Appendix 4 Using NT-AL001 Converters 
•  When the converter unit is connected to a C200HX/HG/HE (-ZE), CQM1H, CS1G/H 
model of OMRON PLC as an RS-422A device, set DIP switches SW1-5 and SW1-6 as 
indicated below. 
 
 
A-4-5 Pin Arrangement 
The converter unit has a terminal block for an RS-422A/485 interface connection and a 
connector for an RS-232C interface connection. 
The pin arrangements for the RS-422A/485 terminal block and the RS-232C connector 
are as follows. 
RS-422A/485 Terminal Block  
 
 
 
RS-232C Connector 
 
 
 
A-29