Contact Pc Board; Digital Signals; Digital Input Signals; Digital Output Signals - Bayer HealthCare RapidPoint 400 Series Service Manual

Contact PC Board

The Contact PC board amplifies signals from the electrodes before they
are processed by the rest of the system. The Contact board provides the
following:
• low bias, current-transimpedence output amplifiers and bias amplifiers
for four amperometric sensors
• high-impedance differential amplifier for seven potentiometric sensors
• AC current, source and synchronous, differential amplifier for two
hematocrit/fluid detector sensors
• connections for three thermistors organized in a thermal-control loop
that regulate the sample temperature to +37°C
• connections to an EEPROM device located within the sensor module
for storing calibration and configuration information specific to the
measurement cartridge

Digital Signals

Digital Input Signals

Input Signal
ID_SDA
ID_SCK
ASAMP
BSAMP
DRIVE

Digital Output Signals

Output Signal
ID_SDA
Rev. C
Description
Serial data line to the EEPROM located in the sensor module.
This signal is bi-directional.
Serial clock line to the EEPROM.
Control signal for the charge transfer process in the
hematocrit circuits.
Control signal for the charge transfer process in the
hematocrit circuits. The BSAMP signal is out of phase with
the ASAMP signal.
This signal provides the AC excitation voltage for the
hematocrit sensors.
Description
Serial data line to the EEPROM located in the sensor module.
This signal is bi-directional.
Electronic System Overview 69