Description
- Model: 1756-L82E
- Brand: Allen-Bradley / Rockwell Automation
- Series: ControlLogix 5580
- Core Function: High-capacity Logix controller for industrial automation
- Type: PLC Controller / CPU Module
- Key Specs: 5 MB user memory | 1 Gb EtherNet/IP | Up to 175 EtherNet/IP devices
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Catalog Number | 1756-L82E |
| Product Family | ControlLogix 5580 |
| Controller Type | ControlLogix Controller |
| User Memory | 5 MB |
| Ethernet Port | 1 × EtherNet/IP, 10/100/1,000 Mbps |
| Programming Port | 1 × USB, Type B |
| EtherNet/IP Nodes | Up to 175 nodes with Logix Designer version 30 or later |
| Motion | Integrated Motion over EtherNet/IP |
| Non-volatile Memory | Secure Digital (SD) card |
| Display | 4-character alphanumeric display |
| Configuration Software | Studio 5000 Logix Designer |
| Lifecycle | Active |
Allen-Bradley 1756-L82E
Product Introduction
The Allen-Bradley 1756-L82E is a ControlLogix 5580 programmable controller designed for demanding industrial control applications. It provides 5 MB of user memory, USB programming, and an integrated 1 Gb EtherNet/IP interface.
For existing ControlLogix installations, the controller provides a practical platform for high-capacity logic, EtherNet/IP communications, and integrated motion applications. Studio 5000 Logix Designer is the engineering environment used with the 5580 family.
Application Scenarios & Engineering Considerations
A controller replacement is rarely just a matter of matching the catalog number. The real engineering question is whether the existing chassis, project revision, network architecture, firmware, and I/O configuration all line up.
Typical Applications
- Process Automation — Plant Control
Used as the main Logix controller for coordinated process sequences, equipment interlocks, and EtherNet/IP-connected field devices. - Discrete Manufacturing — Production Lines
Suitable for machine sequencing and factory automation where numerous EtherNet/IP devices must exchange data with the controller. - Material Handling — Conveyor Systems
The integrated EtherNet/IP interface and motion capability are useful where conveyor control, drives, and coordinated motion share the same automation architecture. - Packaging Machinery — High-Speed Control
Appropriate for applications requiring substantial controller memory and integrated motion over EtherNet/IP. - Plant-Level Automation — Large I/O Architectures
ControlLogix systems can accommodate substantial I/O architectures; the 5580 family supports up to 128,000 digital I/O points and 4,000 analog I/O points at the family level.
Engineering Note
One point deserves attention during procurement: do not treat 1756-L82E as interchangeable with every 1756-L8x controller. Memory capacity, EtherNet/IP node limits, firmware requirements, and project compatibility vary across the 5580 family. Rockwell specifies 5 MB for the L82E, while L81E, L83E, L84E, and L85E use different memory capacities.
Allen-Bradley 1756-L82E
Compatibility & Replacement Matrix
| Existing / Candidate Model | Compatibility | Engineering Note |
|---|---|---|
| 1756-L81E | Requires engineering review | Different controller memory capacity; verify project and firmware requirements. |
| 1756-L82E | Direct same-model replacement | Verify Series, firmware revision, project revision, and configuration before commissioning. |
| 1756-L83E | Not a catalog-number-equivalent replacement | Higher memory capacity and different controller specification; validate application before substitution. |
| 1756-L84E | Requires engineering review | Different memory capacity and system requirements. |
| 1756-L85E | Requires engineering review | Higher-capacity controller; substitution should be validated against the existing project. |
| 1756–NSE | Not identical | NSE is a No Stored Energy variant; do not substitute solely by memory size. |
| 1756-L82EXT | Application-dependent | XT variant has different environmental/application characteristics; confirm project and installation requirements. |
Rockwell’s documentation groups the with the 5 MB 5580 controllers and identifies different memory and EtherNet/IP node limits across the L8x family.
Firmware check is mandatory. Before swapping a controller, record the firmware revision of the existing unit and confirm that the replacement supports the required Studio 5000/Logix Designer project revision. Rockwell currently lists ControlLogix 5580 firmware downloads through version 38.011 for this controller family.
Stock condition, serial number, exact Series, firmware revision, and country of origin should be confirmed against the physical unit before shipment. The manufacturer lists country of origin as multiple locations for this catalog number.
Quality-Control Checks
For an inventory replacement, the recommended inspection sequence is:
- Verify catalog number, Series, serial number, and nameplate.
- Check housing, connectors, display, and terminals for physical damage.
- Verify the controller powers up correctly in an appropriate ControlLogix test setup.
- Confirm USB and EtherNet/IP communication where the test environment permits.
- Record firmware revision and controller status.
- Compare project compatibility before field installation.
- Package the controller in ESD protection with suitable mechanical protection.
The supplied source specifically requires source traceability, serial-number verification, functional testing, electrical checks, firmware recording, and final QC documentation.
Important: Rockwell currently lists the standard 1756- as Active, so it should not be described as obsolete or discontinued.
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