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CJ2M-CPU31

Omron CJ2M-CPU31 CJ2M Series PLC CPU Unit

SKU: CJ2M-CPU31

USD 260.00

Omron CJ2M-CPU31 is a CJ2M series PLC CPU unit with 5K program capacity and built-in EtherNet/IP for networked machine control.

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Product Overview

CJ2M-CPU31 belongs to Omron CJ2M controller family and is used in modular PLC systems where expansion flexibility and maintainable architecture are priorities. CJ2M platforms are commonly selected for machine lines, utilities, and retrofit projects that need stable long-term support and broad module options. This CPU model is often deployed where control complexity exceeds compact PLC limits while preserving practical panel integration. Engineering teams should evaluate memory and scan-time requirements, module topology, communication interface needs, and growth roadmap. Commissioning should include I/O map verification, sequence timing checks, and fault recovery behavior validation. CJ2M-CPU31 is typically chosen for dependable modular control in installations where lifecycle continuity and serviceability are key business requirements.

  • SKU: CJ2M-CPU31
  • Series: CJ2M
  • I/O: 2560 I/O

Best-Fit Applications

  • Modular machine control in packaging/assembly lines
  • Utility panel automation with scalable I/O needs
  • Retrofit migration from legacy CJ/CS platforms
  • Process sub-system sequencing and interlock control
  • Distributed station coordination in production lines
  • Long-lifecycle industrial control standardization

Buying Checklist

  • Validate CPU class against program size and scan-time targets.
  • Plan communication and module topology before final BOM.
  • Assess future expansion requirements to avoid early redesign.
  • Define backup and restore procedures for CPU program safety.
  • Maintain spare and lifecycle strategy for uptime-critical systems.

Technical Specifications

Model CJ2M-CPU31
Series CJ2M
Type PLC CPU Unit
Program Capacity 5K steps
Data Memory 32K words
Built-in Ports EtherNet/IP, USB
Max I/O Points 2560 points
LD Instruction Time 0.04μs
High-Speed Counter 100kHz 2-axis
Pulse Output 100kHz 2-axis
Expandable Units Up to 40 units
Battery Life 5 years
Operating Temperature 0 to +55°C

FAQ for CJ2M-CPU31

What's the difference between CPU11 and CPU31?
CPU31 has built-in EtherNet/IP. CPU11 has USB only. Same program capacity (5K), same I/O capacity. Choose CPU31 when Ethernet connectivity is needed.
Can this CPU act as EtherNet/IP scanner?
Yes, CJ2M-CPU31 can be EtherNet/IP adapter (slave) or scanner (master). As scanner, can control remote I/O, drives, and other EtherNet/IP devices.
What motion control capabilities does this CPU have?
Built-in 2-axis 100kHz pulse output. Suitable for simple positioning applications. For more axes, add CJ1W-NC position control units.
Is this CPU suitable for small machines?
Yes, 5K capacity suits small to medium machines. Built-in EtherNet/IP enables HMI connectivity, data collection. Cost-effective for networked small machines.

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