Omron CJ2M-CPU31 CJ Series PLC with Built-in EtherNet/IP 5K Steps

Omron CJ2M-CPU31 is a modular programmable logic controller from the SYSMAC CJ series. CPU unit with built‑in EtherNet/IP port. 5K steps program capacity, 32K words data memory (DM), and 32K words × 1 bank extended memory (EM). Maximum 2,560 I/O points and up to 3 expansion racks. Suitable for medium‑sized machine automation and OEM control systems.

Applications:

• Packaging machinery control

• General machine automation

• Material handling and conveyor systems

• Manufacturing line monitoring

Core Specifications:

• Program capacity: 5 K steps

• Data memory (DM): 32 K words

• Extended memory (EM): 32 K words × 1 bank

• LD instruction execution time: 0.04 µs

• Total I/O capacity: 2,560 points / 40 units

• Expansion racks: 3 racks max.

• Built‑in communication ports: EtherNet/IP (Ethernet TCP/IP), USB programming port

• Option port: supports RS‑232C or RS‑422A/485 via serial option module

• Power supply: external power supply unit required (sold separately)

• Mounting: DIN rail or panel

• Certifications: CE, cULus, Lloyd, NK, RoHS

• Dimensions (H × W × D): 90 mm × 62 mm × 84.5 mm

• Weight: approx. 190 g

• Operating temperature: 0…55 °C

System Integration:

• This CPU unit belongs to the Omron SYSMAC CJ series.

• Programming and configuration performed using CX‑Programmer (version 9.1 or higher).

• Compatible with CJ1 power supply units, I/O units, control units, and communication units.

• Expands with CJ series I/O and Special I/O Units via the CJ I/O bus.

• Requires a CJ series power supply unit (e.g., CJ1W‑PA205R) and optionally a backplane for multi‑rack configurations.

Related Products:

• CJ1W‑PA205R – Power supply unit, 100‑240 V AC, 25 W

• CJ1W‑ID211 – 16‑point DC input unit

• CJ1W‑OD212 – 16‑point PNP transistor output unit

• CJ1W‑OC211 – 16‑point relay output unit

• CJ1W‑CIF11 – RS‑485 adapter for serial port expansion