A7™ Service Manual 046-006272-00 1 - 81
Theory of Operation Electrical Flow Control System
Anesthesia Signal Interface Board Interface, P1
1.7.6 Breathing System Heater
The anesthesia system heater provides software and hardware dual-protection from overheating. The
heater can switch over its operating mode automatically according to the change in ambient
temperature.
1.8 Electrical Flow Control System
1.8.1 EFCS Monitoring Board
FIGURE 1-85 EFCS Monitoring Board, Top View
PIN NAME FUNCTION
1 RXD_AG_TTL AG Module Receive Signal
2 TXD_AG_TTL AG Module Transmit Signal
3GND Ground
4 VPP 12V Power Supply
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