SHB_U14 Chapter 3: Module components 3-23
Sensor-CPU circuit board
Location in module
The Sensor-CPU circuit board is beside the analyzer module and is inserted in the
IR module circuit board.
Structure
For signal transfer purposes the Sensor-CPU circuit board is connected to the
Sensor-CPU circuit board by means of 3 terminal strips.
There are also five plug connection for central and peripheral functions.
Function
The circuit board contains the following functions:
• Processor for module signal processing and control
• A/D converter variables
• Multiplexer variables
• Internal sample preparation control
• Oxygen sensor signal processing
• 15V, 24V power supply
• Reset generation
• Internal bus controller
Figure 3-23
Sensor-CPU board
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