BT-UC156 User’s Manual
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6. Interface Signal
6.1 Serial interface
The interface cable is customerized and the interface connector is double socket with 4PIN 2.54mm
between each other. Pin signal is defined as below figure:
Interface signal order is as below:
Pin No.
Signal
name
Signal
direction
Function
1
RTS/DTR
Output
Serial handshaking signal
2
TXD
Output
Serial data output port
3
RXD
Input
Serial data input port
4
GND
--
Signal ground
Users can check interface settings via printing configuration sample. The default Serial interface settings:
19200bps baud rate, 8 data bit, without checkout, 1 stop bit, hardware handshaking (shall not check
handshaking signal when the printer returns data).