COM/RJ11 Expansion Board
                The POS03 is compatible with Shuttle AIO P5 series. It provides one RJ11, three RS232, one RS232/RS422/RS485 with 0V/5V/12V support and two USB ports for flash memory, MSR or 4G dongle module.
                 
              
 
              
              
                
                  
                  
                  
                  
                    | Purpose | CM009 full function DB for P51U. -DIO RJ11 port  for cash drawer.
 -The internal USB connector is for expansion stick
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                    | External Port(s) | COM1(RS232) x1 COM2(RS232) x1
 COM3(RS232/RS422/RS485) x1
 (Support 0V/+5V/+12V)
 COM4(RS232) x1
 DIO RJ11 port x1
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                    | Internal Port(s) | USB2.0 X2 |