Com3, Com1: (type db9) – Acnodes PCH 3591 User Manual
Page 16
Ground
5
6
DSR
RTS
7
8
CTS
RI
9
10
NC
8. COM3
: (2.0mm Pitch 1x6 box Pin Header),it provides selectable RS422/RS485
serial signal output from BIOS configuration.
RS422 Type (option)
RS485 Type
(default)
Signal Name
Pin#
Pin#
Signal Name
422RX-
1
1
NC
422RX+
2
2
NC
422TX-
3
3
485-
422TX+
4
4
485+
Ground
5
5
Ground
+5V
6
6
+5V
NC
7
7
NC
NC
8
8
NC
NC
9
9
NC
9. JP3:
(2.0mm Pitch 2x3 Pin Header),COM1 setting jumper, pin 1~6 are used to
select signal out of pin 9 of COM1 port.
JP3 Pin#
Function
Close 1-2 RI (Ring Indicator)
(default)
Close 3-4
COM1 Pin9=+5V
(option)
Close 5-6
COM1 Pin9=+12V
(option)
10. COM1: (Type DB9),
Rear serial port, standard DB9 serial port is
provided to make a direct connection to serial devices. COM1 port is controlled by
pins No.1~6 of
JP3,select output Signal RI or 5V or 12v, For details, please refer to
description of JP3.