Omron CJ1H-CPU66H CJ1M/H Series CPU Unit

Description

The Omron CJ1H-CPU66H is a high-performance central processing unit designed for the CJ1 series programmable controller platform. It serves as the core intelligence of the automation system, executing control logic, managing I/O memory allocation, and coordinating peripheral communications. The unit features built-in peripheral and RS-232C ports, with extended networking capability via specialized communication modules. It is engineered for high-speed machine control and process automation applications within diverse industrial environments. The CPU maintains seamless compatibility with standard CJ-series I/O, specialized function units, and power supply modules.

Features

• High-speed program execution and instruction processing.
• Large memory capacity for extensive user programs and data logging.
• Built-in RS-232C port and peripheral port for programming and serial interfacing.
• Support for CJ-series high-speed data bus networks and backplane expansions.
• Flash memory backup for user programs and parameter files without battery dependence.
• Advanced debugging and diagnostic tools via CX-Programmer software.
• Compact, slotless design optimizing control panel space.

Applications

• High-speed packaging and labeling machinery.
• Multi-axis motion control and positioning systems.
• Semiconductor manufacturing equipment.
• Food and beverage processing lines.
• Automotive assembly and welding cells.
• Water treatment and environmental control monitoring.

Technical Specifications

Performance and Memory

Communication

Electrical and Environmental

Connections / Interfaces

Installation Guidelines

• Backplane Mounting: Securely latch the CPU unit onto the CJ-series power supply module and adjacent I/O units using the built-in sliders. Ensure the DIN rail track is level.
• Grounding: Connect a functional ground wire ($2\text{ mm}^2$ minimum) to the functional ground terminal on the associated power supply module. Keep the grounding line as short as possible.
• Wiring Polarity: Double-check external power supply terminals before powering the rack to prevent backplane damage.
• Cooling and Ventilation: Maintain a minimum clearance of 20 mm above and below the CPU unit assembly to allow natural convection airflow.
• Cable Routing: Route communication cables (RS-232C, peripheral) away from high-voltage motor lines and AC power cables to prevent electromagnetic interference.

FAQ

• What software is required to program this CPU unit?
• CX-Programmer, which is part of the integrated CX-One automation software suite.
• Can the program memory be retained without a battery?
• User programs and system parameters are stored in non-volatile flash memory. The battery is used to back up the clock and data memory (DM/EM areas).
• What is the maximum number of local expansion racks supported?
• Up to 3 expansion racks can be connected to the CPU rack.
• Does this unit support direct Ethernet connectivity on the CPU board?
• No, this model does not have a built-in Ethernet port. Network communication requires a dedicated Ethernet module (e.g., CJ1W-ETN21).
• What is the purpose of the built-in RS-232C port?
• It is used for connecting to operator interfaces (HMIs), host computers, modems, or external serial devices using Host Link or No-protocol modes.
• What type of memory card can be inserted into the CPU?
• Standard CompactFlash (CF) cards approved by Omron for industrial data logging and backup.
• Can I replace this unit while the system is powered on?
• No, the control system power supply must be completely turned off before removing or inserting the CPU unit.
• What is the maximum I/O point capacity?
• It can handle up to 2,560 local and expansion I/O points.
• What does the "H" signify in the model suffix?
• The "H" indicates high-speed processing capabilities compared to standard CJ1M versions.
• How do I troubleshoot a flashing "ERR" LED?
• Connect with CX-Programmer to read the specific error logs and system flags to determine if it is a configuration, hardware, or program error.