Omron CJ1M-CPU11 V4.0 Programmable Logic Controller CPU

The Omron CJ1M-CPU11 is a compact CPU unit for the CJ series of programmable logic controllers. It features 5k steps of program memory, a built-in power supply (24V DC), and a RS-232C port for programming and communication. The CPU supports high-speed pulse outputs (100 kHz) and a high-speed counter (100 kHz), making it suitable for small positioning applications and high-speed counting tasks. The V4.0 firmware version offers enhanced functionality and improved performance. The CJ1M-CPU11 is ideal for small to medium automation applications where space and cost are considerations.

Technical Specifications

Power supply: 24 V DC (20.4-26.4 V), consumption 0.5 A. Program memory: 5k steps (RAM, battery-backed). Instruction speed: 0.1 µs (basic). I/O points: built-in 4 inputs, 2 outputs (transistor sink). Built-in high-speed counter: 1 channel, 100 kHz. Built-in pulse outputs: 2 channels, 100 kHz. Communication: RS-232C (port A), optional RS-422/485 via CJ1W-SCU. Expansion: up to 2 CJ1W I/O modules (max 128 additional points). Dimensions: 90 mm (H) × 30 mm (W) × 85 mm (D). Weight: 0.2 kg. Operating temperature: 0°C to 55°C. Storage: -20°C to 75°C. Certifications: CE, UL, RoHS.

Key Features

• 5k steps program memory, 0.1 µs instruction speed

• Built-in 24V DC power supply

• 4 digital inputs, 2 transistor outputs

• 1 high-speed counter (100 kHz), 2 pulse outputs (100 kHz)

• RS-232C programming port

• Expandable with up to 2 CJ1W I/O modules

• Battery-backed RAM and real-time clock

• Compatible with CX-Programmer software

Built-in I/O and Motion Control

The CJ1M-CPU11 includes 4 digital inputs (24 V DC, 6 mA) and 2 transistor sink outputs (0.3 A). The built-in high-speed counter (100 kHz) can be used for encoder feedback or high-speed counting applications. The two pulse outputs (100 kHz) support positioning control for stepper or servo drives without additional modules. The CPU also includes a built-in RS-232C port (9-pin D-sub) for programming and communication with HMIs or other devices. The real-time clock is battery-backed for time-stamped events.

Programming and Software

The CJ1M-CPU11 is programmed using Omron CX-Programmer (part of CX-One). Languages include ladder logic, structured text, and function blocks. The CPU supports online editing, allowing program changes while the controller is running. The built-in RS-232C port can be used for direct connection to a PC via a CS1W-CN226 cable. The CPU supports function blocks and data types for structured programming.

Applications

The CJ1M-CPU11 is suitable for small packaging machines, positioning tables, conveyor control, and automated test equipment. The built-in pulse outputs allow direct connection to stepper drives without additional modules. Typical applications include cut-to-length control, pick-and-place, and indexing tables.

Installation and Wiring

Mount the CPU on a DIN rail. Connect 24V DC power to the L+ and L- terminals. Wire inputs to I0-I3 and common COM. Wire outputs to Q0-Q1 and common COM (0V). The RS-232C port connects to a PC for programming. Use a programming cable (CS1W-CN226). Expansion modules (optional) attach to the right side.

Maintenance and Diagnostics

LED indicators: POWER, RUN, ERROR, COMM, and input/output status. Use CX-Programmer to read the diagnostic buffer. The battery (CP1W-BAT01) retains program and clock; replace every 5 years.

Conclusion

The Omron CJ1M-CPU11 is a compact, powerful CPU with integrated I/O and motion control features. It is suitable for cost-sensitive applications requiring high-speed positioning and simple I/O.