14 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
24V, 0V: power supply input 
A, B: RS-485 com port 
COM: common ground 
X: Input 
Y: Output 
 
 
 
 
Program port is a RS-232 com port which has double functions of downloading PLC program and 
HMI pictures. The pins function of the port is as below: 
 
Pin    Function
Pin2  RXD 
Pin3  TXD 
Pin5  GND 
Pin7  RTS 
 
Xinje provides special program cable to download the PLC program or HMI program. You also 
can make the cable by yourself. Please see the pin connection between PC and the port. 
 
MODE
:   
XP3-
18
R
SN
:      20060502118
DATE
:    20060510
 
无锡市信捷科技电子有限公司
Points  connect 
with BD board   
Program 
port 
Power 
supply 
RS-485 Com port  Output points  Input points 
In-out points arrangement 
Program port