13
2-2 Connectors and Headers
2-2-1 Connectors
(1) Rear I/O Connectors
(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 (
refer to
Page 30
) at first, before using specialized cable to connect different pins of this port.
For RS422 Mode
RS422 TX(B)
RS422 TX(A)
RS422 RX(A)
RS422 RX(B)
For RS485 Mode
RS485 D-(B)
RS485 D+(A)
Line-Out Port
USB 2.0 Ports
RJ-45 LAN Port
USB 3.0 Port
USB 2.0 Port
DVI-I Port
COM1 Port
DC 12V
Power-in
Connector
