DS2400N QUICK GUIDE 
4  
 
25-pin Connector Pinout for DS2400N 
 
The table below gives the pinout of the 25-pin male D-sub connector for connection to the power supply and 
input/output signals. Use this pinout when the DS2400N reader is connected by means of the 25-pin connector: 
 
 
 
13
2514
1 
 
Figure 2 - 25-pin Male D-sub Connector 
 
 
25-pin D-sub male connector pinout 
Pin Name  Function 
13, 9  Vdc  Power supply input voltage + 
25, 7  GND  Power supply input voltage - 
1  CHASSIS  Cable shield connected to chassis 
18  I1A  External Trigger A (polarity insensitive) 
19  I1B  External Trigger B (polarity insensitive) 
6  I2A  Input 2 A (polarity insensitive) 
10  I2B  Input 2 B (polarity insensitive) 
8  O1+  Output 1 + 
22  O1-  Output 1 - 
11  O2+  Output 2 + 
12  O2-  Output 2 - 
20 RX  Auxiliary RS232 RX 
21 TX  Auxiliary RS232 TX 
23  ID+  ID-NET™ network + 
24 ID-  ID-NET™ network - 
14, 15, 16, 17  NC  Not Connected 
Pin Name RS232 
RS485 
Full-Duplex 
RS485 
Half-Duplex 
2 TX TX+ RTX+ 
3 RX 
*RX+ 
 
4 RTS TX- RTX- 
5 
MAIN INTERFACE 
(SW SELECTABLE) 
CTS 
*RX- 
 
 
* Do not leave floating, see Reference Manual for connection details.