Configured for high-speed sequence processing and analog PID loop execution in Omron CJ1 Automation Systems, the Omron CJ1G-CPU44P (CJ1G-CPU44P Loop-Control CPU Unit) provides direct physical/electrical execution.

Processing Architecture & Engine Allocation

The CJ1G-CPU44P integrates a dedicated process loop coprocessor alongside the primary ladder execution engine within a standard single-slot CJ-series form factor. The designation "CJ1G" references the high-speed backplane processing tier, while the "P" suffix identifies embedded process controller capabilities that run up to 300 function blocks. The "44" memory configuration provides 30 Ksteps of sequence memory and 64 Kwords of system data memory (DM: 32 Kwords, EM: 32 Kwords x 1 bank), enabling control of up to 1280 local I/O points across expanded backplane assemblies.

Hardware Operating Limits

Deterministic Bus Execution & Firmware Mapping

The processor maintains synchronous cyclic updates across the internal CJ-series backplane bus communication velocity framework. Operating with full firmware flash compatibility for CX-Process and CX-Programmer tools, the coprocessor handles continuous analog feedback calculations while simultaneously managing packet delivery across EtherNet/IP deterministic networks without expanding the sequence scan cycle time.

Factory Supply Components

• 1 x Omron CJ1G-CPU44P Processing Module
• 1 x Bus Interface Terminal Protection Cap Set
• 1 x Hardware Setup Leaflet

Field Assembly & Electrical Grounding Rules

• Cabinet Mounting & Thermal Spacing

  Snap the unit onto a standard 35 mm DIN rail inside a protective panel enclosure. Secure both end boundaries with mechanical end plates to eliminate axial movement along the rail. Maintain a minimum clearance of 50 mm above and below the housing for unassisted air convection.

• Earthing & Field Cabling Layout

  Connect the functional earth (FE) terminal on the adjacent power supply module to an isolated ground copper busbar with resistance under 100 ohms. Keep analog loop instrumentation wiring routed in separate grounded metallic conduits away from 230 VAC mains wiring and drive output cables.

Electrical & Mechanical Field Support

• What is the 5 VDC bus power requirement for the CJ1G-CPU44P?

  The module draws 0.95 A from the 5 VDC internal backplane power line supplied directly by the adjacent CJ-series power module.

• Can this loop-control CPU module be hot-swapped during active system operations?

  No, live insertion or removal is not supported. Operating power to the system power supply module must be disconnected before service.

• What maximum local I/O capacity can be addressed by this hardware version?

  The CPU directly handles up to 1280 local digital and analog I/O points across the CPU rack and connected CJ-series expansion racks.

• How many process function blocks can be executed by the internal process engine?

  The internal coprocessor processes up to 300 concurrent function blocks for PID loops, cascade routines, and signal conversion.

• What is the internal user data memory allocation?

  The module contains 64 Kwords total, arranged as 32 Kwords of standard DM registers and 32 Kwords of EM registers across 1 bank.

• How does the unit maintain program logic and memory registers during supply loss?

  An onboard lithium battery powers the internal RAM, system clock, and non-volatile DM registers during complete system power loss.

• What physical ports are available for logic download and firmware connection?

  System logic transfers through the built-in peripheral port, an optional serial communications board, or via the front CompactFlash card slot.

• What ambient environmental limits apply to continuous panel operation?

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