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1756-L85ES

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Allen-Bradley 1756-L85ES is a high-capacity GuardLogix 5580 safety controller with 40 MB standard memory, 3 MB safety memory, and support for 300 EtherNet/IP nodes.
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Technical specifications for 1756-L85ES

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1756-L85ES
  • Product Family:
    ControlLogix
  • Product Type:
    GuardLogix 5580 Safety Controller
  • Stock:
    1
  • Controller family:
    GuardLogix 5580
  • Standard memory:
    40 MB
  • Safety memory:
    3 MB
  • Controller tasks:
    31 standard tasks and 1 safety task
  • EtherNet/IP nodes:
    300 maximum
  • OPC UA nodes:
    15,000 maximum with the stated software condition
  • Embedded Ethernet:
    10/100/1000 Mbps
  • Programming languages:
    Safety task: Ladder Diagram; standard tasks: LD, ST, FBD, and SFC
  • Nonvolatile storage:
    4 GB Secure Digital card supplied
  • Power dissipation:
    6.2 W
  • Approximate weight:
    0.394 kg
  • Weight:
    0.394 kg
  • Estimated shipping dimensions:
    3.46x14.55x14.01cm
  • Tariff Code:
    Please confirm the destination before shipping
  • 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 Memory Split 300-Node Network OPC UA Access Product Applications

Features:

  • Forty-megabyte standard capacity: large application space supports substantial Logix projects
  • Distinct safety allocation: 3 MB safety memory must be sized separately from the standard application
  • Three-hundred-node network: the embedded gigabit port supports the largest documented node count in this GuardLogix group
1756-L85ES is selected for systems whose standard application, network inventory, and external data demand require the highest catalog capacity in this group.

The 3 MB safety allocation is smaller than the adjacent model’s safety memory, so model selection must use the actual safety project rather than family rank.

A reliable handover joins the Series B label with memory reports, node inventory, firmware, safety partner, signature, SD image, performance baseline, and full validation record.

Availability of 1756-L85ES is subject to Apter Power inventory and sourcing confirmation.
Allen-Bradley 1756-L85ES GuardLogix 5580 Safety 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.
  • Standard application: evaluate program, tag, motion, message, and data requirements against 40 MB.
  • Safety application: confirm the protected project remains within the separate 3 MB allocation.
  • Growth margin: reserve capacity independently on both sides of the controller.
  • Evidence: store memory reports with the accepted project and safety signature.
  • Inventory: count directly configured EtherNet/IP nodes against the 300-node maximum.
  • Packet demand: assess I/O rate, connection sizes, HMI and messaging traffic.
  • Security: include integrity or confidentiality overhead where configured.
  • Acceptance: trend utilization, connection stability, faults, and controller execution at representative load.
  • Namespace: apply the documented 15,000-node limit with its software condition.
  • Client policy: define subscriptions, update rates, sessions, and certificate trust.
  • Change control: coordinate tag publication with safety and standard project revisions.
  • Recovery: archive network, OPC UA, firmware, SD, and validation baselines together.
  • Large integrated-safety systems: execute extensive standard control with a protected safety task.
  • High-node-count EtherNet/IP: coordinate broad industrial device and I/O architectures.
  • Industrial data integration: publish approved controller information through supported OPC UA services.
Description
1756-L85ES is the largest standard-memory catalog in the documented GuardLogix 5580 group, providing 40 MB for standard application content and a separate 3 MB safety allocation. The unequal resource pair must be sized from the actual project rather than inferred from the model number.

The embedded gigabit interface of 1756-L85ES supports as many as 300 directly configured EtherNet/IP nodes and a documented OPC UA capacity of 15,000 nodes under the stated software condition. A high device count still requires traffic, message, security, connection, and execution-margin analysis.

Functional-safety acceptance for 1756-L85ES remains architecture-dependent. The qualified safety partner is required for the published higher-integrity path, while project firmware, safety signature, SD recovery media, network inventory, and fault-response test must be preserved as one verified controller baseline.
Revisions

Revision Part #

Also known as

1756-L85ES Series B
1756-L85ES/B, Series B
Alternative Names
Allen-Bradley 1756-L85ES safety controller Rockwell Automation 1756-L85ES AB 1756 L85ES 1756L85ES GuardLogix CPU GuardLogix 5580 40 MB controller 1756-L85ES 1756-L85ES Series B
Technical notes
Do not assume the largest model provides the largest safety allocation: 1756-L85ES has 40 MB standard memory and 3 MB safety memory. Validate that split with the 300-node network, OPC UA demand, partner requirement, firmware, signature, and project recovery plan.
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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 1756-L85ES be the largest controller yet have less safety memory than the adjacent model?
Its documented resource pair is 40 MB standard and 3 MB safety. Catalog position does not imply that both memory pools increase together.
How should a 300-node design be evaluated for 1756-L85ES?
Count direct nodes, then model I/O packets, connection sizes, HMI and messages, produced and consumed tags, security overhead, failure recovery, and execution margin.
What must be checked before moving a safety project to 1756-L85ES?
Confirm the 3 MB safety allocation, supported firmware and software, instruction and task behavior, partner architecture, I/O ownership, signature, and full revalidation plan.
How should OPC UA load be tested on 1756-L85ES?
Use the intended namespace, clients, subscriptions, security, and update rates while monitoring controller utilization, connection stability, and standard and safety task behavior.
Which records protect recovery of 1756-L85ES after hardware replacement?
Keep the Series B catalog identity, firmware, project, memory reports, safety signature, partner configuration, SD image, network inventory, OPC UA certificates, and accepted diagnostics.
What proves 1756-L85ES is ready for production after commissioning?
Demonstrate network and client load, standard control, safety I/O, partner status, signatures, fault reactions, recovery media, and environmental conditions under the approved validation procedure.