Configured for high-speed program execution and data memory handling in Omron CJ1 systems, the Omron CJ1G-CPU42H (CJ1G-CPU42H CPU Unit) provides direct physical/electrical execution.

Model Nomenclature & Functional Variant

The CJ1G-CPU42H belongs to the Omron CJ1G high-speed CPU family. The base designation "CJ1G" indicates high-performance processing capabilities within the small-form-factor CJ-series architecture. The suffix "-CPU42H" specifies the memory footprint configuration (10 Ksteps program capacity, 64 Kwords total Data Memory) and internal bus timing profiles optimized for complex sequence control and data log management.

Technical Performance Matrix

Deterministic System Integration & Bus Execution

The unit communicates across the internal CJ-series backplane bus communication velocity profile to execute instruction processing without execution lag. The hardware interface maintains firmware flash compatibility with Omron CX-Programmer tools, supporting continuous backplane refresh sequences and deterministic network synchronization over EtherNet/IP and Controller Link modules.

Ordering & Package Verification

• 1 x Omron CJ1G-CPU42H Central Processing Unit

• 1 x Set of Terminal Block Protective Covers

• 1 x Hardware Instruction Sheet

Physical Installation & Cabling Specifications

• DIN-Rail Mounting & Mechanical Clearance

  Mount the unit vertically onto a standard 35 mm DIN rail. Secure the assembly using end plates on both sides to prevent lateral movement along the rail. Maintain a minimum top and bottom vertical clearance of 50 mm for heat convection.

• Backplane Grounding & Wiring Safety

  Connect the functional ground (FG) terminal of the adjacent power supply unit directly to a dedicated earth ground (less than 100 ohms). Ensure all wiring runs stay segregated from high-voltage power lines to prevent EMI interference.

Technical Inquiry Knowledgebase

• What is the 5 VDC backplane current draw for the CJ1G-CPU42H processor?

  The module consumes 0.91 A from the 5 VDC internal backplane bus supplied by the system power supply module.

• Can the CJ1G-CPU42H unit be installed or removed under active rack power?

  No, active hot-swapping of the CPU unit is prohibited. The system power supply must be powered off before removal.

• What is the maximum local hardware I/O point expansion capacity?

  The processor directly controls up to 960 local I/O points when configured with compatible CJ-series expansion racks.

• What memory structure is available for system user data storage?

  It features 64 Kwords of Data Memory split into 32 Kwords of standard DM and 32 Kwords of EM across 1 bank.

• Is the internal CPU memory backed up against power degradation?

  Yes, system parameters and standard DM areas are preserved using an internal lithium battery during power loss.

• What environment constraints apply to the physical operating area?

  Operate within ambient temperatures of 0 to 55 deg C and non-condensing relative humidity levels from 10% to 90%.

• How is user program code loaded into the execution memory?

  Programs transfer via the built-in peripheral port or serial communications board using CX-Programmer software.

• Does the processor support external memory card storage?

  Yes, the front panel includes a CompactFlash card slot for memory backup, log retention, and recipe loading.