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OMRON
​PLC Modules & Parts

Omron PLC families:
  • 1980s–1990s – CQM1, C200H (SYSMAC classic series)
    Typical use: legacy machines, long-running installations. Many models now discontinued / EOL.
  • 1990s–2000s – CS1 family
    Mid-range controllers that were a workhorse for many years; Omron has announced discontinuation for many CS1 parts (replacement guidance points to NX/CJ families). 
  • 2000s – CJ1 / CJ2 / CJ2M / CJ2H series
    Successors to CS1/C200H for many applications; many CJ variants continue to be supported but parts and specific modules have periodic discontinuation notices (check lifecycle). 
  • 2000s – CVM1 / CV series
    Older compact PLCs (now generally discontinued). 
  • Late 2000s – CP / CP1 / CP1E / CP1L (micro & compact PLCs)
    Very popular compact PLC family; many CP/CP1 variants remain active and are still sold by Omron / distributors. 
  • 2010s – NX / NJ / NX1 / NX7 (Machine Automation Controllers / modern Sysmac platform)
    Current Omron flagship platform for high-performance I/O, motion, safety and machine control — actively sold and updated. 
  • 2010s–2020s – NX-series & NJ (higher-end, integrated motion/PLC)
    Current, actively sold — recommended replacements for many discontinued CS1 / C200H use cases.
Omron C200 PLC (Legacy Series)
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Typical Uses
  • Widely used in the 1990s and early 2000s
  • Small to mid-size machine control
  • Packaging, assembly lines, and material handling
  • Applications where modular I/O expansion was needed
Key Features
  • Modular rack-based PLC (CPU + I/O units)
  • Various CPUs available depending on performance needs
  • Relay, transistor, and analog I/O modules supported
  • Communication options: RS-232, Host Link, SYSMAC LINK, and later Ethernet add-ons
  • Supported basic ladder programming via Omron’s SYSWIN or CX-Programmer
  • Expanded with Special I/O units (positioning, temperature control, etc.)
Example Part Numbers
  • CPU Units
    • C200H-CPU01 / C200H-CPU03 (standard CPUs)
    • C200HS-CPU01 / C200HS-CPU03 (high-speed CPUs with more memory)
    • C200HX / C200HG / C200HE (enhanced versions, faster scan, larger memory)
  • I/O Modules
    • C200H-ID212 (DC input module)
    • C200H-OD212 (DC output module)
    • C200H-AD003 (Analog input)
    • C200H-DA003 (Analog output)
  • Special Modules
    • C200H-PRM21 (Profibus master)
    • C200H-SCB21 (Serial Communication Board)
Physical Size
  • Rack-based modular design (backplane with power supply, CPU, and I/O cards)
  • Larger and bulkier compared to modern Omron CJ / CS / NX PLCs
Omron CQM1 PLC (Compact Modular Series)

Typical Uses
  • Introduced as a compact alternative to the larger C200 series
  • Used in small to medium-sized automation projects
  • Applications: packaging, conveyors, textile machines, assembly systems
  • Suitable for OEM machines needing compact yet expandable PLCs
Key Features
  • Compact modular design (smaller than C200H)
  • CPUs with integrated I/O (digital + analog depending on model)
  • Expandable via side-mounted modules
  • Supported special I/O units (positioning, temperature, comms)
  • Communication: RS-232, RS-422/485, Host Link, SYSMAC LINK (optional modules)
  • Programmed with SYSWIN or later CX-Programmer software
  • Memory options for user programs (RAM + EEPROM backup)
Example Part Numbers
  • CPU Units
    • CQM1-CPU11 (Basic CPU, 2K steps)
    • CQM1-CPU21 (Enhanced CPU, 4K steps)
    • CQM1-CPU41 (Advanced CPU, 7K steps, faster scan)
  • I/O Modules
    • CQM1-ID211 (DC Input module)
    • CQM1-OD213 (DC Output module)
    • CQM1-AD041 (Analog Input module)
    • CQM1-DA021 (Analog Output module)
  • Special Modules
    • CQM1-SCB41 (Serial Communication Board)
    • CQM1-PRM21 (Profibus master)
Physical Size
  • Very compact, smaller than C200H
  • DIN-rail or panel mount
  • Expansion modules slide to the right of CPU
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Omron C200H PLC (Legacy Modular Series)

