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Allen-Bradley 1756-L71 ControlLogix 2 MB Controller

Allen-Bradley 1756-L71 ControlLogix 2 MB Controller

Item NO.: 1756-L71
Inquiry

Warranty: 1 year 


Condition : brand new in factory sealed box


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Detail

  • Product NameAllen-Bradley 1756-L71 ControlLogix 2 MB Controller
  • Item NO.1756-L71
  • Weight1.0000 kg = 2.2046 lb = 35.2740 oz
  • CategoryPLC
  • BrandAllen-Bradley
  • Creation Time2025-10-27
CONTROLLOGIX 5570 | 2 MB USER MEMORY | USB PROGRAMMING

Allen-Bradley 1756-L71 ControlLogix 5570 Controller

A standard ControlLogix 5570 controller with 2 MB user memory and Secure Digital nonvolatile storage.

BrandAllen-Bradley / Rockwell Automation
Model1756-L71
Product TypeControlLogix 5570 Controller with 2 MB Memory
01

Overview

1756-L71 is a standard ControlLogix 5570 controller with 2 MB of user memory and 0.98 MB of I/O memory. It installs in a 1756 ControlLogix chassis and uses separate communication modules for plant networks.

1756-L71 is not the 1756-L71S GuardLogix safety controller. Preserve the series, firmware major revision, project version, electronic keying and installed energy-storage module when replacing a controller.

02

Specs

Manufacturer Allen-Bradley / Rockwell Automation
Model 1756-L71
Product Family ControlLogix 5570
Product Type Standard controller
User Memory 2 MB
I/O Memory 0.98 MB
Nonvolatile Memory 1 GB 1784-SD1 Secure Digital card supplied with the controller
Local Programming Port One USB client port
Embedded Network Port None
Maximum Digital I/O 128,000
Maximum Analog I/O 4,000
Controller Tasks Up to 32
Controller Connections Up to 500
Motion Capacity Up to 100 axes supported by the controller family configuration
Energy Storage Module 1756-ESMCAP removable capacitor module supplied with the controller
Power Dissipation 2.5 W at full load
Backplane Current 5 mA at 1.2 VDC and 800 mA at 5.1 VDC
Lifecycle Status Active Mature
Important Distinction 1756-L71 is standard control; 1756-L71S is the safety controller
03

Features

  • Executes Logix Designer applications with modular ControlLogix I/O and communication modules.
  • Uses Secure Digital media for controlled nonvolatile project storage.
  • Provides a four-character alphanumeric status display for controller diagnostics.
  • Supports redundancy and motion applications when the complete architecture and firmware are qualified.
04

Applications

  • Machine and process control in established ControlLogix 5570 systems.
  • Redundant controller applications with approved companion hardware and firmware.
  • Coordinated motion systems within the documented axis and network design.
05

Lifecycle

  • Archive the Studio 5000 project, tags, add-on instructions, recipes and SD-card image.
  • Record series, firmware, chassis slot, communication modules and redundancy partner.
  • Confirm compatible Logix Designer software and module electronic keying before download.
  • After exchange, validate ownership, I/O, produced/consumed tags, motion, alarms, time synchronization and restart sequences.
06

FAQ

Can 1756-L71 replace a GuardLogix 1756-L71S?

No. 1756-L71 is a standard controller and does not provide the GuardLogix safety function or safety partner architecture.

What must match before loading an existing project into 1756-L71?

The controller series, major firmware, Logix Designer project, chassis modules, electronic keying and any redundancy requirements must align.

Why is the SD card important when sourcing 1756-L71?

It may contain the approved nonvolatile image and load settings; obtain or recreate that controlled image rather than assuming any card is current.

Can 1756-L71 communicate on EtherNet/IP without another module?

No embedded network port is provided. The chassis needs the appropriate ControlLogix communication module and restored network configuration.

What information supports a reliable 1756-L71 quotation?

Provide series, firmware, project version, chassis and communication modules, redundancy use, motion axes, energy-storage code and required test condition.

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