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13 12BSerial-Communication Interfaces
Kontron User's Guide
coolMonster/PM
33
13
12B
Serial-Communication Interfaces
13.1
67B
Serial Ports COMA to COMD
Four fully functional serial ports (COM A, COM B, COM C, and COM D) provide asynchronous serial
communications. The serial ports support RS-232 operation modes and are compatible with the serial-
port implementation used on the IBM Serial Adapter. You also can use COM D for RS-422/485
communications. The ports are 16550 high-speed UART compatible and support 16-byte FIFO buffers for
transfer rates up to 115.2Kbaud. All COM ports are available on internal connectors.
COM A is available through the standard DSUB9 connector, which is part of the multi-function Connector
X1 on the front. COM B to COM D are available through Connectors X15, X16 and X17 (10 pins in line). To
find the location of the serial ports on the board, please see the Appendix E: Connector Layout chapter.
13.2
68B
RS-232 Connectors
The following table shows the pin-out of COM A.
COM A to COM D are available through Connectors X18, X19, X20 and X21. To have the signals available
on the standard serial interface connectors DSUB9 or DSUB25, an adapter cable is required. A 9-pin
DSUB cable is available from Kontron (KAB-DSUB9-2, Part Number 96017-0000-00-0).
Header Pin Signal Name Function In / Out
1 DCD1/2/3/4 Data Carrier Detect In
2 DSR1/2/3/4 Receive Data In
3 SIN1/2/3/4 Transmit Data Out
4 RTS1/2/3/4 Data Terminal Ready Out
5 SOUT1/2/3/4 Signal Ground --
6 CTS1/2/3/4 Data Set Ready In
7 DTR1/2/3/4 Request to Send Out
8 RI1/2/3/4 Clear to Send In
9 GND Ring Indicator --
1
9
2
10
10 VCC* +5V --
Notes
: (*) To protect the external power lines of peripheral devices, make sure that:
-- the wires have the right diameter to withstand the maximum available current
-- the enclosure of the peripheral device fulfils the fire-protecting requirements of IEC/EN 60950.
To find the location of the serial ports on the board, please see the Appendix E: Connector Layout
chapter.