Com Ports (Com2/ Com3/ Com4) - Acnodes FES93 Series User Manual

2.3.2

COM Ports (COM2/ COM3/ COM4)

Implemented
up to 921600 bps baud rate, the second D-Sub male connector (COM2/ 3/ 4) can be
configured in BIOS as single RS-422/ 485 port (COM2) or three 3-wire RS-232 ports
(COM2/COM3/COM4). Please refer to
operation mode. An optional 1-to-3 Y-cable is available to connect three RS-232
devices.
COM2 /3/ 4 Pin
The following table describes the pin definition of the COM port
3-port RS-232 COM2/ 3/ 4
Pin# COM2
1
2 RX
3 TX
4
5 GND
6
7
8
9
using industrial-grade ITE8786 Super IO chip (-40 to 85°C) and provide
COM3 COM4
TX
GND GND
RX
TX
RX
36
COM2/ 3/ 4 Port Configuration
1-to-3 Y-cable
Single port RS-422/ 485
Pin#
1
2
3
4
5
6
7
8
9
for configuring
RS-422 RS-485
TxD+ TxD+/
RxD+
RxD+
RxD-
GND GND
TxD- TxD-/ RxD-