BT-T080R User’s Manual
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6 Interface signal
6.1 RS-232 interface (optional)
6.1.1 Parameter
1) Data transfer mode: asynchronous serial communication
2) Handshaking mode: RTS/CTS
3) Level
：
MARK= -3 to -15 V: Logic "1"/ OFF
i.
SPACE = +3 to +15 V: Logic "0"/ ON
4) Baud
rate
：
1200, 2400, 4800, 9600, 19200, 38400, 57600 bps
5) Data
bit
：
8 bit or 7 bit
6) Parity
checkout
：
None, even, or odd
7) Stop
bit
：
1bit
8) Connector
：
9-pin serial interface connector (female type)
Note:
Serial baud rate, data bit and parity bit are set by EEPROM.
6.1.2 Interface linking terminal distribution and signal function
Printer signal and status is described as the following table:
Pin
Signal name
Signal direction
Function
1 —
2 RXD
Input
Receive
data
3 TXD Output
Transmit
data
4
DTR
Output
Data terminal ready
5 SG
—
Signal
ground
6
DSR
—
Data set ready
7
RTS
Output
Request to send
8
CTS
Input
Allow to send
9 FG
—
Frame
ground
Table 6.1.2 Interface and pin explanation
6.1.3 Demonstration of interface connection
Host side
Printer side
TXD---------------RXD
RXD---------------TXD
DSR---------------DTR
CTS---------------RTS
RTS---------------CTS
DTR---------------DSR
FG ---------------FG
SG ---------------SG
Note:
Please send data to the printer after the printer is powered on and finishes initializing.
