Omron CJ1G-CPU43H PLC CPU – 64K Words, RS-232C, Battery Backup, DIN Rail

The Omron CJ1G-CPU43H is a high-performance modular PLC CPU unit from the CJ1G series, engineered for scalable automation systems with demanding logic and memory requirements. With a 64K-word user program capacity and RS-232C communication, it supports up to 30 I/O modules across 2 expansion racks, making it ideal for mid-to-large scale applications in manufacturing, packaging, and process automation.

Although the CJ1G-CPU43H is now classified as obsolete, it remains widely used in legacy systems where reliability and CJ1 series compatibility are critical. It features battery backup for memory retention and is programmed using CX-One software.

CPU & Memory Specifications

Model: CJ1GCPU43H
Series: CJ1G
CPU Type: Modular PLC CPU
Program Memory Capacity: 64K words
Data Memory: Internal SRAM (battery-backed)
Program Language Support: Ladder Logic, SFC, ST (via CX-One)
Display Type: None
Battery Backup: Yes (internal battery for memory retention)

Communication & I/O

• Built-in Serial Communication:
  • 1 × RS-232C port (D-sub 9-pin)
• Expansion Capability:
  • Supports up to 30 modules
  • Max 2 I/O expansion racks
• Number of Inputs/Outputs:
  • None onboard (modular architecture)
  • Supports both digital and analog I/O via expansion modules

Electrical & Mounting

• Supply Voltage: Provided via CJ1 power supply unit (sold separately)
• Mounting Type: DIN rail (via CJ-series base rack)
• Power Consumption: Dependent on connected modules

Environmental Ratings

• Operating Temperature: 0°C to 55°C
• Storage Temperature: –20°C to 75°C
• Humidity Range: 10% to 90% RH (non-condensing)
• Ingress Protection: Not specified
• Shock Resistance: IEC 60068-2-27 compliant
• Vibration Resistance: IEC 60068-2-6 compliant

System Integration

• Software: CX-One (includes CX-Programmer)
• PLC Series Compatibility: CJ1G, CJ1M, CJ2 family (with limitations)
• Modular Support: Up to 30 I/O modules (including special I/O and CPU bus units)
• I/O Bus System: CJ I/O Bus
• Approvals: Not specified (model is obsolete)

Mechanical Specifications

• Product Dimensions: Standard CJ1G CPU unit size (refer to datasheet)
• Weight: 5.0 kg (including full configuration and packaging)

Applications

Ideal for (Legacy Systems):

• Automotive production lines
• Packaging machines
• Material handling systems
• Distributed industrial control
• Upgrade-restricted OEM machinery

Key Features & Benefits

✅ Large Memory: 64K words for complex program logic.

✅ Modular Expansion: Supports up to 30 modules for scalable system design.

✅ Legacy Compatibility: Built to work with CJ1 series architecture.

✅ Battery Backup: Protects programs and data during power loss.

✅ Flexible Integration: Communicates via RS-232C to HMIs, SCADA, and barcode readers.

📦 Available from Drive Outlet Megastore

The Omron CJ1G-CPU43H is officially obsolete and no longer in production. It remains supported in existing installations and may be available from aftermarket suppliers or stockists.

Contact Drive Outlet Megastore to check availability or explore suitable replacements.

Legacy performance. Lasting reliability. Only at Drive Outlet.