Com connectors (com1~com2), 11 com connectors (com1~com2) – Axiomtek IPC932-230-FL-ECM User Manual
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IPC932-230-FL Series U
ser’s Manual
Introduction
15
1.7.11 COM Connectors (COM1~COM2)
The COM 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
RS-422
RS-485
1
Data Carrier Detect
(DCD1)
TX1-
DATA1-
2
Data Set Ready (DSR1)
No connector
No connector
3
Receive Data (RXD1)
TX1+
DATA1+
4
Request to Send (RTS1)
No connector
No connector
5
Transmit Data (TXD1)
RX1+
No connector
6
Clear to Send (CTS1)
No connector
No connector
7
Data Terminal Ready
(DTR1)
RX1-
No connector
8
Ring Indicator (RI1)
No connector
No connector
9
Ground (GND)
GND
GND
10
Disconnect (NI)
NI
NI
11
Data Carrier Detect
(DCD2)
TX2-
DATA2-
12
Data Set Ready (DSR2)
No connector
No connector
13
Receive Data (RXD2)
TX2+
DATA2+
14
Request to Send (RTS2)
No connector
No connector
15
Transmit Data (TXD2)
RX2+
No connector
16
Clear to Send (CTS2)
No connector
No connector
17
Data Terminal Ready
(DTR2)
RX2-
No connector
18
Ring Indicator (RI2)
No connector
No connector
19
Ground (GND)
GND
GND
20
Disconnect (NI)
NI
NI