Com Connectors (Com1~Com5) - AXIOMTEK SHB130 Series User Manual

SHB130 LGA1150 Full-size CPU Card
2.4.17

COM Connectors (COM1~COM5)

The COM1 port supports RS-232/RS-422/RS-485 mode operation, see table below for
its pin assignments. You can change the transmission mode via BIOS setting.
Pin RS-232
Data Carrier
1
Detect (DCD)
Data Set Ready
2
(DSR)
Receive Data
3
(RXD)
Request to Send
4
(RTS)
Transmit Data
5
(TXD)
Clear to Send
6
(CTS)
Data Terminal
7
Ready (DTR)
Ring Indicator
8
(RI)
9 Ground (GND)
10 Disconnect (NI)
The COM2~COM5 ports support RS-232 only, see table below.
Pin Signal
1 Data Carrier Detect (DCD)
2 Data Set Ready (DSR)
3 Receive Data (RXD)
4 Request to Send (RTS)
5 Transmit Data (TXD)
6 Clear to Send (CTS)
7 Data Terminal Ready (DTR)
8 Ring Indicator (RI)
9 Ground (GND)
10 Disconnect (NI)
18
RS-422 RS-485
TX- DATA-
No connector No connector
TX+ DATA+
No connector No connector
RX+ No connector
No connector No connector
RX- No connector
No connector No connector
GND GND
NI NI
COM2,COM3,COM4,COM5
Board and Pin Assignments