Intel H110

15
(2) COM1 (9-pin Block): RS232/422/485 Port
COM1 port can function as RS232/422/485 port. In normal settings COM1 functions
as RS232 port. With compatible COM cable COM1 can function as RS422 or RS 485
port. User also needs to go to BIOS to set ‘Transmission Mode Select’ for COM1
at first, before using specialized cable to connect different pins of this port.
RS232 DCD
RS232 SIN
RS232 SOUT
RS232 DTR
GND
RS232 RI
RS232 CTS
RS232 RTS
RS232 DSR
RS232 Mode
Pin1
For RS422 Mode
RS422TX-(B)
RS422TX+(A)
RS422RX+(A)
RS422RX-(B)
(B)
For RS485 Mode
RS485 D-(B)
RS485 D+(A)
(3) COM2/COM3 (9-pin Block): RS232 Port
RS232 DCD
RS232 SIN
RS232 SOUT
RS232 DTR
GND
RS232 RI
RS232 CTS
RS232 RTS
RS232 DSR
RS232 Mode
Pin1