
RS232 Serial Port
Used for connecting a serial printer or modem with RS232
standard input.
It
is
fully
compatible with the IBM PC-XT
serial port.
Pin # Description
1 CHASSIS GROUND
2 TRANSMIT DATA
3 RECEIVE DATA
4 REQUEST
TO
SEND
5 CLEAR TO SEND
6 DATA SET READY
7 SIGNAL GROUND
8 CARRIER DETECT
20
DATA TERMINAL READY
22
RING INDICATOR
OTHERS NOT USED
25-pin "D" Style Connector
77
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