2-4 
 
2.3 Main Unit 
The patient monitor consists of: 
  Input system: button board, knob, touchscreen, power switch and LED board 
  Output system: LCD panel, alarm LED board, recorder and speaker 
  Processing and communications system: main board and integral module rack assembly.     
  Power management system: battery, battery interface board and power module   
  Equipment interface system: USB_Hub interface board, DVI interface board CF card 
assembly and internal wireless network card. 
 
Additionally, the patient monitor can also connect satellite module rack (SMR), parameter 
modules, BeneLink module, mouse, keyboard, etc. 
 
The following diagram illustrates the structure of the patient monitor