Com4 Rs485 Signal 120Ω Resistive Termination Select Jumper(Jp17); Com Box Headers (Com2, Com3, Com4, Com5, Com6); Com3 Mode Select (Jp4, Jp5, Jp6) - AXIOMTEK IMB541 User Manual

2.3.23 COM4 RS485 Signal 120Ω Resistive termination Select
Jumper(JP17)
Use these jumpers (3x1-pin p=2.54mm) to set signal
Function
Disable (Default)
Enable
2.3.24

COM BOX Headers (COM2, COM3, COM4, COM5, COM6)

The motherboard comes with 5x2-pin p=2.54mm box headers for COM serial port
interfaces.
Pin Signal
1 DCD#
3 RXD#
5 TXD#
7 DTR#
9 GND
2.3.25

COM3 Mode Select (JP4, JP5, JP6)

Use these jumpers (3x2-pin p=2.54mm) to set COM3 port to operate in RS-232, RS-422
or RS-485 communication mode.
Function
RS232(Default)
RS422
RS485
Board and Pin Assignments
Setting
1-2 close
2-3 close
Pin Signal
2 DSR#
4 RTS#
6 CTS#
8 RI#
10 N/C
Setting
JP4: 1-2
JP5: 3-5、4-6
JP6: 3-5、4-6
JP4: 3-4
JP5: 1-3、2-4
JP6: 1-3、2-4
JP4: 5-6
JP5: 1-3、2-4
JP6 (No Effect)
IMB540 User's manual
21