The Omron CJ2M-CPU31 is a compact PLC CPU unit from the SYSMAC CJ2M series designed for machine automation and control applications. This entry-level controller features a built-in EtherNet/IP port for industrial network connectivity and supports up to 2,560 I/O points across 40 mountable units with a maximum of 3 expansion racks. The unit provides 5K steps of program capacity and 64K words total data memory (32K words DM plus 32K words EM in 1 bank). With an LD instruction execution time of 0.04 µs, it delivers fast processing performance. The CPU includes a standard USB 2.0 programming port and an option board slot for adding RS-232C or RS-422A/485 serial communication capabilities. It supports multiple programming languages including Ladder Diagram and Structured Text, features a built-in real-time clock, and is compatible with existing CJ1 series I/O and communication modules. Item Details Brand Name: Omron Manufacturer: Omron Electronics Item Type Name: Programmable Logic Controller CPU Unit Product Family / Series: SYSMAC CJ2M Series Model: CJ2M-CPU31 Product Specifications program_capacity: 5K steps data_memory_capacity: 64K words (DM: 32K words, EM: 32K words x 1 bank) ld_instruction_execution_time: 0.04 µs mov_instruction_execution_time: 0.12 µs floating_point_instruction_time: 0.86 µs io_capacity: 2560 points maximum mountable_units: 40 units (3 expansion racks max) current_consumption_5v: 0.5 A ethernet_port: Built-in EtherNet/IP (100Base-TX) usb_port: USB 2.0, 12 Mbps, 5 m max distance serial_option_board_slot: Yes (RS-232C or RS-422A/485) programming_languages: Ladder Diagram (LD), Structured Text (ST) real_time_clock: Yes pulse_io_module_support: Up to 2 modules (unit version 2.0 or later) Additional Details Standards: cULus, CE Operating Environment: Must be free from corrosive gases Mounting: DIN rail Compatibility: Compatible with all existing CJ1 power supply, I/O, control and communication units Measurements Weight: 190 g Dimensions: 90 mm H x 62 mm W x 84.5 mm D
