BP-002 User's Manual
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5.2.4 Serial Interface
BP-002 printer’s serial interface is compatible with RS-232C protocol, supporting RTS/CTS and
XON/XOFF handshaking protocol. Its connector is a DB-9 type connector and each pin’s
assignments are shown as below.
Table A-4 Pin assignments of the 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 in serial connecting way are 9600bps, 8 bits, parity check disabled and 1 stop bit.
BP-002 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 connection of serial interface:
Figure 5-5 Pin number of serial interface
Figure 5-6 The connection figure of
host
9 PIN
and printer
DTR
CTS
GND
TXD
RXD
DSR
DCD
CTS
RTS
GND
RXD
TXD
4
8
5
3
2
6
1
8
7
5
2
3
Printer 9-Pin connector
Host 9-Pin connector
Note:
①
“From” means the source where signal comes out.
②
Signal level is EIA level.
