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Description
Allen Bradley 1756-L81E/B ControlLogix 5580 Processor Module
The Allen Bradley 1756-L81E/B, also cataloged as the 1756-L81E Processor Module, operates as a dedicated hardware component for controller execution, EtherNet/IP communication, and I/O data management within ControlLogix 5580 platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-L81E/B |
| Brand | Allen Bradley |
| Weight | 0.25 kg |
| Operating Temp | 0 deg C to 60 deg C |
| Power Consumption | Approx. 2.5 W |
| Product Type | ControlLogix Processor Module |
| Product Line | ControlLogix 5580 |
| Controller Type | ControlLogix 5580 Standard Controller |
| User Memory | 10 MB |
| Onboard Storage | 1 GB SD card expandable storage |
| Embedded Ethernet | Dual 1 Gbps Ethernet ports |
| Communications | EtherNet/IP native, ControlNet, DeviceNet, DH+, Remote I/O via modules |
| USB Port | Programming only |
| Maximum Digital I/O | 128,000 points |
| Maximum Analog I/O | 4,000 points |
| Safety Function | Standard controller, no GuardLogix safety functions |
| Storage Temp | -40 deg C to 85 deg C |
| Relative Humidity | Up to 95% non-condensing |
| Shock Rating | IEC 60068-2-27 |
| Vibration Rating | IEC 60068-2-6 |
| Certifications | CE, KC, C-Tick, IECEx compliance |
EtherNet/IP Deterministic Network and Firmware Compatibility Features
The 1756-L81E/B processor module integrates embedded dual 1 Gbps Ethernet ports for direct EtherNet/IP communication within ControlLogix 5580 systems. The integrated network interface reduces dependence on separate communication modules for controller-level Ethernet connectivity.
The module uses ControlLogix backplane bus communication for chassis data exchange and I/O module coordination. I/O density scaling is supported through the ControlLogix architecture, allowing management of up to 128,000 digital I/O points and 4,000 analog I/O points in compatible configurations.
Firmware flash compatibility within the ControlLogix 5580 platform enables controller lifecycle management through supported Studio 5000 Logix Designer environments. The processor supports deterministic EtherNet/IP network operation for controller communication, remote I/O exchange, and system integration.
Frequently Asked Questions
Q: What Ethernet capability is integrated into the 1756-L81E/B processor module?
A: The module includes dual embedded 1 Gbps Ethernet ports for native EtherNet/IP communication.
Q: Does the 1756-L81E/B provide safety controller functions?
A: No. The module is a standard ControlLogix controller and does not include GuardLogix safety execution functions.
Q: What memory capacity is available for user applications?
A: The processor provides 10 MB of user memory for application programs, controller data, and system configuration storage.
Field Installation Guidelines
Install the 1756-L81E/B processor module into a compatible ControlLogix 5580 chassis and verify chassis power capacity before applying system power.
Ensure the processor is fully seated in the backplane connector and maintain proper chassis grounding. Route Ethernet communication cables separately from high-voltage power conductors to reduce electromagnetic interference.
Use shielded and properly terminated communication cabling according to the EtherNet/IP network installation requirements. Confirm firmware compatibility between the processor, communication modules, and connected I/O devices before commissioning.
For network installations, verify Ethernet switch configuration, IP addressing, and communication topology before placing the controller into operation.
Features
We welcome bulk orders and have a minimum order quantity of just one unit.
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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