Typical Uses
  • Popular in the 1990s and early 2000s for factory automation
  • Used in medium-sized machines and production lines
  • Packaging, assembly, automotive, and material handling systems
  • Suitable for applications needing expandable modular control
Key Features
  • Rack-based modular design (CPU + power supply + I/O modules)
  • Wide range of CPUs (basic to enhanced performance)
  • Digital, analog, and special I/O modules available
  • Communication options: RS-232, Host Link, SYSMAC LINK, Ethernet (optional)
  • Programming via SYSWIN or CX-Programmer software
  • Supported specialty units: motion, positioning, temperature control, networking
  • Long service life and widely used despite being discontinued
Example Part Numbers
  • CPU Units
    • C200H-CPU01 / C200H-CPU03 (basic CPUs)
    • C200HS-CPU01 / CPU03 (high-speed CPUs with more memory)
    • C200HX, C200HG, C200HE (enhanced versions, higher performance)
  • I/O Modules
    • C200H-ID212 (DC input module)
    • C200H-OD212 (DC output module)
    • C200H-AD003 (Analog input)
    • C200H-DA003 (Analog output)
  • Special Modules
    • C200H-PRM21 (Profibus Master)
    • C200H-SCB21 (Serial Communication Board)
    • C200H-NC112 (Position Control Unit)
Physical Size
  • Rack-mounted system with power supply, CPU, and modules
  • Larger and bulkier than later PLCs like CQM1 or CJ series
Omron CS1 Series PLC (Modular High-End Platform)

Typical Uses
  • Large-scale factory automation and process control
  • Widely used in automotive, chemical, food & beverage, packaging, and power plants
  • Applications requiring high reliability, redundancy, and networking
  • Suitable for complex, distributed, and mission-critical control systems
Key Features
  • Modular rack-based PLC (CPU + power supply + I/O racks)
  • Multiple CPU types available:
    • CS1G → Standard CPUs for medium applications
    • CS1H → High-performance CPUs with faster scan speeds and larger memory
    • CS1D → Duplex/redundant CPUs for high-availability systems
  • Supports up to 10,000 I/O points (depending on configuration)
  • Wide range of I/O: digital, analog, temperature, motion, positioning, and special modules
  • Communication: Ethernet/IP, DeviceNet, Profibus, Controller Link, Host Link, RS-232/485
  • Large program and data memory capacity
  • Advanced features: floating-point operations, PID loops, redundancy support
  • Programmed via CX-Programmer software (part of Omron CX-One suite)
Example Part Numbers
  • CPU Units
    • CS1G-CPU42H (standard CPU)
    • CS1H-CPU65H (high-performance CPU)
    • CS1D-CPU67HA (duplex redundant CPU)
  • Power Supply Units
    • CS1W-PA204R (AC power supply)
    • CS1W-PD025 (DC power supply)
  • I/O Modules
    • CS1W-ID211 (DC input module)
    • CS1W-OD211 (DC output module)
    • CS1W-AD081-V1 (Analog input module)
    • CS1W-DA08V (Analog output module)
  • Specialty Modules
    • CS1W-ETN21 (Ethernet unit)
    • CS1W-SCB21 (Serial Communication board)
    • CS1W-NC113 (Position control module)
Physical Size
  • Rack-mounted modular PLC
  • Larger than CJ series, designed for high I/O density and scalability
  • Multiple racks can be interconnected with expansion cables
Omron CJ2 Series PLC (Advanced Modular Mid-Range PLC)

