A7â„¢ Service Manual 046-006272-00 1 - 77
Theory of Operation Ventilator Control and Drive
FIGURE 1-78 Sensor Interface Board, Bottom View
Sensor Interface Board Interface, J2
Test Point Definition
1.7.3 Battery
1.7.3.1 Battery Power
For A7 anesthesia system:
Battery: 11.1V, 4.5Ah×2 Lithium-ion Battery (sealed)
Battery Run Time: 90 minutes (new battery)
Battery Charge Time: 8 hours max from an initial charge of 10%.
PIN NAME FUNCTION
1 MON_BRD_SDA VCM I2C Data Signal
2 MON_BRD_SCL VCM I2C Clock Signal
3 VT Thermal Mass Flow Sensor Temperature Signal
4 VF Thermal Mass Flow Sensor Flow Signal
5 12V 12V Power Supply
6GND Ground
PIN NAME FUNCTION
TP1 3V3 Test 3.3V Power Supply
TP2 5V Test 5V Power Supply
TP3 5VA Test Analog 5V Power Supply
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