A5/A3™ Service Manual 046-001141-00 1 - 63
Theory of Operation Ventilator Control and Drive
FIGURE 1-52 Monitor Signal Detection Board, Bottom View
Monitor Signal Detection Board Communication Interface, J1
Ventilator Sensor Interface, J3
PIN NAME FUNCTION
1TXD Serial Port Transmit
2RXD Serial Port Receive
3 12V 12V Power Supply
4GND Ground
5GND Ground
6 12V 12V Power Supply
7 PRST Pressure Relief Valve Control Signal
85V 5V Power Supply
PIN NAME FUNCTION
1SDA I2C Data Signal
2 SCL I2C Clock Signal
3 VT Thermal Mass Flow Sensor Temperature Signal
4 VF Thermal Mass Flow Sensor Flow Signal
5 12V Sensor Power Supply
6GND Ground
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