The Omron CJ2H-CPU65, also cataloged as the CJ2H-CPU65 Programmable Logic Controller, operates as a dedicated hardware component for high-speed sequence processing and high-density I/O control within Omron SYSMAC CJ2 platforms.

Technical Identifier Matrix

• Base Hardware Model: CJ2H-CPU65
• Full Part Number: CJ2H-CPU65
• Product Type: Central Processing Unit (CPU)
• Series Family: Omron SYSMAC CJ2 Series
• Unit Classification: High-Speed CPU Unit
• Program Capacity: 100K steps
• I/O Capacity: 2560 bits

Hardware Specifications

Omron Backplane Bus Velocity & Real-Time Logic Execution

The CJ2H-CPU65 provides direct physical execution of high-speed program cycles across the CJ Series backplane. With a basic instruction execution speed down to 0.016 us and an overhead processing time of 100 us, the processor maintains high-speed backplane bus velocity and deterministic logic scan performance. Firmware routines and I/O refreshing operate with tight timing synchronization, preventing logic scan jitter during dense function block processing and complex memory register operations.

Package Contents & Ordering Information

• 1x Omron CJ2H-CPU65 CPU Unit
• 1x Battery unit (CJ1W-BAT01 pre-installed or included)
• 1x Hardware instruction sheet

Field Installation Guidelines

• Rack Mounting: Securely mount the processor directly onto the CJ Series rack backplane, locking the upper and lower slider mechanisms until engaged.
• Panel Enclosure Requirements: Install inside an IP54 or NEMA Type 12 protective steel enclosure to prevent dust and airborne conductive contaminants.
• Serial Cable Shielding: Maintain 360-deg braid shielding around point-to-point RS-232C serial links, ensuring line lengths remain strictly within 15 m.
• Chassis Grounding: Connect the power supply unit Ground (GR) terminal to an earth ground bus maintaining an electrical resistance under 100 Ohms.

Frequently Asked Questions

• Is hot-swapping supported for the CJ2H-CPU65 on an active CJ rack backplane?

  No. Main system power must be completely disconnected before removing or inserting the processor to avoid electrical damage.

• What is the total current consumption requirement from the 5 VDC backplane bus?

  The unit consumes a nominal supply current of 0.42 A at 5 VDC directly from the internal backplane power supply rail.

• What memory card capacities can be used with the CJ2H-CPU65 front slot?

  The module supports industrial CompactFlash memory cards with storage capacities of 128 MB, 256 MB, or 512 MB.

• What instruction execution speed does the internal processor core achieve?

  Basic ladder logic instructions execute at a minimum speed of 0.016 us, while special instructions execute from 0.048 us min.

• How many Function Block definitions and instances are supported in memory?

  The memory structure permits a maximum of 2048 Function Block definitions and up to 2048 active program instances.

• What serial communications parameters apply to the built-in peripheral/RS-232C port?

  The port operates in start-stop, half-duplex mode with configurable baud rates ranging from 0.3 kbps up to 115.2 kbps.

• What EM Area memory banks can be targeted for force-setting and force-resetting?

  Force-setting and force-resetting are supported across EM Area Banks 0 through 3 hex (Bank 3 hex for automatic allocation).

• What ground path impedance must be verified for the system ground connection?

  The grounding system must maintain a total loop resistance under 100 Ohms to the main enclosure earth bus bar.