Omron Sysmac NX Series User Manual page 86

4 Installation and Wiring
Insertion Locations and Patterns of Coding Pins
Insert three Coding Pins each on the terminal block and on the Unit at the positions designated by the
numbers 1 through 6 in the figure below.
As shown in the following table, there are 20 unique pin patterns that you can use.
4 - 18
NX-series Analog I/O Units User's Manual for High-speed Analog Input Units (W592)