User's Manual

User manual
Guangzhou Andea Electronics Technology Co., Ltd. 8/39
http://www.gzandea.com
⚫ Stop bits:1
RS232 interface pin definition:
Figure 8 RS232 interface for host communication (DB9 connector)
Table 4 Pin definition of RS232 interface
Pin
Definition
Description
1
NC
Reserved
2
TXD
RS232 data output
3
RXD
RS232 data input
4
NC
Reserved
5
GND
Ground
6
NC
Reserved
7
NC
Reserved
8
NC
Reserved
9
NC
Reserved
Figure 9 Wiring example for connecting RS232 interface
Remarks: If the user's computer does not have an RS232 serial port, the USB to
RS232 converter of our company can be selected (non-standard products, must be
purchased separately), install the USB driver and use the reader through the USB
interface of the computer.
2.5. S1, S2 Input/output Ports
The S1 and S2 connection ports are general-purpose input/output ports, which are
expansion ports: