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(3) RS-232C Interface
RS-232C
25-pin D SUB CONNECTOR
Either 8-pin (DCD) o r 22-pin (RD) can be sclccted by software control.
Remarks
Protective ground
Transmit data
Receive data
Request to send
Transmission authorized
Data set relay
Signal ground
Data carrier detect
Data carrier ready
Bell detect
Pin number
1
2
3
4
5
6
7
8
l
2 0
22
25
Signal name
G N D
T x D
RxD
RTS
CTS
DS R
G N D
DCD
D T
R
R D
- -
-
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