Mindray BS-120 - Pre-Amp Board; AD Conversion Board

6 Hardware 6-7
Figure 6-4 Function of the Drive Board
6 steper motor
name as
59D1300
5 steper motor
name as
42D2120
Motor of reaction disk
Motor of sample/reagent
Motor of mixing bar
Motor of sample probe
vertical movement
Motor of sample probe
horizontal movement
Motor of sample syring
Motor of filter wheel
Motor of auto washing
header vertical movement
Drive of pump
Outside washing pump for
sample probe
Inside washing pump for
sample probe
Inside washing vlave for
sample probe
4 valve for reserved
Others drive
Switch of light
reaction disk heating
reagent preheating
Signal input Power inputMain Board Power supply
Drive Board
Logic
2 Motor of auto washing
syring
Motor of mixing bar
horizontal movement
Drive of DC
motor
Mixing DC motor
6.6.4 Pre-amp Board
The Pre-amp circuit board can converse the light signals into electrical analog signals by
the photoelectric diode. The photoelectric diode converses the light signal into the current
signal in different wavelengths and the Pre-amplifier turns the current signal to the voltage
signal and transmit this signal to the AD conversion board.
6.6.5 AD Conversion Board
This unit can process the analog signals from the pre-amp board and convert the analog
signals into the digital signals. The photoelectric diode converts the monochromatic light
signal into the voltage signal and the signal arrives the AD input. The AD conversion board
filters and amplifies it; at the same time, the AD collects the signals indicated by the signal
from the main board and then sends the AD value to the main board for further process.
The AD conversion board also provides power to the Pre-amp board.
Figure 6-5 shows the function framework of the AD conversion board.
Figure 6-5 AD Conversion Board