Allen Bradley 1785-LT2 PLC-5/25 Processor Module

Allen-Bradley 1785-LT2 PLC-5/25 Processor Module

The Allen-Bradley 1785-LT2 is a robust processor module from the PLC-5 series, designed to deliver reliable performance in industrial automation applications. This module serves as the central processing unit (CPU) for PLC-5/25 systems, executing control programs and managing input/output (I/O) operations.

Key Features

• Memory Capacity: Offers 13K words of user memory, expandable to 17K or 21K words, accommodating complex control programs.
• I/O Support: Handles up to 1024 I/O points, configurable as any mix of digital and analog inputs and outputs.
• Communication Ports: Equipped with one Data Highway Plus (DH+) port and one Remote I/O (RIO) port, facilitating seamless communication within the control system.
• Scan Time: Achieves a program scan time of 2 milliseconds for discrete logic, with a typical scan time of 8 milliseconds, ensuring prompt processing of control tasks.

Technical Specifications

• Manufacturer: Allen-Bradley
• Part Number: 1785-LT2
• Controller Memory: 13K words SRAM, expandable to 17K or 21K words
• Maximum I/O Capacity: 1024 points, configurable as any mix of inputs and outputs
• Communication Ports: 1 DH+ port; 1 RIO port
• I/O Scan Time per Rack:
  • 10 ms at 57.6 kbps
  • 7 ms at 115.2 kbps
  • 3 ms at 230.4 kbps
• RS-232-C/422-A/423-A Ports: None
• Control Coprocessor Expansion Port: Yes
• Controller Redundancy: Supported

Physical Dimensions

• Dimensions: 2.0″ x 6.0″ x 11.0″ (5.1 cm x 15.2 cm x 27.9 cm)
• Weight: Approximately 3 lbs 4.9 oz (1.5 kg)

The 1785-LT2 processor module is engineered to meet the demands of complex industrial processes, offering scalability and efficient communication capabilities. Its expandable memory and substantial I/O support make it a versatile choice for various automation tasks.