Kontron Embedded Computers PCI-760 User Manual page 28

9. Jumpers and Connectors Overview
9.1.3.10. J16: Serial Port Connector COM2
The 10-pin box header is to be used with the supplied serial cable. This interface is RS232 (default) and can be
configured as RS422 or RS485 (BIOS Setup).
For RS422 and RS485 mode, please install the jumper caps (JP1 and JP2) to use the onboard
termination resistors (120ohm).
RS232 mode (default)
RS422 point-to-point mode:
The RX signal is always enabled via application software.
RS485 party line mode:
The RX signal is enabled when COM2 RTS is deasserted via application software.
The TX signal is enabled when COM2 RTS is asserted via application software.
COM2-pin assignment as RS232 (default):
J16: Boxed Header,
DIP 10-pin
1 2
9 10
COM2
COM2 pin assignment as RS422:
J16: Boxed Header,
DIP 10-pin
1 2
9
10
COM2
26
RS232
(Pinning on the on-board header)
Pin # Signal Name
1 DCD, Data carrier detect
2 DSR, Data set ready
3 RxD, Receive data
4 RTS, Request to send
5 TxXD, Transmit data
6 CTS, Clear to send
7 DTR, Data terminal ready
8 RI, Ring indicator
9 GND, ground
10 12 V, fused
RS422
(Pinning on the on-board header)
Pin # Signal Name
1 NC
2 NC
3 RxD–, Receive data
4 RxD+, Receive data
5 TxD–, Transmit data
6 TxD+, Transmit data
7 NC
8 NC
9 GND, ground
10 12 V fused
D-SUB
Connector
Pining on the
supplied cable
connector:
D-SUB
Connector
Pining on the
supplied cable
connector:
RXD–
RXD+
TXD–
TXD+
PCI-760 – User's Manual (V1.00)