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Allen Bradley PLC 5 1785-L20E/E

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1785-L20E/E

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The 1785-L20E/E is an Ethernet-based programmable logic controller from Allen Bradley’s PLC 5 series. It accommodates 512 total I/O, supporting a maximum of 512 analog I/O configurations.

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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 1785-L20E/E

ManufacturerAllen Bradley
Product TypeEthernet Programmable Logic Controller
Product LinePLC 5
Part Number1785-L20E/E
Weight3.06 lbs (1.39 kg)
UPC612598126422
User Memory16 K words
Total I/O Capacity512
Max Analog I/O512
Backplane Current (5V DC)3.6 Amperes
Power Dissipation19 watts
I/O Scan Time10 ms at 57.6 kbps, 3 ms at 230.4 kbps
Max I/O Chassis13 total (1 local + 12 remote)
Communication Channels4 (Channel 0, Channel 1A, Channel 1B, Channel 2)
CertificationsUL, CSA, CE
CoolingNatural convection
Operating Temperature0 to 60 degrees Celsius
Battery1770-XYC Lithium
Special FeatureBuilt-in web server
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The Allen Bradley 1785-L20E/E functions as an Ethernet programmable logic controller that integrates advanced features for networking and automation tasks. It offers a considerable capacity of 16 K words for user memory, which assists in executing complex processes. With a total I/O capacity of 512, the unit supports up to 512 channels dedicated to analog I/O signals, establishing versatile operational capabilities.

For I/O chassis connections, this controller can accommodate a maximum of 13 units, comprising 1 local and up to 12 remote configurations, facilitating extensive system deployments. Communication capabilities are robust, with four distinct channels (Channel 0, Channel 1A, Channel 1B, and Channel 2) available, ensuring that data flows seamlessly between the controller and peripheral devices.

This unit operates at a backplane current of 3.6 Amperes with a power dissipation of around 19 watts. Notably, it achieves I/O scan times of 10 milliseconds at 57.6 kbps and 3 milliseconds at 230.4 kbps, maximizing efficiency in real-time applications. Designed with cooling through natural convection, it maintains operational integrity in warm environments.

The controller complies with multiple certifications, including UL, CSA, and CE, indicating its reliability and safety in industrial settings. For battery backup, it utilizes a 1770-XYC Lithium battery. Additionally, an integrated web server enhances accessibility, allowing remote monitoring and control through a web interface. Operating in a temperature range of 0 to 60 degrees Celsius, the 1785-L20E/E is suited for a variety of environments.