2-26 
 
2.1.6 Control System 
2.1.6.1 Main Control Board 
Main control board is the main control component of human-machine interaction in anesthesia 
machine. It drives the displays (including external display with VGA port) and speaker, and 
exchanges data with monitoring module, flowmeter control board, key control board, and infrared 
communication board through series ports. 
 
 
Definition of main control board J3 
Pin No.  Signal Name  Discription 
1)  
GND Ground 
2)  
GND Ground