Allen-Bradley 1785-L20B Programmable Logic Controller (PLC)

The AB 1785-L20B is a Programmable Logic Controller (PLC) manufactured by Allen-Bradley, now Rockwell Automation. It belongs to the PLC-5 series, designed for mid-range to large-scale control applications. The 1785-L20B specifically is a processor module, the central processing unit of the PLC system.

Key Features:
Processing Power: The 1785-L20B features a powerful 32-bit microprocessor capable of handling complex control programs.
Memory Capacity: It has 16K words of user memory for storing PLC code and data.
Communication Ports: Provides multiple communication options, including DH+, DH+/Remote I/O, and RS-232, for connecting to various devices and networks.
I/O Expansion: Supports expansion through I/O chassis to accommodate a wide range of input and output signals.
Rugged Design: Built for industrial environments with resistance to vibration, shock, and extreme temperatures.

Applications:
The AB 1785-L20B was widely used in various industrial automation and control applications, including:
Manufacturing: Controlling production machinery, conveyor systems, and robotic equipment.
Process Control: Regulating parameters in processes like oil refining, chemical manufacturing, and power generation.
Building Automation: Managing heating, ventilation, air conditioning (HVAC), and lighting systems in commercial and industrial buildings.

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