TP850
User’s Manual
- 41 -
Table A-3: Pin assignments of serial interface
Pin number Signal
From
Description
2
RXD
Host
Receive data from Host
3 TXD
Printer
Sent
control
code X-ON/X-OFF and data to the Host
8 CTS
Printer
“MARK” state means printer is too busy to receive data;
“SPACE” means printer is ready to receive data.
5 GND
—
Signal
GND
4
DTR
Printer
Data terminal is ready.
The default settings of baud rate and data configuration in serial connecting way are 9600bps, 8 data
bits, parity check disabled and 1 stop bit.
TP850 printer’s serial interface can be connected with the standard RS-232C connector. When
connecting with a PC, the connecting picture is shown as figure 5-6. While connecting with an IBM PC
or a compatible PC, you can connect the cable as shown in figure 5-7.
The connecton of the serial interface:
Figure
5-5 Pin number of serial interface
Table A-3 Pin assignments of serial interface
Figure 5-6 The connection figure of
host
9 PIN
and printer
Printer 9PIN connector
Host 9PIN connector
DTR
CTS
GND
TXD
RXD
DSR
DCD
CTS
RTS
GND
RXD
TXD
4
8
5
3
2
6
1
8
7
5
2
3
5 1
9 6
Note:
①
“From” means the source where signal comes out.
②
The logical level of signal is EIA level.
