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Allen-Bradley 1756-L71
Allen-Bradley 1756-L71
Allen-Bradley 1756-L71
· Product image is representative; revision or series may vary. Contact us to request a specific version.

1756-L71

GuardLogix 5570 Conformal Coated Controllers

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  • For indent items, typical turnaround is 1-3 weeks, depending on parts availability and scarcity.

Technical specifications for 1756-L71

  • Product Model
    1756-L71
  • Spare Model
    1756L71 1756-L71/B
  • Product Parameters
    GuardLogix 5570 Conformal Coated Controllers
  • Tariff Code
    8537101190
  • Country of origin
    USA
  • Place of shipment
    Xiamen, China
  • In stock
    1 unit
  • Estimated Shipping Size
    23.3x18.3x5.3cm
  • Manufacturer
    Allen-Bradley
  • Weight
    0.4 kg
  • Non-volatile memory
    1GB
  • No. of task
    32
  • Programs per task
    100 Programs
  • I-O Memory
    0.98 MB
  • User Memory
    2 MB
  • Maximum Digital I-O
    128,000
  • Current Draw (1.2 Volts DC)
    5 milliamps

Description

The Allen-Bradley 1756-L71 GuardLogix 5570 Conformal Coated Controller is a high-performance safety programmable automation controller for integrated standard and safety control within the ControlLogix platform. It combines standard automation logic and functional safety in a single controller architecture, allowing both applications to execute within the same chassis while remaining logically independent.

The controller provides 2 MB of standard application memory and 1 MB of dedicated safety memory, supporting complex machine control, process automation, and safety applications. It is capable of managing up to 128,000 digital I/O points, 4,000 analog I/O points, and 500 controller connections, making it suitable for large distributed automation systems.

As part of the GuardLogix 5570 family, the controller supports integrated motion control, coordinated machine safety, and deterministic execution of continuous, periodic, and event tasks. Communication with field devices is accomplished through optional ControlLogix communication modules supporting EtherNet/IP, ControlNet, DeviceNet, Data Highway Plus, Remote I/O, and SynchLink networks.

Revisions

Revision Part #

Also known as

1756-L71/A
1756-L71-A Rev A
1756-L71/B
1756-L71-B Rev B

Alternative Names

1756-L7I I756-L7I 1756L71 I756L71 1756L7I I756L7I I756-L71

Information

Overview Manuals Application Notes Product Applications Physical Connections & Modules

Features:

  • Integrated standard and safety control platform
  • 2 MB standard user memory and 1 MB safety memory
  • Supports up to 128,000 digital I/O and 4,000 analog I/O
  • Up to 500 controller communication connections
  • Integrated motion support over EtherNet/IP
Allen-Bradley 1756-L71 is a GuardLogix 5570 safety programmable automation controller with conformal coating, for applications in harsh industrial environments with airborne contaminants. The controller is part of the Logix5000 controller family and provides both standard and safety control functions in a single integrated platform.

The 1756-L71 features 2 MB user memory, 1 MB dedicated safety memory, and 0.98 MB I/O memory. A 1 GB secure digital card is pre-installed as non-volatile storage. The controller supports up to 128,000 digital I/O points and 4,000 analog I/O points across 31 standard tasks and 1 safety task. Each task can contain up to 100 programs.

As a GuardLogix controller, the 1756-L71 implements a dual-processor safety architecture. When paired with the 1756-L7SP safety partner module, the system achieves SIL 3 / Category 4 / Performance Level e (PLe) safety ratings. The safety partner is automatically configured within the same project file as the standard controller, eliminating the need for separate safety programming environments.

The 1756-L71 Allen-Bradley GuardLogix 5570 Conformal Coated Controllers may still be available for purchase and support from Amikon Limited beyond End-Of-Life (EOL) by the manufacturer (OEM).
Allen-Bradley 1756-L71 GuardLogix 5570 Conformal Coated Controllers Manuals, Datasheets, Drivers, Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
The conformal coating variant (1756-L71K) provides enhanced protection against corrosive atmospheres, meeting Severity Level G3 per ANSI/ISA 71.04-2013 and Severity Level C4 per IEC 60721-3-5:2018. The coating protects PCB assemblies from airborne contaminants including gases, moisture, and particulates, with a copper corrosion rate tolerance of up to 8.5 microns per year.
The controller includes one built-in USB 2.0 programming port. Optional communication modules support EtherNet/IP, ControlNet, and DeviceNet networks. The 1756-L71 does not support controller redundancy.
The module draws 5 mA at 1.2V DC and 800 mA at 5.1V DC from the backplane, with 2.5 W power dissipation and 8.5 BTU/hr thermal dissipation. Isolation voltage is 30 V continuous for basic insulation. The unit operates from 0°C to +60°C and stores safely from -40°C to +85°C at 5% to 95% relative humidity non-condensing.
  • Water/Wastewater: Regulates chemical dosing pump speeds and effluent valve positioning
  • Oil/Gas/Petrochemical: Manages pressure loops and controls burner gas-feed systems precisely
  • Food/Beverage: Adjusts cooking/mixing temperatures via steam control valves with PID logic
  • Power Generation: Drives steam governor actuators and integrates cooling tower fan speed systems
This content has been produced using multiple sources.Amikon takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
Keying: Insert the plastic key into the slot to prevent incorrect module placement if you are assigning slots.
Energy Storage Module (ESM): The 1756-L71 does not use physical batteries. It uses an internal or attached capacitor-based Energy Storage Module  which ships already installed and handles data retention if power is lost.
Memory Card (SD Card): If you are using an SD card for nonvolatile memory backup, insert it into the slot (beveled corner on top, contacts on the right) until it clicks

Technical notes

The controller installs in any slot of a 1756 ControlLogix chassis and includes a factory-installed 1 GB Secure Digital (SD) card for firmware storage and application backup. A removable Energy Storage Module (ESM) preserves controller memory during power interruptions and supports secure operation depending on the selected ESM version. Local programming and maintenance are performed through the integrated USB 2.0 port

FAQs

  • What are the memory capacities?

    +
    The 1756-L71 features 2 MB of user memory and 0.98 MB of I/O memory. It also includes 1 GB of non-volatile memory (SD card) for project storage.
  • Does it require a battery?

    +
    No. The 1756-L71 uses an Energy Storage Module (ESM) instead of a battery to save the program to non-volatile storage during power loss.
  • What is the user memory capacity?

    +
    It features 2 MB of User Memory and 0.98 MB of I/O Memory, making it ideal for standard logic and moderate-complexity systems.
  • Does it have an embedded Ethernet port?

    +
    No. It relies entirely on a USB 2.0 port for local programming. To connect it to EtherNet/IP, you must use a dedicated network bridge module .
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Disclaimer: Amikon Limited sells new and surplus products and develops channels for purchasing such products. Amikon Limited is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because Amikon Limited is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. Amikon Limited is not an authorized distributor, dealer, or representative of the products displayed on this website. All product names, trademarks, brands, and logos used on this website are the property of their respective owners. The description, explanation, or sale of products with these names, trademarks, brands, and logos is for identification purposes only and is not intended to indicate any association with or authorization from any rights holder.
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