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13
S erial-Communication Interfaces
1 2 B
13.1
S erial Ports COMA to COMD
6 7 B
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
R S-232 Connectors
6 8 B
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
1
DCD1/2/3/4
2
DSR1/2/3/4
1
2
3
SIN1/2/3/4
4
RTS1/2/3/4
5
SOUT1/2/3/4
10
9
6
CTS1/2/3/4
7
DTR1/2/3/4
8
RI1/2/3/4
9
10
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.
Kontron User's Guide
coolMonster/PM
Function
Data Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request to Send
Clear to Send
GND
Ring Indicator
VCC*
+5V
13 12BSerial-Communication Interfaces
In / Out
In
In
Out
Out
--
In
Out
In
--
--
33
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