CJ1M-CPU21 Compact Programmable Controller with High-Speed Processing

Comprehensive Product Overview

The Omron CJ1M-CPU21 represents the pinnacle of programmable logic controller (PLC) engineering within the acclaimed CJ1 series, delivering industrial-grade automation solutions for mission-critical applications. Designed to excel in environments demanding uncompromising precision, rapid execution, and operational resilience, this advanced CPU unit serves as the central intelligence for complex control architectures. Its modular design enables seamless integration with a comprehensive range of I/O modules while supporting versatile industrial communication protocols. The compact yet robust construction ensures reliable performance across diverse industrial settings, from manufacturing floors to harsh processing facilities. Backed by Omron's standard 1-year manufacturer warranty, the CJ1M-CPU21 provides peace of mind for automation investments.

Advanced Technical Features

• Ultra-Fast Processing Architecture: Leverages high-speed RISC technology to execute basic instructions in just 0.1 µs, enabling real-time control responsiveness for time-sensitive automation sequences including high-speed counting and precision motion control applications.
• Enhanced Memory Configuration: Features substantial 20,000-step program memory capacity for complex ladder logic and 128,000-word data memory (equivalent to 256KB) for extensive data logging, recipe storage, and process parameter management.
• Scalable I/O Architecture: Supports flexible system expansion up to 960 digital/analog I/O points through CJ-series expansion units and special function modules, accommodating evolving automation requirements.
• Space-Optimized Design: Compact dimensions of 31 mm (W) × 90 mm (H) × 65 mm (D) and lightweight construction (200 g) enable high-density panel mounting, reducing control cabinet footprint while maximizing space utilization.
• Energy-Efficient Operation: Consumes only 1.5W at 5V DC (supplied via CPU mounting backplane), minimizing energy costs while maintaining peak processing performance in continuous operation environments.
• Advanced Communication Capabilities: Integrated RS-232C port supports direct programming and host communication, with optional expansion for Ethernet (CJ1W-ETN21) or DeviceNet (CJ1W-DRM21) networks enabling seamless integration into Industry 4.0 architectures.
• Industrial Environmental Resilience: Engineered for reliable operation across 0°C to 55°C temperature ranges with storage tolerance from -25°C to 75°C, featuring vibration resistance up to 10-57Hz (0.075mm amplitude) and 57-150Hz (1G acceleration).
• Manufacturer Warranty Protection: Includes comprehensive 1-year manufacturer warranty covering material and workmanship defects, validating Omron's commitment to product quality and durability.

Industrial Application Solutions

The Omron CJ1M-CPU21 PLC delivers robust control capabilities across diverse industrial automation sectors, providing deterministic performance for:

• Precision Machine Control Systems: Advanced control for CNC machining centers, multi-axis robotic work cells, semiconductor fabrication equipment, and automated assembly stations requiring microsecond-level timing precision.
• Continuous Process Automation: Reliable monitoring and control in pharmaceutical batch processing, chemical reactor management, food & beverage production lines, and water treatment facilities with extensive I/O handling requirements.
• High-Speed Assembly Automation: Synchronization of precision assembly processes in automotive component manufacturing, electronics PCB population lines, and consumer goods production with rapid cycle time demands.
• Intelligent Packaging Machinery: Integrated control for vertical form-fill-seal systems, labeling applications, blister packaging equipment, and carton erectors requiring precise motion coordination and high I/O point density.
• Automated Material Handling: Centralized control for AS/RS warehouses, conveyor sorting systems, palletizing cells, and AGV docking stations with distributed I/O and network communication requirements.

Detailed Technical Specifications

Technical Parameter	Precise Specification
Manufacturer Model Number	CJ1M-CPU21
Processor Architecture	High-performance RISC-based CPU
Instruction Execution Speed	0.1 µs (LD instruction benchmark)
Program Memory Capacity	20,000 ladder program steps
Data Memory Allocation	128K words (DM: 32K words, EM: 96K words)
Maximum Configurable I/O Points	960 points (including remote I/O via Controller Link)
Physical Dimensions (W × H × D)	31 mm × 90 mm × 65 mm
Unit Weight	200 grams ±5%
Operating Voltage	5 V DC ±5% (backplane supplied)
Typical Power Consumption	1.5 W (maximum 1.8 W)
Operating Temperature Range	0°C to 55°C (32°F to 131°F) with 25-85% RH non-condensing
Storage Temperature Range	-25°C to 75°C (-13°F to 167°F)
Communication Interfaces	Built-in RS-232C (peripheral port), expansion slots for communication modules
Warranty Coverage	1-year manufacturer warranty against defects