T-Touch Retail Application A1.10
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2.2 RS-232 Connection
The RS-232 port is located on the side or rear of the scale (refer to component description). It is
a DB9 connector, and its signals are defined in the following
.
Serial Interface: Scale – PC / Printer connection:
RS232 Port of Scale
9
Pin Port of Computer / Printer
RS232 Port of Scale
25
Pin Port of Computer / Printer
RXD 2
TXD 3
GND 5
3 -Transmit Data
2 - Receive Data
5 - Ground
1 - Carrier Detect
4 - Data Terminal
6 - Data Set
7 - Send Request
8 - Send Clear
RXD 2
TXD 3
GND 5
3 -Transmit Data
2 - Receive Data
7 - Ground
4 - Send Request
5 - Send Clear
6 - Data Set
8 - Carrier Detect
20 - Data Terminal
Pin 2 : RXD
Pin 3 : TXD
Pin 4 : VCC
Pin 5 : GND
