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BK-T080 user MANUAL
6. Interface signal
6.1 RS-232 Interface
6.1.1 Parameter
¾
data transfer mode:
¾
handshake mode:
¾
voltage level:
asynchronous serial communication
RTS/CTS control
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:
¾
parity checkout: None, even, or odd
¾
stop bit:
¾
connector: 9 pins serial connector（negative head）
Caution:
8 bit or 7 bit
1 bit
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 as the following table:
PIN NO
Signal
Signal
name
direction
Function
1
NO
2
RXD
Input
Data input end
3
TXD
Output
Data output end
4
DTR
Output
Data terminal is ready
5
SG
—
Signal ground
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