JETWAY MI215 Series User Manual page 26

COM1/2/3/4/5/6(9-pin): Serial Port Headers
*COM1/2: RS232/422/485 Serial Port Header.
COM3/4/5/6: RS232 Serial Port Header.
*COM1
*COM2
COM3
6
Pin 1
*Note: COM1 & COM2 header can function as RS232/422/485 port header. In normal
settings COM1 & COM2 function as RS232 header. With compatible COM cable COM1
& COM2 can function as RS422 or RS 485 header. User also needs to go to BIOS to set
'Transmission Mode Select' (refer to Page-36/37) at first, before using specialized
cable to connect different pins of this port.
COM6
COM4
COM5
Pin NO. RS232
Pin 1 DCD - TX-
Pin 2 SIN - TX+
Pin 3 SOUT - RX+
Pin 4 DTR - RX-
Pin 5 GND GND
Pin 6 DSR - NC
Pin 7 RTS - NC
Pin 8 CTS - NC
Pin 9 RI -
NC
21
*RS422 *RS485
(optional) (optional)
DATA-
DATA+
NC
NC
GND
NC
NC
NC
NC