AXIOMTEK SYM76996VGGA Manual page 19

User's Manual
JCOM3/4/5/6: Serial Port Connectors
JP3/4/5/6: Voltage Switch jumpers for JCOM3/4/5/6 ports
The headers are for controlling the Pin9 of JCOM3/4/5/6 ports to switch
Ring/5V/12V.
Remark:
Max output: 12V@500mA for each COM port
18
Pin Assignment Pin Assignment
1 -PDCD 2
3 PSOUT data 4
5 GND 6
7 -PRTS 8
9 Ring/5V/12V 10
2 1
Pin 1-2 Close:
Pin9=5V
4 3
Pin 3-4 Close:
Pin9=Ring
(Default)
6 5
Pin 5-6 Close:
Pin9=12V
PSIN
-PDTR
-PDSR
-PCTS
NC