Configured for high-speed logic execution and multi-axis control tasks in SYSMAC CJ Series platforms, the Omron CJ1H-CPU66H (CJ1H-CPU66H Programmable Controller CPU Unit) provides direct physical/electrical execution.

Technical Identifier Matrix

• Brand: Omron
• Base Model: CJ1H-CPU66H
• Full Part Number: CJ1H-CPU66H
• Series Name: SYSMAC CJ Series
• Product Type: Programmable Controller CPU Unit
• Unit Classification: High-speed CJ1H CPU Unit

Hardware Specifications

PLC Controller Processing & Backplane Communication

The CJ1H-CPU66H executes ladder logic and structured text via high-speed backplane bus velocity channels, maintaining cyclic execution times with a basic instruction processing speed of 0.02 us. Utilizing optimized memory mapping, the CPU manages up to 2,560 local I/O points while driving synchronized data exchanges across Special I/O and CPU Bus units. The internal architecture balances Profinet/EtherNet/IP determinism across connected communication interfaces, preserving I/O density scaling efficiency and ensuring firmware flash compatibility for high-density, multi-rack PLC expansions.

Package Contents & Ordering Information

• 1x Omron CJ1H-CPU66H CPU Unit
• 1x End Cover (CJ1W-TER01)
• 1x Built-in Lithium Battery

Field Installation Guidelines

• Mounting: Snap the CPU unit onto the left-most position of the CJ-series CPU rack rail, ensuring side connectors engage fully, and lock the rail sliders into position.
• Wiring: Connect serial communication cables to the front D-sub 9-pin RS-232C port or dedicated peripheral port using shielded industrial cabling.
• Shielding: Terminate serial network cable shields using 360-deg braid shielding bonded directly to the panel functional earth (FE) ground bus bar.
• Grounding: Run a low-impedance copper conductor from the power supply unit FE terminal directly to the enclosure main protective earth (PE) point.

Frequently Asked Questions

• What is the program execution capacity of the CJ1H-CPU66H unit?

  The CJ1H-CPU66H provides a memory program capacity of 250k steps (1,024 KB) and a data memory capacity of 448k words.

• What basic instruction execution speed is achieved by this processor?

  The CPU executes standard basic logic instructions in 0.02 us and special instructions in 0.04 us.

• What maximum number of local I/O points can be addressed by the CPU?

  The CPU handles up to 2,560 local I/O points across a maximum of 40 units spanning up to 3 expansion racks.

• What physical dimensions apply to the CJ1H-CPU66H processor hardware?

  The hardware physical dimensions measure 3.1 cm x 9.0 cm x 6.5 cm with an overall unit weight of 0.19 kg max.

• What internal backplane current load does the CJ1H-CPU66H draw?

  The processor draws 820 mA max. at 5 VDC (4.10 W total power consumption) from the system rack power supply unit.

• What communication interface ports are built directly onto the front panel?

  The module features one RS-232C port (D-sub 9-pin female connection) and one peripheral port for programming tool connection.

• Does the CPU unit support hot-swapping on the CJ backplane bus?

  No, the CJ-series backplane does not support hot-swapping; power to the rack must be disconnected before replacing the CPU.

• What removable memory storage media is supported by the processor chassis?

  The unit incorporates a built-in CompactFlash memory card slot for program backup, data logging, and parameter storage.