ALLEN BRADLEY 1785-L40E PLC 1785L40E

The Allen Bradley 1785-L40E is a PLC-5/40E processor module, designed for high-performance industrial automation applications. This Ethernet-capable PLC is ideal for large-scale process control, offering advanced networking, high-speed processing, and reliable data handling for demanding industrial environments.

Technical Specifications

  • Manufacturer: Allen Bradley (Rockwell Automation)
  • Model: 1785-L40E
  • Series: PLC-5/40E
  • Processing Speed: 0.6 ms per typical Boolean instruction
  • User Memory: 48K words
  • I/O Capacity: Up to 2048 discrete I/O points
  • Communication Interfaces:
    • Ethernet (10 Mbps, TCP/IP) for remote programming and data exchange
    • RS-232 Serial Port for programming and device integration
    • Remote I/O (RIO) for distributed I/O control
    • Data Highway Plus (DH+) for legacy system compatibility
  • Backplane Current Draw: 2.5 A at 5V DC
  • Power Supply Compatibility: 1771 Series Power Supplies
  • Programming Software: RSLogix 5
  • Operating Temperature: 0°C to 60°C (32°F to 140°F)

Key Features

  • Integrated Ethernet communication for high-speed data exchange and remote monitoring
  • Supports up to 2048 I/O points, making it suitable for complex control systems
  • Large 48K word user memory for advanced program execution and data logging
  • High-speed processing ensures rapid response times for critical automation tasks
  • Supports Remote I/O (RIO) and DH+ networks for seamless legacy system integration
  • Modular design allows for easy system expansion within 1771 I/O chassis

Compatible Allen Bradley Components

  • Allen Bradley 1771 I/O Modules for expanded control capabilities
  • Allen Bradley PLC-5 Power Supplies (1771 Series)
  • FactoryTalk View SCADA for real-time monitoring and visualization
  • RSLogix 5 for PLC programming and diagnostics

Industry Applications

  • Manufacturing automation and assembly lines
  • Material handling and conveyor control systems
  • Power generation and utility automation
  • Food and beverage processing plants
  • Oil, gas, and petrochemical control systems
  • Water and wastewater treatment facilities

Installation & Operational Notes

  • Installs in a standard 1771 I/O chassis, providing seamless integration with existing systems
  • Requires a compatible power supply to ensure stable operation
  • Ethernet capability allows remote programming, monitoring, and troubleshooting
  • RSLogix 5 software required for programming and configuration
  • Regular firmware updates recommended for improved performance and security

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