.b5, J1.c5
SHUT_WIDTH_MOT+
Shutter width motor +/output
output
J1.c2
SHUT_WIDTH_MOT-
Shutter width motor -/output
output
J1.c3
SHUT_ROT_MOT+
Shutter rotation motor +/output
output
J1.b2
SHUT_ROT_MOT-
Shutter rotation motor -/output
output
J1.b3
IRIS_MOT+
IRIS motor +/output
output
J1.a2
IRIS_MOT-
IRIS motor -/output
output
J1.a3
SHUT_WIDTH_POS
Shutter width position
feedback/input
0~5V analog
input
J1.c12
SHUT_ROT_POS
Shutter rotation position
feedback/input
0~5V analog
input
J1.c11
IRIS_POS
IRIS position feedback/input
0~5V analog
input
J1.c10
COL_POTS_REF+
CollimAtor potentiometer
reference +
+5V±1%/5mA
power
output
J1.b1
COL_POTS_REF-
CollimAtor potentiometer
reference -
Analog ground
n/a
J1.a1