9
AD103C
AMPLIFIER BOARD ELECTRICAL CONFIGURATION
5
AMPLIFIER BOARD ELECTRICAL CONFIGURATION
The digital transducer electronics circuit basically comprises the following function
groups:
S
Amplifier
S
Analog/digital converter (A/D)
S
Evaluation unit (μP)
S
Power failsafe parameter storage (EEPROM)
S
RS232 serial interface
S
Digital inputs/outputs (HCMOS)
S
Power supply
S
Hardware switch for write protection of LFT parameters
S
Bus connection for DeviceNet, CANOpen and diagnostic functions
CAUTION
The analog part is supplied with power via the external 5 V
DC
power supply, which is simul
taneously used as the bridge excitation voltage.
The supply voltage range of 5 V
DC
+
5 % must not be exceeded.
The AED's external supply voltage must have low residual ripple (< 10 mV), as this supply
voltage must simultaneously be used as the bridge excitation voltage.
