Allen-Bradley 1772-LH PLC-2 Processor Interface Module

The Allen-Bradley 1772-LH is a Processor Interface Module designed for the PLC-2 family of programmable controllers. It provides the communication interface between the PLC-2 processor and programming terminals, host computers, and Allen-Bradley Data Highway networks. The module supports advanced PLC-2 functions including online programming, online data changes, timed interrupts, report generation, and Data Highway communications, making it a key component in legacy PLC-2 automation systems.

Confirmed Specifications

  • Manufacturer: Allen-Bradley (Rockwell Automation)
  • Catalog Number: 1772-LH
  • Product Type: Processor Interface Module
  • PLC Platform:
    • PLC-2
    • PLC-2/20
    • PLC-2/30
  • Communication Interface:
    • Allen-Bradley Data Highway
  • Supports:
    • Online programming
    • Online data changes
    • Selectable timed interrupts
    • Report generation
  • Installation: Processor interface for PLC-2 systems
  • Mounting: PLC-2 processor assembly
  • Country of Manufacture: USA
  • Manufacturer Status: Discontinued

Typical Applications

  • PLC-2 programming interface
  • Data Highway communications
  • Manufacturing automation
  • Industrial process control
  • Machine control
  • Legacy Allen-Bradley systems
  • OEM equipment
  • Factory automation
  • PLC maintenance and spare parts
  • Industrial control upgrades

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