SYSMAC CJ Series PLC (CPU unit) with improved basic performance and an increased programming capacity.[Features]· The robust performance of the CJ1M has been further advanced with this CPU unit.· A maximum of 40 units can be connected per CPU.· Equip pulse I/O modules to add position control functions to any CPU.· Features a built-in serial port. (The CJ2M-CPU3□ is available with a serial option board mounted.)· A "PLC replacement selector tool" and "adapter for reusing I/O cabling" are also available.[Applications]· Can be used for tools and hardware that can be replaced while using your current PLC.