Typical Uses
  • Successor to the CJ1 series
  • Ideal for medium to large-scale machine and process automation
  • Common in automotive, packaging, material handling, and food industries
  • Applications needing fast processing and strong networking
Key Features
  • Modular, rack-less PLC (compact footprint, modules connect side by side)
  • Multiple CPU options:
    • CJ2M → Mid-range CPUs, built-in Ethernet, motion control support
    • CJ2H → High-speed CPUs for large programs and advanced applications
  • Faster scan speeds and expanded memory compared to CJ1
  • Built-in Ethernet/IP on many CPU models
  • Supports up to 40,000 I/O points (with expansion)
  • Wide variety of I/O: digital, analog, temperature, motion, positioning, and networking
  • Full compatibility with CX-Programmer software (CX-One suite)
  • Advanced instructions: string handling, floating point, PID, data logging
  • Expandable with CJ1W and CJ2W modules
Example Part Numbers
  • CPU Units
    • CJ2M-CPU31 (mid-range CPU with Ethernet)
    • CJ2M-CPU35 (higher performance CPU)
    • CJ2H-CPU64-EIP (high-speed CPU with built-in Ethernet/IP)
    • CJ2H-CPU68-EIP (top-tier high-speed CPU with large memory)
  • I/O Modules
    • CJ1W-ID211 (DC input module)
    • CJ1W-OD212 (DC output module)
    • CJ1W-AD081-V1 (Analog input)
    • CJ1W-DA08V (Analog output)
  • Specialty Modules
    • CJ1W-ETN21 (Ethernet module)
    • CJ1W-NC213 (Position control unit)
    • CJ1W-SCU31 (Serial communication unit)
Physical Size
  • Compact modular PLC
  • Modules connect directly without backplane racks (saves space)
  • DIN-rail mounted
  • Smaller than CS1 series but scalable for large applications
Omron CP Series PLC (Compact Mid-Range PLCs)

Typical Uses
  • Stand-alone machine control (packaging, labeling, conveyors, presses)
  • Small to medium factory automation systems
  • Building automation and HVAC systems
  • Applications needing built-in communication and limited modular expansion
Key Features
  • Compact all-in-one design with CPU, power supply, and I/O in one unit
  • Some models support modular expansion (extra I/O, analog, communication modules)
  • High-speed processing suitable for motion and positioning tasks
  • Built-in Ethernet, USB, or serial ports depending on model
  • Data logging and memory card support (on higher models)
  • Programming via CX-Programmer software (part of CX-One suite)
Sub-Families and Example Part Numbers
CP1E Series (Entry-level, cost-effective)
• CP1E-E30DR-A → 30 I/O, relay outputs, AC power
• CP1E-N40DR-D → 40 I/O, transistor outputs, DC power
CP1L Series (Compact, expandable)
• CP1L-M30DT1-D → 30 I/O, transistor outputs
• CP1L-EM40DT-D → 40 I/O, with Ethernet built-in
CP1H Series (High-speed, advanced functions)
• CP1H-X40DR-A → 40 I/O, relay outputs
• CP1H-XA40DT-D → 40 I/O, with 4 analog inputs and 2 analog outputs built-in
CP2E Series (Next-generation compact PLC)
• CP2E-N30DT-D → 30 I/O, transistor outputs, DC power
• CP2E-S40DT-A → 40 I/O, relay outputs, AC power
Physical Size
  • Small, DIN-rail mountable units
  • Slightly larger than Micro PLCs, but smaller than CJ2/CS1 series
  • Expansion modules snap onto the side (for CP1L, CP1H, CP2E)​
Omron Sysmac Platform (Next-Generation Automation Platform)

