BK-T080III (vertical) User’s Manual
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6. Interface signal
6.1 RS-232 Interface
6.1.1 Parameter
¾
Data transfer mode: asynchronous serial communication
¾
Handshaking mode: RTS/CTS control
¾
Voltage level:
MARK= -3 to -15 V: Logic "1"/ OFF
SPACE = +3 to +15 V: Logic "0"/ ON
¾
Baud rate:
1200, 2400, 4800, 9600, 19200, 38400, 57600 bps
¾
Data bit:
8 bit or 7 bit
¾
Parity checkout: None, even, or odd
¾
Stop
bit:
1
bit
¾
Connector: 9
pins
serial connector(female)
Note
: Serial baud rate, data bit, parity bit are set by EEPROM
6.1.2 Interface linking terminal distribution and signal function
Printer signal and status is described in the following table:
PIN No.
Signal name
Signal direction
Function
1 NO
2
RXD
Input
Data input
3
TXD
Output
Data transmit
4
DTR
Output
Data terminal ready
5 SG
—
Signal
ground
6
DSR
Hang
Data set ready
7
RTS
Output
Request to send
8
CTS
Input
Allow to send
9 FG
—
Frame
ground
Table 6.1-1 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 make sure the printer is turned on and finish the initialization, then send data to the printer.
