Supermicro SuperServer E100-9W-H User Manual page 37

COM Ports
Four Serial COM ports are located on the rear I/O plate. COM1/COM2 supports RS-232/
RS-422/RS-485 ports, and COM3/COM4 supports only a RS-232 port.
RS-232 D-SUB Connector
Pin Definitions
Pin# Definition Pin#
1 DCD 2
3 TXD 4
5 GND 6
7 RTS 8
9 RI
RS-422 D-SUB Connector
Pin Definitions
Pin# Definition Pin#
1 TX- 2
3 RX+ 4
5 GND 6
7 N/A 8
9 N/A
RS-485 D-SUB Connector
Pin Definitions
Pin# Definition Pin#
1 DATA- 2
3 N/A 4
5 GND 6
7 N/A 8
9 N/A
37
Chapter 3: Motherboard Connections
Definition
RXD
DTR
DSR
CTS
Definition
TX+
RX-
N/A
N/A
Definition
DATA+
N/A
N/A
N/A