SKU: CJ2M-CPU31
Omron CJ2M-CPU31 CJ2M Series PLC CPU Unit
Omron CJ2M-CPU31 is a CJ2M series PLC CPU unit with 5K program capacity and built-in EtherNet/IP for networked machine control.
USD 260.00 per unit, volume discounts available
- In stock, ships in 24h
- 100% genuine Omron
- 1-year manufacturer warranty
- Worldwide delivery
Key Features
- CJ2M modular PLC CPU platform
- Supports scalable rack-based control architectures
- Suitable for machine, utility, and process panel systems
- Maintains continuity with broad CJ module ecosystem
- Useful in retrofit modernization with limited downtime
- Supports structured commissioning and diagnostics workflows
Modular CJ2M CPU for Scalable Industrial Automation
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.
Typical 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 |
Frequently Asked Questions
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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