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1756-L84ES

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Allen-Bradley 1756-L84ES is a GuardLogix 5580 safety controller with 20 MB standard memory, 6 MB safety memory, and support for 250 EtherNet/IP nodes.
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Technical specifications for 1756-L84ES

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1756-L84ES
  • Product Family:
    ControlLogix
  • Product Type:
    GuardLogix 5580 Safety Controller
  • Stock:
    1
  • Controller family:
    GuardLogix 5580
  • Standard memory:
    20 MB
  • Safety memory:
    6 MB
  • Controller tasks:
    31 standard tasks and 1 safety task
  • EtherNet/IP nodes:
    250 maximum
  • OPC UA nodes:
    15,000 maximum with the stated software condition
  • Embedded Ethernet:
    10/100/1000 Mbps
  • Controller redundancy:
    Supported with Studio 5000 Logix Designer version 37 or later, subject to documented restrictions
  • 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 OPC UA Access Redundancy Limits Chassis Thermal Product Applications

Features:

  • Large safety project capacity: 20 MB standard and 6 MB safety memory support integrated applications
  • OPC UA scale: up to 15,000 documented nodes under the stated engineering-software condition
  • Architecture choice: published redundancy support carries important safety-partner and front-port restrictions
1756-L84ES is intended for larger integrated-safety projects whose data exposure and controller workload require more than memory expansion alone.

Its high OPC UA capacity has value only when namespace governance, certificates, security, clients, and execution load remain within an approved design.

A complete acceptance baseline records whether the controller operates with a safety partner or in the documented redundancy mode because those architectures impose different boundaries.

Availability of 1756-L84ES is subject to Apter Power inventory and sourcing confirmation.
Allen-Bradley 1756-L84ES 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.
  • Capacity: apply the documented 15,000-node maximum only with the stated software condition.
  • Namespace: publish approved tags and structures rather than exposing the project indiscriminately.
  • Security: retain certificates, trust relationships, user policy, and change records.
  • Load test: observe controller execution and client behavior at representative subscription demand.
  • Software condition: use the published Logix Designer version boundary for redundancy support.
  • Safety partner: recognize that it is not supported when controller redundancy is enabled.
  • Front port: account for the embedded Ethernet port being off in redundancy mode.
  • Feature review: apply the documented motion and network restrictions to the complete design.
  • Series C chassis: use the published operating range through 60 °C.
  • Series B chassis: apply the lower 50 °C boundary.
  • Adjacent heat: observe the special spacing note above the stated temperature.
  • Release evidence: record chassis, slot, neighbor load, ambient, and final controller diagnostics.
  • Large integrated-safety control: coordinate substantial standard and safety applications.
  • Industrial data exchange: expose approved controller data through the documented OPC UA capability.
  • Redundant Logix architectures: serve supported high-availability designs under the published restrictions.
Description
1756-L84ES provides 20 MB of standard memory and 6 MB of separately governed safety memory for integrated GuardLogix 5580 applications. An embedded 1 Gb EtherNet/IP interface supports as many as 250 configured network nodes.

A distinctive capacity point for 1756-L84ES is the documented OPC UA limit of 15,000 nodes under the stated software condition. That scale requires deliberate namespace, certificate, client-session, security, and controller-load planning rather than a memory-only selection.

Controller redundancy is supported for 1756-L84ES under the published Logix Designer condition, but enabling redundancy changes the safety and communication architecture: the safety partner is not supported, the front Ethernet port is disabled, and specified motion and network functions are unavailable. The chosen operating mode must therefore be frozen before validation.
Revisions

Revision Part #

Also known as

1756-L84ES Series B
1756-L84ES/B, Series B
Alternative Names
Allen-Bradley 1756-L84ES safety controller Rockwell Automation 1756-L84ES AB 1756 L84ES 1756L84ES GuardLogix CPU GuardLogix 5580 20 MB controller 1756-L84ES 1756-L84ES Series B
Technical notes
The main decision for 1756-L84ES is architecture mode. Preserve the 20 MB/6 MB memory split, 250-node network, 15,000-node OPC UA boundary, firmware, software revision, safety partner, redundancy choice, signature, and validation record.
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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.
What makes OPC UA planning for 1756-L84ES more than a node-count exercise?
A large namespace also requires certificate governance, approved exposure, client and subscription limits, security policy, performance testing, and controlled software revisions.
Can 1756-L84ES use a safety partner while controller redundancy is enabled?
No. Rockwell documents that redundancy mode does not support the safety partner, so the safety integrity architecture and redundancy objective must be reconciled before design approval.
What happens to the embedded Ethernet port of 1756-L84ES in redundancy mode?
The published redundancy conditions state that the front port is off; network architecture must use the supported chassis communication path and account for the other stated restrictions.
How should the 20 MB and 6 MB resources of 1756-L84ES be managed?
Track standard and safety memory separately, retain task ownership and safety signatures, and leave execution and change-control margin for the approved application.
Why does chassis series change the environmental review for 1756-L84ES?
The technical data assigns different operating limits to Series B and Series C chassis and adds an adjacent-module heat condition at elevated temperature.
What evidence is needed after commissioning 1756-L84ES?
Record firmware and software, architecture mode, project revision, safety signature, partner or redundancy state, network and OPC UA baselines, environmental conditions, and validated fault tests.