Here are some key features of the CJ1M-CPU12 module:

CPU: The CJ1M-CPU12 module serves as the central processing unit (CPU) of the PLC system. It executes the logic and control programs and coordinates the overall operation of the PLC.

Programming: The CJ1M-CPU12 supports ladder programming, which is a graphical programming language commonly used in PLC applications. Omron's CX-One software suite is typically used for programming and configuring the CJ1M PLC.

Memory: The module has a built-in program memory capacity of 5K steps, allowing you to develop medium-sized control applications. It also features a battery backup to retain your program and data in case of power loss.

Communication: The CJ1M-CPU12 supports various communication interfaces, including serial ports (RS-232C/RS-422A/RS-485), Ethernet, and USB. These interfaces facilitate communication with external devices such as HMIs (Human Machine Interfaces), PC systems, and other PLCs.

I/O Expansion: The CJ1M series of PLCs, including the CJ1M-CPU12, can be expanded by adding input/output (I/O) modules to cater to specific application requirements. This allows you to customize your system by adding analog or digital I/O modules, high-speed counter modules, temperature control modules, etc.