Multiplexer Board Interface; Digital Input Signals; Digital Output Signals - Bayer HealthCare RapidPoint 400 Series Service Manual

Multiplexer Board Interface

Digital Input Signals

Input Signal
PREMUX_SIG_HI
PREMUX_SIG_LO
THM_BLK_HI
THM_BLK_LO
THM_PRE_HI
THM_PRE_LO
HCT1_SIG
HCT2_SIG

Digital Output Signals

Output Signal
PREMUX0..7
GAIN0..5
ID_SDA
ID_SCK
98
Description
Multiplexed sensor signal, offset adjusted and properly
amplified output of the Multiplexer board.
Signal low sense return for PREMUX_SIG.
Connected to the reference side of the bridge. Typical
voltage is +595.9 mV.
High terminal of the block thermistor.
Connected to the reference side of the bridge. Typical
voltage is +595.9 mV.
High terminal of the preheater thermistor.
Output of the first hematocrit circuit. This signal originates on
the Contact board and passes through the Multiplexer board
on its way to the DAS circuitry.
Output of the second hematocrit circuit. This signal
originates on the Contact board and passes through the
Multiplexer board on its way to the DAS circuitry.
Description
8-bit latched bus.
6-bit latched bus.
Serial data line to the EEPROM located in the sensor
module. It is a bi-directional signal.
Serial clock line to the EEPROM.
Rev. C