Description
The Allen-Bradley 1756-L81E is a ControlLogix 5580 programmable automation controller designed for high-performance industrial control applications. It features embedded Ethernet and USB ports, 3 MB of user memory, and supports multiple industrial network protocols for flexible integration.
Technical Specifications
| Brand |
Allen-Bradley |
| Manufacturer |
Rockwell Automation |
| Part Number |
1756-L81E |
| Module Type |
ControlLogix Controller |
| Redundant Power Supply |
1756-PA75R, 1756-PA75RK, 1756-PB75R, 1756-PB75RK, 1756-PSCA2, 1756-PSCA2K |
| Standard Power Supply |
1756-PA50, 1756-PA72, 1756-PA72K, 1756-PA75, 1756-PA75K, 1756-PB50, 1756-PB72, 1756-PB72K, 1756-PB75, 1756-PB75K, 1756-PH75, 1756-PC75 |
| Chassis |
1756-A4, 1756-A4K, 1756-A7, 1756-A7K, 1756-A10, 1756-A10K, 1756-A13, 1756-A13K,1756-A17, 1756-A17 K Series B, Series C |
| Communication interfaces |
One (1) Ethernet; One (1) USB |
| Enclosure |
None (Open-Style) |
| Isolation Voltage |
50 Volts Continuous |
| User Memory |
3 MB |
| Current Draw (1.2 Volts DC) |
5.0 Miliamperes |
| Current Draw (5.1 Volts) |
1.20 Miliamperes |
| Power Dissipation |
6.2 Watts |
| Series |
ControlLogix |
| Maximum I-O |
128,000 |
| Maximum Analog I-O |
4,000 |
| Maximum Digital I-O |
128,000 |
| Thermal Dissipation |
21.2 BTU per hour |
Information About 1756-L81E
The 1756-L81E is part of the Allen-Bradley ControlLogix 5580 family, offering advanced performance and connectivity for modern automation systems. It supports Ethernet communication at 10/100/1000 Mbps through its embedded Ethernet port and also provides a USB interface for programming and diagnostics. Beyond Ethernet, it can interface with ControlNet, DeviceNet, Remote I/O, SynchLink, Data Highway Plus, and third-party networks through additional modules. The controller comes with 3 MB of user memory and a 2 GB non-volatile SD card (1784-SD2), eliminating the need for battery backup by using an energy storage solution. Capable of handling up to 128,000 digital I/O and 4000 analog I/O points, it provides scalability for a wide range of industrial applications. The unit installs in any ControlLogix chassis slot and is well-suited for complex automation processes requiring fast response, reliability, and modern migration capability.
Key Features:
- Communication: Embedded Ethernet port supporting 10/100/1000 Mbps and one USB programming/diagnostic port.
- Memory: 3 MB user memory with 2 GB non-volatile SD card included, eliminating battery requirements.
- Capacity: Supports up to 128,000 discrete I/O points and 4000 analog I/O points for large-scale systems.
- Network Integration: Compatible with Ethernet/IP, ControlNet, DeviceNet, DH+, SynchLink, Remote I/O, and third-party networks.
- Performance: High-speed processing ensures fast execution for demanding industrial applications.
- Power: Draws 1.20 A at 5.1VDC and 5.0 A at 1.2VDC, with maximum power dissipation of 6.2 W.
- Safety: 50 V continuous isolation voltage provides electrical protection within the system.
- Installation: Fits into any slot of a ControlLogix chassis for flexible system design.
The 1756-L81E delivers the reliability and precision required for advanced control and automation in modern industrial environments.
Manufacturer information
Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.
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