Description
The Allen-Bradley 1756-L71S is a GuardLogix 5570 programmable automation controller designed for both standard and safety control applications. It provides high-speed processing, extensive I/O capacity, and integrated safety functionality for demanding automation systems.
Technical Specifications
| Brand |
Allen-Bradley |
| Series |
GuardLogix 5570 |
| Part Number |
1756-L71S |
| Manufacturer |
Rockwell Automation |
| Redundancy |
Not supported |
| Optional Communication adapters |
• EtherNet/IP • ControlNet • DeviceNet |
| Built-in communication |
1 USB port |
| Event Tasks |
All triggers |
| Programs per task |
100 programs |
| No. of safety task |
1 |
| No. of standard task |
31 |
| Maximum Analog I/O |
4000 |
| Maximum I/O |
128000 |
| Non-volatile memory |
1GB |
| Safety Memory |
1MB |
| Product Type |
Programmable Automation Controller |
| Module Type |
Processor Module |
| User Memory |
2 MB |
| I-O Memory |
0.98 MB |
| Maximum I-O |
128,000 |
| Maximum Analog I-O |
4,000 |
| Current Draw (1.2 Volts DC) |
5 Miliamperes |
| Current Draw (5.1 Volts DC) |
800 Miliamperes |
| Power Dissipation |
2.5 Watts |
| Thermal Dissipation |
8.5 BTU per hour |
| Isolation Voltage |
30 Volts Continuous |
| Enclosure |
None (Open-Style) |
Information About 1756-L71S
The 1756-L71S is part of the Allen-Bradley GuardLogix 5570 series within the Logix5000 family, combining ControlLogix performance with advanced safety features. It includes 2 MB of standard user memory, 1 MB of safety memory, and 0.98 MB of I/O memory, along with a pre-installed 1 GB Secure Digital card for non-volatile storage, expandable to 2 GB. For safe system design, it requires pairing with the 1756-L7SP safety partner module, enabling compliance with SIL 3 and Cat. 4/PLe safety standards. Communication is supported through a built-in USB port and optional EtherNet/IP, ControlNet, or DeviceNet adapters, allowing flexible integration into industrial networks. With capacity for up to 128,000 digital I/O points and 4,000 analog I/O points, the controller delivers both scalability and reliability in large automation systems.
Key Features:
- Memory Capacity: 2 MB user memory, 1 MB safety memory, and 0.98 MB I/O memory for reliable program execution.
- Non-Volatile Storage: Ships with a 1 GB Secure Digital card (1784-SD1), expandable up to 2 GB for application backup.
- I/O Support: Handles up to 128,000 digital I/O points and 4,000 analog I/O points for large-scale control tasks.
- Safety Integration: Works with 1756-L7SP safety module to meet SIL 3 and Cat. 4/PLe requirements.
- Communication: Built-in USB port plus optional EtherNet/IP, ControlNet, and DeviceNet adapters for flexible networking.
- Program Handling: Supports 31 standard tasks, 1 safety task, and up to 100 programs per task for structured control.
- Diagnostics: Equipped with a front display for runtime and diagnostic information.
- Energy Management: Uses 1756-ESMCAP or 1756-ESMCAPK energy storage modules, eliminating the need for lithium batteries.
The 1756-L71S delivers the reliability and precision required for high-performance and safety-critical industrial automation.
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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