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Allen Bradley PLC 5 1785-L40B/E

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1785-L40B/E

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The 1785-L40B/E is a PLC-5/40 Processor Module from Allen Bradley, offering significant processing capabilities for industrial automation. With a total I/O capacity of 2048 and a user memory of 48 K words, this unit supports a robust range of control applications.

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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-L40B/E

ManufacturerAllen Bradley
Product TypePLC-5/40 Processor Module
Product LinePLC 5
Part Number1785-L40B/E
Weight3.13 lbs (1.42 kg)
UPC612598124015
Total I/O Capacity2048
User Memory48 K words SRAM, battery backed
Max Analog I/O2048
Power Dissipation17.3 watts
I/O Scan Time10 ms at 57.6 kbps
Backplane Current (5V DC)3.3 Amperes
Communication PortsChannel 0, Channel 1A, 2A, 1B, 2B
Max I/O Chassis61 total
EnclosureOpen type
Operating Temperature0 to 60 degrees C
CoolingNatural convection
Protection FeatureBattery backed RAM for user program/data, EEPROM program backup option
Battery1770-XYC Lithium
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The PLC-5/40 Processor Module, identified by part number 1785-L40B/E, serves a critical role in automation systems developed by Allen Bradley. This processor boasts a total I/O capacity of 2048, which allows it to handle a substantial number of input and output configurations efficiently. Its user memory is configured with 48 K words of SRAM that is backed up by a battery, providing reliable storage for essential programs and data.

Designed for demanding applications, this module supports a maximum of 2048 analog I/O as well. It requires 17.3 watts of power, and with an I/O scan time of just 10 milliseconds at a communication rate of 57.6 kbps, it ensures responsive operation in various scenarios. The backplane draws 3.3 amperes at 5V DC, accommodating reliable power delivery.

This module is equipped with multiple communication channels, including Channel 0, Channel 1A, Channel 1B, Channel 2A, and Channel 2B, facilitating extensive connectivity. Capable of mounting up to 61 I/O chassis, it provides flexibility for system expansion. The open-type enclosure allows for straightforward installation and access.

The 1785-L40B/E operates within a temperature range from 0 to 60 degrees Celsius and utilizes natural convection for its cooling requirements. To protect critical user programs and data, the module incorporates a battery-backed RAM system, along with an optional EEPROM program backup feature. A lithium battery (1770-XYC) powers the memory backup, ensuring stability during power outages.