Allen Bradley 1785V40L Controller

The Allen-Bradley 1785-V40L is a PLC-5/V40L VME Controller, designed for high-performance industrial automation and process control applications. This PLC-5 processor integrates into VMEbus-based control systems, providing advanced logic execution, real-time data processing, and reliable I/O communication for distributed industrial environments.

Technical Specifications

  • Manufacturer: Allen-Bradley (Rockwell Automation)
  • Model: 1785-V40L
  • Controller Type: PLC-5/V40L VME Processor
  • Memory Capacity: 48K Words SRAM (Battery-Backed)
  • Communication Ports:
    • 1 DH+ (Data Highway Plus) Port
    • 1 Local I/O Port
  • I/O Capacity:
    • 512 Digital Inputs and 512 Digital Outputs
    • 128K Total I/O (scalable with remote chassis expansion)
  • Programming Software: RSLogix 5
  • Communication Protocols:
    • EtherNet/IP (via bridge modules)
    • ControlNet and DeviceNet compatibility
    • Data Highway Plus (DH+) for peer-to-peer networking
  • Backplane Current Load: 1.2A at 5V DC
  • Mounting Type: VMEbus rack-mounted
  • Operating Temperature Range: 0°C to 60°C (32°F to 140°F)
  • Certifications: UL, CE, CSA approved for industrial automation applications

Key Features

  • 48K Word SRAM memory for program storage and execution
  • Designed for VMEbus systems for high-speed control applications
  • Supports large-scale I/O expansion for complex automation needs
  • Data Highway Plus (DH+) port for networking multiple PLCs
  • Local I/O port for direct control of Allen-Bradley 1771 I/O modules
  • Reliable and scalable for industrial process control applications

Compatible Allen-Bradley Components

  • Allen-Bradley 1771 I/O Modules (Digital and Analog)
  • Allen-Bradley 1785 Series PLC-5 Processors
  • Allen-Bradley 1756 Ethernet/IP Bridges for network expansion
  • RSLogix 5 programming software for configuration and diagnostics

Industry Applications

  • Automated manufacturing and production lines
  • Power generation and energy distribution systems
  • Oil and gas refinery process control
  • Material handling and conveyor automation
  • Water and wastewater treatment facilities

Installation & Operational Notes

  • Ensure proper mounting in a VMEbus rack for optimal performance
  • Verify Data Highway Plus (DH+) and Local I/O connections before deployment
  • Use RSLogix 5 software for programming and system diagnostics
  • Regularly check battery backup for memory retention reliability
  • Follow Allen-Bradley’s installation guidelines to ensure long-term operation

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