PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1756-L84ES is a ControlLogix Controller designed for industrial automation applications. It provides 20 MB of user memory and 6 MB of dedicated safety memory. The unit incorporates one embedded Ethernet port supporting up to 250 EtherNet/IP nodes. A built-in USB port operates at a full speed of 12 Mbps for local programming and maintenance.
This controller manages execution with up to 31 standard tasks and one safety task. Each configured task supports up to 1000 individual programs. System architecture permits unlimited local I/O event triggers during operation. The unit works with 1756-L8SP and 1756-L8SPK safety partner devices. Controller redundancy is not supported on this model.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| UPC | 889508112312 |
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| Weight | 1.69 lbs (0.77 kg) |
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| Safety Communication Options | Ethernet/IP, ControlNet, and DeviceNet (Standard and Safety) |
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| Maximum Number of Ethernet/IP Nodes | 250 Nodes |
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| Controller Redundancy Option | Not Supported |
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| Compatible Safety Partner Devices | 1756-L8SP and 1756-L8SPK |
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| Maximum Number of Standard Tasks | 31 Standard Tasks |
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| Maximum Number of Safety Tasks | 1 Safety Task |
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| Maximum Number of Programs per Task | 1000 Programs per Task |
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| Maximum Number of Local I/O Event Triggers | No Limit |
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| Number of Built-in USB Ports | 1 USB Port |
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| Number of Built-In Ethernet Ports | 1 Embedded Ethernet Port |
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| Full USB Port Speed | 12 Mbps |
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| User Memory | 20 MB |
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| Safety Memory | 6 MB |
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TECHNICAL INFORMATION
Features
- Equipped with 20 MB user memory and 6 MB dedicated safety memory.
- Includes one embedded Ethernet port supporting up to 250 EtherNet/IP nodes.
- Integrated full-speed USB port operating at 12 Mbps.
- Supports 31 standard tasks and 1 dedicated safety task.
- Handles up to 1000 programs per task without local I/O event trigger limitations.
- Communicates over EtherNet/IP, ControlNet, and DeviceNet for standard and safety functions.
TECHNICAL INFORMATION
Applications
- Integrated safety and standard control in industrial production systems.
- High-node EtherNet/IP network architectures requiring functional safety integration.
- Machinery safety monitoring using dedicated safety partner devices.
TECHNICAL INFORMATION
Connections / Interfaces
- One embedded Ethernet port supporting network communications up to 250 EtherNet/IP nodes.
- One full-speed USB port operating at 12 Mbps for programming and diagnostics.
- Safety communication support across EtherNet/IP, ControlNet, and DeviceNet networks.
TECHNICAL INFORMATION
Installation Guidelines
- Install the controller into an approved ControlLogix chassis slot.
- Pair with compatible safety partner modules such as 1756-L8SP or 1756-L8SPK when required.
- Connect Ethernet cabling to the integrated port for network distribution.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure up to 31 standard control tasks and 1 safety task in the programming environment.
- Assign up to 1000 programs per task to organize automation logic.
- Utilize local I/O event triggers without quantity restrictions across application routines.
TECHNICAL INFORMATION
Compatibility
- Compatible with 1756-L8SP and 1756-L8SPK safety partner devices.
- Communicates across EtherNet/IP, ControlNet, and DeviceNet networks for safety and standard data.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with 1756-L8SP and 1756-L8SPK safety partner devices. Communicates across EtherNet/IP, ControlNet, and DeviceNet networks for safety and standard data.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
Does the Allen-Bradley 1756-L84ES support controller redundancy?
No. The 1756-L84ES controller architecture does not support controller redundancy options.
Which safety partner devices work with the 1756-L84ES?
The controller is compatible with dedicated 1756-L8SP and 1756-L8SPK safety partner devices.
How many EtherNet/IP nodes can the 1756-L84ES support?
The controller manages up to 250 EtherNet/IP network nodes through its embedded Ethernet port.
