Serial interface signals – Compuprint 10200 Programmer Manual User Manual
Page 226
Interfaces
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The following table lists the RS-232/C serial interface signals:
Signal
Name
Pin
Number
Local
Connect.
Source
Remote
Connect.
Source
ISO/CC
ITT
Circuit
RS-
232/C
Circuit
Description
FRAME
GROUND
1
-
-
101
AA
This printer is shipped with pin 1 connected to
the frame ground (protective ground).
TXD
2
Printer
Printer
103
BA
Transmitted Data Signal (an output from
printer). A MARK condition is held during IDLE
communication state. An indeterminate state is
present when printer is powered off.
RXD
3
Host
Data Set
104
BB
Received data signal (an input to printer).
RTS
4
Printer
Printer
105
CA
Request to Send Signal (an output from
printer).Active HIGH level signal. It is HIGH until
the printer is powered off, then an indeterminate
state is present .
CTS
5
Data Set
106
CB
Active HIGH level signal indicates that the host
or data set is ready to receive data from the
printer.
DSR
6
Data Set
107
CC
Active HIGH level signal. Indicates that the
host or data set is ready to be connected to the
printer and is ready for data transfer.
DCD
8
Data Set
109
CF
Active HIGH level signal. Indicates that the host
is transmitting or the data set is receiving the
Data Carrier signal..
2
nd
RTS
11
Printer
120
SCA
Functionally equivalent to the DTR signal.
DTR
20
Printer
Printer
108
CD
Data Terminal Ready. Normally HIGH (ON).
Indicates that the printer is ready to initiate a
connection.