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3.2 Printer Unit Description
1)
Paper End Sensor (18): Paper presence/absence detection
2)
Paper jam Sensor (19): Paper jam detection
3)
Key Function (3):
Continuous paper feed mode
In standby mode, printer feeds paper after pressing this button;
Press this button and turn on the printer, the printer will perform paper calibration.
If occurs paper feeding or calibration error, press this button to clear the errors.
4)
Power Status Indicator (1)
Display power on/off status
5)
Alarm LED (2)
Display printer status. Under normal status, alarm LED is off; under error status (like paper end, etc.),
alarm LED will flash.
6)
Serial Interface Socket (see the picture below)
Interface cable is customized and interface connector is 4P single row with 2.54 double-end cable. Pin
assignments are as following.
7)
Power Socket
2P 3.96 socket is used on printer port. (The upper one is Pin 1 for normally placed printer).
Figure below displays the cable wiring.
Pin
Signal
1
RTS/DTR
2
TXD
3
RXD
4
GND
Pin
Signal
1
+24V
2
GND
4
BT-UC056Ⅲ User's Manual
Direction
output
Serial handshaking signal
Output
Serial data output port
Input
Serial data input port
――
Signal ground
Direction
Input
Power supply+24V
Output
Power supply GND
Function
Function
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