1785-L20E/E Allen-Bradley Controller

Description

The 1785-L20E/E Allen-Bradley Controller is a programmable logic controller (PLC) built on the PLC-5 architecture, designed for industrial automation applications. Key technical specifications include support for 250VAC and 30VDC operating voltages, a 32Hz output frequency, 22A rated current, and operation in 15% environmental humidity. It features 24 input/16 output I/O points, a 32kbyte program capacity, V2.2.0 firmware version, and a CPUST30DC/DC/DC product type designation. With a modular mounting design, compact dimensions of 23mm×100mm×120mm, and weight of approximately 0.4kg, it is easy to integrate into existing control setups. Equipped with a PP800 panel operating system and monochrome 5.7-inch display, it clearly shows industrial parameters and graphical information, and automatically corrects environmental temperature impacts on sensors to ensure stable measurement data. A pioneering product in its class, it was the first in the PLC-5 line to integrate Ethernet communication, offering strong process control capabilities and full compatibility with the 1771 I/O ecosystem. Ideal for use in machine tools, packaging equipment, and other systems, it collects motor speed, torque, and other signals to enable closed-loop control. Though no longer in mainstream production, it remains a critical component in many key infrastructure systems.