Typical Uses
  • Advanced machine automation
  • High-speed motion control (multi-axis, robotics, CNC)
  • Integrated safety control
  • Vision inspection and quality monitoring
  • High-end packaging, automotive, electronics, food & beverage machinery
  • Smart factory and Industry 4.0 applications
Key Features
  • Machine Automation Controllers (MACs) with real-time deterministic control
  • Integrated logic + motion + safety + vision + robotics in one CPU
  • High-speed EtherCAT network for motion and I/O
  • Built-in EtherNet/IP for plant-level communication
  • Programming with Sysmac Studio (IEC 61131-3 languages + motion, safety, robotics, vision configuration)
  • Data collection and analytics for IIoT/Industry 4.0
  • Safety integrated (Functional Safety over EtherCAT, FSoE)
  • Supports robotics: delta robots, SCARA, and articulated robots
Example Part Numbers
  • Controllers
    • NJ101-1000 (Entry-level logic controller)
    • NJ301-1100 (Logic + motion control, EtherCAT master)
    • NJ501-1300 (High-end with robotics and advanced motion)
    • NX701-1600 (Flagship controller, ultra-high speed, up to 256 axes)
  • I/O & Safety Modules
    • NX-I/O series (EtherCAT distributed I/O)
    • NX-SL3300 (Safety CPU for functional safety applications)
  • Networking & Motion
    • G5 Series Servo Drives (EtherCAT)
    • NX-ECC203 (EtherCAT Coupler)
Physical Size
  • Compact modular form factor (rack-less, NX-series modules plug in side-by-side)
  • DIN-rail mountable
  • Scalable from small to very large applications
Omron NX Series (High-Performance Modular PLC)

Typical Uses
  • High-speed motion control systems
  • Complex machines with multi-axis synchronization
  • Integrated safety control (FSoE – Functional Safety over EtherCAT)
  • Robotics and vision-based automation
  • Packaging, assembly, automotive, and electronics industries
  • Smart factory & IIoT connectivity
Key Features
  • Scalable modular PLC platform (rack-less, DIN-rail mount)
  • High-speed EtherCAT network for motion and I/O
  • Built-in EtherNet/IP for plant-level communication
  • Deterministic cycle times as low as 125 µs
  • Integrated Safety Controllers (NX-SL series)
  • Hot-swap I/O modules for minimal downtime
  • Advanced diagnostics and traceability
  • Seamless programming in Sysmac Studio
Example Part Numbers
  • CPU / Controllers
    • NX1P2-9020DT1 (Logic controller with EtherCAT + EtherNet/IP)
    • NX1P2-1140DT1 (Higher I/O capacity, motion control)
    • NX701-1600 (Flagship machine automation controller, up to 256 axes)
  • I/O & Safety Modules
    • NX-ID5442 (Digital Input Module, 16-point)
    • NX-OD5256 (Digital Output Module, 16-point)
    • NX-SL3300 (Safety CPU Unit, FSoE-enabled)
Physical Size
  • Compact, modular units
  • Slim plug-in I/O modules, saving panel space
  • DIN-rail mounted, easy to expand with additional modules
Omron NJ Series PLC Overview
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Typical Uses
  • Advanced machine control combining logic, motion, safety, and vision capabilities
  • Robotics and synchronized multi-axis motion systems
  • High-end manufacturing such as semiconductor, automotive, electronics, packaging, etc.
  • Applications demanding high speed, precision, and integrated functionality
Key Features
  • Built-on the Sysmac platform — Omron’s unified automation environment
  • Integrated support for EtherCAT (for motion, I/O, etc.) and EtherNet/IP (for plant communication) 
  • High motion axis count depending on model (e.g. up to 64 axes) 
  • Very fast cycle times (e.g. ~0.5 ms in NJ5) 
  • Database connectivity: direct connection to SQL-type databases (Oracle, Microsoft SQL, etc.) for logging, production data etc. 
  • Some models include CNC / “NC-integrated” functionality for numerical control and G-code execution, reducing need for separate NC controllers 
Example Part Numbers / Models
  • NJ101-1000 / NJ101-1020 (lower-end NJ CPU units) 
  • NJ301 series (mid-performance models) 
  • NJ501-5300 (flagship high-performance model with motion, NC, high memory) 
Physical & Technical Specs (typical)
  • CPU units often about 90 × 90 × 90 mm panel-mount size.
  • Local I/O capacity: up to 2,560 points; with expansion (e.g. using NX I/O), far more.
  • Memory: program memory around 20 MB in high models like NJ501; variable memory in megabytes. 
  • Cycle time: models like NJ5 achieve ~0.5 ms for standard tasks.