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

    Discontinued / Obsolete by OEM
    Apter Power checks catalog identity, firmware, project evidence, condition, and channel records before sourcing coordination.

1785-L80B

/ 4.9
1001 reviews | Need a Specific Revision?
Allen-Bradley 1785-L80B is the 100 K-word PLC-5/80 processor whose four configurable DH+ or Remote I/O channels serve high-capacity 1771 control estates.
In Stock
Ships by Wednesday, October 28
Fast Shipping Available
Get a quick price for 1785-L80B
Quantity
*E-mail
Company
*Mobile
*Content
Upload (gif, jpg, jpeg, png, bmp, doc, docx, xls, xlsx, ppt, pdf, csv)

Technical specifications for 1785-L80B

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1785-L80B
  • Product Family:
    PLC-5
  • Product Type:
    PLC-5/80 Enhanced Programmable Controller
  • Stock:
    1
  • Maximum user memory:
    100 K words
  • Maximum total I/O:
    3,072 any mix or 3,072 inputs plus 3,072 outputs complementary
  • Communication channels:
    4 DH+ or Remote I/O; 1 serial
  • Maximum I/O rack addresses:
    24 (0…27 octal)
  • Maximum I/O chassis:
    93 total; 92 remote
  • Total data-table space:
    64 K words
  • Maximum program file:
    56 K words
  • Maximum data-table file:
    32 K words
  • Backplane current:
    3.3 A at 5 V DC
  • Power dissipation:
    17.3 W
  • Operating temperature:
    0…60 °C
  • Storage temperature:
    -40…85 °C
  • Relative humidity:
    5…95%, noncondensing
  • Chassis position:
    Left-most slot in a supported 1771 chassis
  • Weight:
    1.42 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 Rack Estate Control Memory Boundaries Four-Link Recovery Product Applications

Features:

  • High-capacity memory: 100 K words with published internal file boundaries
  • Four network channels: assign each independently to DH+ or Remote I/O duties
  • Large chassis estate: up to ninety-three total chassis under the documented rack plan
1785-L80B concentrates the largest Enhanced PLC-5 memory allocation in a four-channel processor for extensive 1771 installations.

Its main engineering advantage is channel separation: rack scanning, peer traffic, programming access, and fault isolation can be organized as distinct responsibilities.

A dependable replacement record joins octal rack ownership, file sizes, channel settings, battery condition, Series/Revision, and a verified application archive.
Apter Power can compare the 1785-L80B nameplate, four-channel face, firmware evidence, and project record before quotation.
Allen-Bradley 1785-L80B PLC-5/80 Enhanced Programmable Controller 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.
  • Address register: maintain one octal map for racks 0…27 across every scanner channel.
  • Ownership rule: assign each remote rack to exactly one channel and reject duplicate scan-list entries.
  • Physical limits: confirm baud-rate, cable length, termination, and per-link device count in addition to processor capacity.
  • Total allocation: size the controller application within the published 100 K-word user memory.
  • File ceilings: retain the separate 56 K program-file and 32 K data-table-file maximums.
  • Change proof: compare indirect addresses and file growth against a tested offline archive before download.
  • Staged return: commission one communication channel at a time before enabling all remote outputs.
  • Status evidence: correlate each channel indicator with its assigned mode and rack list.
  • Retention plan: capture the battery state, memory-module identity, project checksum, and firmware revision for recovery.
  • High-capacity 1771 control: execute large PLC-5 applications across an extensive rack estate.
  • Multi-link Remote I/O scanning: partition supported chassis across four independently configured channels.
  • DH+ and serial communication: combine documented peer, programming, and serial duties with the control application.
Description
Internal file architecture is a decisive selection boundary for 1785-L80B: its 100 K-word application capacity still retains separate limits for total data tables, program files, and individual data-table files.

Four independently configurable DH+ or Remote I/O channels distinguish 1785-L80B within the Enhanced PLC-5/80 range. Together with the serial interface, these paths let a large 1771 installation separate scanner duties, peer traffic, programming access, and fault isolation.

Across its documented rack estate, 1785-L80B can address 3,072 I/O in any mix and as many as ninety-three chassis. A replacement record should preserve octal rack ownership, channel modes, Series/Revision, battery condition, and the validated application archive.
Revisions

Revision Part #

Also known as

1785-L80B Series C
1785-L80B/C, Series C, Revision U.2
1785-L80B Series D
1785-L80B/D, Series D, Revision L.2
1785-L80B Series E
1785-L80B/E, Series E, Revision K.2
Alternative Names
Allen-Bradley 1785-L80B Rockwell Automation 1785-L80B AB 1785-L80B 1785L80B 1785 L80B PLC-5/80 Enhanced Programmable Controller 1785-L80B
Technical notes
Treat the internal file ceilings as the first acceptance gate for 1785-L80B: 100 K words of controller memory do not remove the 64 K total data-table, 56 K program-file, or 32 K data-table-file limits. Reconcile all four channel modes and octal rack ownership before downloading an installed project.
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.
Why can 1785-L80B report a file-size fault while total controller memory remains available?
Measure the affected file, enforce the 56 K program-file and 32 K data-table-file ceilings, inspect indirect references, and test any reorganization offline before download.
How should duplicate rack ownership be isolated across the four channels of 1785-L80B?
Export every scan list, map octal racks 0…27 to one channel, compare adapter switches, and remove duplicates with outputs controlled before restoring the link.
What should be preserved before a battery warning on 1785-L80B becomes a power-loss event?
Secure the validated project, checksum, data tables, channel configuration, Series/Revision, and memory-module record; plan the correct battery service before removing chassis power.
Can 1785-L80B accept every project built for another PLC-5/80 catalog?
No. Compare the complete catalog, communication ports, Series/Revision, memory limits, channel modes, rack range, and application image; reject Ethernet or ControlNet siblings until every architecture difference is reconciled.
What causes one Remote I/O link on 1785-L80B to fail after its baud rate is raised?
Measure trunk and drop lengths, verify both terminating resistors, confirm every device uses the same rate, and inspect the affected channel without disturbing the other three links.
Which evidence should procurement require for a replacement 1785-L80B?
Request full catalog and Series/Revision photographs, the four-channel front face, battery and memory records, project checksum, rack map, condition, quantity, and destination before shipment approval.

Product Browsing History