Configured for high-density program execution and expanded register processing in Omron CJ1 systems, the Omron CJ1G-CPU44H (CJ1G-CPU44H CPU Unit) provides direct physical/electrical execution.

Memory Allocation & Model Designation

The model number CJ1G-CPU44H specifies a high-speed central processing unit within the Omron CJ1 controller architecture. The base designation "CJ1G" indicates high-performance ladder processing capabilities. The suffix "-CPU44H" identifies an expanded memory allocation featuring 30 Ksteps of program capacity alongside 64 Kwords of system data memory (DM: 32 Kwords, EM: 32 Kwords x 1 bank), engineered for expanded I/O density scaling up to 1280 local points.

System Operating Parameters

Backplane Synchronization & Network Protocol Routing

The CPU manages high-speed cyclic I/O scans across the internal CJ-series backplane bus communication velocity framework. Maintaining strict firmware flash compatibility with CX-Programmer tools, the unit facilitates real-time data frame transmission across Profinet / EtherNet/IP deterministic networks without introducing scan-time delays during large memory array operations.

Standard Package Contents

• 1 x Omron CJ1G-CPU44H Central Processing Unit
• 1 x Peripheral Bus Connector Protection Cover
• 1 x Product Reference & Installation Sheet

Mechanical Mounting & Field Wiring Rules

• DIN-Rail Securement & Convection Gaps

  Install the CPU unit directly onto a rigid 35 mm DIN rail inside a protective control enclosure. Lock the CPU assembly in place using end brackets on both flanks. Maintain a vertical distance of at least 50 mm above and below the housing to facilitate passive convection cooling.

• Grounding Practices & Signal Isolation

  Ground the functional earth (FE) terminal on the adjacent power supply block using a dedicated lead with ground resistance below 100 ohms. Separate CPU communication lines from 230 VAC power conduits and motor drive leads to avoid electromagnetic interference.

Hardware Technical Knowledgebase

• What is the electrical current demand from the internal 5 VDC backplane rail?

  The CJ1G-CPU44H draws 0.91 A at 5 VDC directly from the system power supply module across the internal backplane bus.

• Can the CPU unit be inserted or extracted while rack power is energized?

  No, hot-swapping is strictly prohibited. Mains supply to the rack power module must be disconnected before installation or removal.

• What maximum discrete I/O count does this processor support locally?

  The CPU addresses up to 1280 local I/O points distributed across the main rack and connected CJ-series expansion racks.

• How is the internal memory partitioned for program and register storage?

  The processor provides 30 Ksteps of program memory alongside 64 Kwords of data memory (32 Kwords DM and 32 Kwords EM x 1 bank).

• How are active program files and memory values retained during power failures?

  An onboard replaceable lithium battery maintains the internal user RAM, clock variables, and non-volatile DM locations during outages.

• What interface connections are available for logic loading and diagnostic tools?

  Programs transfer via the integrated peripheral port, optional serial board, or directly through the front-panel CompactFlash slot.

• What are the allowable operating ambient temperatures for panel mounting?

  The module operates within an ambient temperature boundary of 0 to 55 deg C with relative humidity between 10% and 90% non-condensing.

• Does the processor support external storage media for data log retention?

  Yes, the front panel incorporates a CompactFlash card slot for parameter transfers, memory backups, and user data logging.