
Standards and Specifications
External Connectors
External Connectors
RS-232  Serial Port
Conforms to 
Pin Number  | Function  | 
  | 
  | 
  | 
  | 
  | 
1  | DCD  | 
  | 
  | 
  | 
  | 
  | 
2  | RXD  | 1  | 2  | 3  | 4  | 5  | 
  | 
  | 
  | 
  | 
  | ||
3  | TXD  | 
  | 
  | 
  | 
  | 
  | 
4  | DTR  | 
  | 
  | 
  | 
  | 
  | 
5  | Ground  | 
  | 
  | 
  | 
  | 
  | 
6  | DSR  | 
  | 6  | 7  | 8  | 9  | 
  | 
  | 
  | ||||
7  | RTS  | 
  | 
  | 
  | 
  | 
  | 
8  | CTS  | 
  | 
  | 
  | 
  | 
  | 
9  | R1  | 
  | 
  | 
  | 
  | 
  | 

Standards and Specifications
External Connectors
Conforms to 
Pin Number  | Function  | 
  | 
  | 
  | 
  | 
  | 
1  | DCD  | 
  | 
  | 
  | 
  | 
  | 
2  | RXD  | 1  | 2  | 3  | 4  | 5  | 
  | 
  | 
  | 
  | 
  | ||
3  | TXD  | 
  | 
  | 
  | 
  | 
  | 
4  | DTR  | 
  | 
  | 
  | 
  | 
  | 
5  | Ground  | 
  | 
  | 
  | 
  | 
  | 
6  | DSR  | 
  | 6  | 7  | 8  | 9  | 
  | 
  | 
  | ||||
7  | RTS  | 
  | 
  | 
  | 
  | 
  | 
8  | CTS  | 
  | 
  | 
  | 
  | 
  | 
9  | R1  | 
  | 
  | 
  | 
  | 
  |