Ask our team:
  • Phone: +86 181 0690 9650
  • E-Mail sales1@apterpower.com

1785-L40E

/ 4.9
1001 reviews | Need a Specific Revision?
Allen-Bradley 1785-L40E is a 48 K-word PLC-5/40E processor with AUI Ethernet, two configurable DH+ or Remote I/O channels, and a serial interface.
In Stock
Ships by Wednesday, October 28
Fast Shipping Available
Get a quick price for 1785-L40E
Quantity
*E-mail
Company
*Mobile
*Content
Upload (gif, jpg, jpeg, png, bmp, doc, docx, xls, xlsx, ppt, pdf, csv)

Technical specifications for 1785-L40E

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1785-L40E
  • Product Family:
    PLC-5
  • Product Type:
    PLC-5/40E Ethernet Processor
  • Stock:
    1
  • Processor Designation:
    PLC-5/40E
  • Maximum User Memory:
    48K words
  • Maximum I/O:
    2048 any mix or 2048 input plus 2048 output in complementary mode
  • DH+ or Remote I/O Channels:
    2
  • Ethernet Ports:
    1 channel
  • Ethernet Physical Interface:
    15-pin AUI transceiver port
  • Serial Ports:
    1
  • Maximum Number of I/O Racks:
    16
  • Maximum I/O Chassis:
    61 total; 60 remote
  • Chassis Location:
    Leftmost slot in a supported 1771 chassis
  • Keying Locations:
    Between 40 and 42; between 54 and 56
  • Operating Temperature:
    0 to 60°C
  • Storage Temperature:
    -40 to 85°C
  • Relative Humidity:
    5% to 95%, non-condensing
  • Dimensions:
    4.8 × 16.7 × 27.4 cm
  • Weight:
    1.39 kg
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Channel Allocation Rack Planning Network Recovery Application
  • Stores the control program and operating data within a 48K-word PLC-5 memory space
  • Links programming and plant-network communications through its built-in Ethernet TCP/IP connection
  • Assigns two separate channels to Data Highway Plus or remote-I/O duties as required by the rack design

1785-L40E serves installations that require more memory and I/O architecture than the L20E class while retaining the PLC-5 programming model.

Its communication layout separates Ethernet from the two channels that may be assigned to Data Highway Plus or remote I/O.

The larger rack allowance makes accurate restoration of chassis addresses and scanner relationships critical during a controller change.

Availability, condition, price, and shipping time for 1785-L40E are confirmed during quotation.

Allen-Bradley 1785-L40E PLC-5/40E Ethernet Processor Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • Two channels can be assigned to Data Highway Plus or remote-I/O functions.
  • One separate Ethernet channel provides TCP/IP communication through an AUI transceiver.
  • One serial channel remains available for the documented processor functions.
  • The official table lists up to sixteen I/O racks for PLC-5/40E.
  • The chassis total includes local and remote 1771 installations.
  • Rack and chassis addresses must be preserved with the application.
  • Record Ethernet parameters and external transceiver connections.
  • Retain DH+, remote-I/O, serial, and messaging configurations.
  • Prove controller, HMI, peer, and remote-chassis communication after restoration.
  • PLC-5/40E control systems requiring up to 48K words and sixteen I/O racks
  • 1771 architectures combining Ethernet TCP/IP with two configurable DH+/Remote I/O channels
  • Distributed control applications using up to 2048 mixed I/O points across local and remote chassis
Description
Allen-Bradley 1785-L40E serves larger PLC-5 architectures with 48K words of program capacity and a dedicated Ethernet path through the documented 15-pin AUI interface.

Two additional channels can be assigned to Data Highway Plus or remote-I/O duties, allowing the controller to coordinate as many as sixteen racks and sixty remote chassis in the official configuration limits.

Returning an L40E system to service depends on reconstructing its channel roles, AUI transceiver and IP identity, rack map, chassis addresses, Series marking, battery-backed data, and validated machine project.
Revisions

Revision Part #

Also known as

1785-L40E Ser E
1785-L40E/E, Series E, Rev E
1785-L40E Ser F
1785-L40E/F, Series F, Rev F
Alternative Names
1785-L40E Allen-Bradley 1785-L40E Allen Bradley 1785-L40E PLC-5/40E 1785-L40E Bulletin 1785-L40E
Technical notes
1785-L40E service work must preserve Series, 48K project, rack plan, DH+ and remote-I/O assignments, Ethernet identity, serial settings, and chassis keying; catalog similarity does not guarantee interchangeability.
Exceptional Service

Our Mission

  • 100% Satisfaction

    We believe expertise is priceless. With over 20 years of experience, and top engineers on staff, we can help you solve or avoid problems that threaten your business.
  • Trust Guaranteed

    Not only do we have a vast inventory, our team makes sure every piece of equipment is in working condition. Your purchases are also backed by our Warranty.
  • Expertise

    Time is money, especially when your equipment is down. We work quickly to get your equipment on its way so you can get it back up and running.

FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What application scale is appropriate for Allen-Bradley 1785-L40E?
Use it where the validated PLC-5 project, rack count, remote chassis, memory use, and communication layout fall within the documented L40E architecture.
How should Allen-Bradley 1785-L40E communication channels be matched during replacement?
Document which channels serve Data Highway Plus, remote I/O, Ethernet, and serial communication, then reproduce the assignments and cabling used by the installed controller.
Can an Allen-Bradley 1785-L20E project always be moved to Allen-Bradley 1785-L40E?
Not automatically. Review the hardware Series, I/O addressing, channel configuration, Ethernet setup, firmware expectations, and machine validation before changing processor catalog.
What should be checked if Allen-Bradley 1785-L40E starts but remote I/O remains inactive?
Verify scanner-channel mode, rack addresses, baud rate, termination, cabling, chassis settings, and that the restored project contains the correct remote-I/O configuration.
Why does Allen-Bradley 1785-L40E replacement require Ethernet records as well as a program backup?
The ladder project does not replace every external addressing, transceiver, network-path, HMI, and messaging detail needed to restore plant communication.
Where is Allen-Bradley 1785-L40E mounted in the 1771 chassis?
Install it in the documented leftmost processor slot of a compatible 1771 chassis after confirming chassis power, keying, and connector condition.
What is the main selection risk when sourcing Allen-Bradley 1785-L40E?
Confusing L40E with another PLC-5/40 catalog can omit the required Ethernet interface or introduce different channel, Series, or application-compatibility constraints.