The Serial Interface; Rs-232C Connector Pin Assignments; Rs232/C Serial Interface Signals - Compuprint X03 User Manual

The Serial Interface

The 4247 Printer attaches to a host or controller with the RS-232C Serial Interface.
A single 9-pin D-connector mounted directly on the adapter card allows
attachment to the interface.
The RS-232C interface uses a standard serial cable up to 15.2 m (50 ft) in length,
with transmission rates up to 19.2 Kbps.

RS-232C connector pin assignments

Table 31 lists the RS232/C serial interface signals:
168
User's Guide
Pin Number Signal Name
16 LOGIC GND
17 CHASSIS GROUND
18 +5 VDC
19 - 30 GROUND
31 -INIT
32 -ERROR
33 GROUND
34, 35 Unused
36 -SLCT IN
Table 31. RS232/C serial interface signals
Signal Pin Connect.
Name Number
SIGNAL 5
GROUND
TXD 3
RXD 2
RTS 7
CTS 8
DSR 6
DCD 1
2nd RTS 9
Local Remote
Connect.
Source Source Description
– – Always connected to the 0 Volts of the
Power Supply
Printer Printer 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.
Host Data Set Received data signal (an input to printer).
Printer Printer 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 .
Data Set Active HIGH level signal indicates that the
host or data set is ready to receive data
from the printer.
Data Set 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.
Data Set Active HIGH level signal. Indicates that
the host is transmitting or the data set is
receiving the Data Carrier signal.
Printer Functionally equivalent to the DTR signal.
Description
Logic Ground
Chassis Ground
External Power
Ground
Initialize Printer
Printer Error
Ground
Make printer selected