Allen-Bradley 1756-L61 ControlLogix 5560 Controller with 2MB Memory

Allen-Bradley 1756-L61 ControlLogix 5560 Controller with 2MB Memory

Price range: $380.37 through $2,631.90

The Allen-Bradley 1756-L61 is a ControlLogix 5561 programmable controller providing 2 MB of data and logic memory with an RS-232 serial communication port. Designed for small-to-medium discrete, motion, and process control applications, it delivers reliable execution speeds for standard industrial automation tasks. It features an onboard RS-232 serial port for direct local programming and ASCII/DF1 device connectivity, alongside CompactFlash card support for non-volatile memory backup. Supported by RSLogix 5000 software, the module supports Removal and Insertion Under Power (RIUP) to maximize uptime during routine chassis maintenance.

$380.37
$2,278.50
$2,631.90
SKU: 1756-L61 Category: Brand:

Description

  • Part Number: 1756-L61
  • Manufacturer: Allen-Bradley
  • Type: ControlLogix 5560 Controller
  • Series: ControlLogix 1756 Series
  • Application: General Purpose Factory Automation
  • Size // Rating: 2 MB User Memory, RS-232 Serial Port
  • Connection Type: RS-232 Serial Port / Backplane
  • Compatibility: Allen-Bradley ControlLogix 1756 System

TCI is not an authorized Allen-Bradley distributor.

Warranty Coverage

This product is backed by a TCI Supply 1 year Warranty.

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Description

The Allen-Bradley 1756-L61 is an entry-tier 5561 Series ControlLogix processor engineered to manage discrete logic, multi-axis motion, and process control in small-to-medium industrial systems. With 2 MB of user application memory, it offers an efficient solution for executing ladder logic, function block diagrams, sequential function charts, and structured text routines within a single-slot chassis footprint.

The controller features a front-mounted RS-232 serial port that supports DF1 full-duplex/half-duplex, DH-485, and ASCII protocols. This enables direct serial communication with programming computers, HMIs, bar code scanners, and legacy industrial hardware. To ensure non-volatile data backup and easy firmware loading, the 1756-L61 accepts optional CompactFlash memory cards (such as the 1756-M12, 1756-M13, or 1756-M14), complementing its internal RAM battery backup system.

Programmed and managed using RSLogix 5000 or Studio 5000 Logix Designer software (up to firmware version 20), the 1756-L61 integrates smoothly with local and remote I/O across EtherNet/IP, ControlNet, and DeviceNet communication networks. Front-panel LED diagnostic indicators allow technicians to quickly assess controller status, battery health, and serial activity. Full Removal and Insertion Under Power (RIUP) support enables safe, hot-swappable installation or replacement without removing backplane power from the active ControlLogix chassis.

Frequently Asked Questions

What is the primary function of the Allen-Bradley 1756-L61 controller?

The 1756-L61 is a ControlLogix 5561 PAC designed to manage discrete logic, process control, and motion control in small-to-medium industrial automation applications.

How much user memory does the 1756-L61 provide?

It features 2 MB of user memory for application programs, logic tags, and operational data storage.

What communication ports are built into the 1756-L61?

The module includes an RS-232 serial port supporting DF1, DH-485, and ASCII protocols for local programming, HMI connections, and peripheral device interfacing.

How does the 1756-L61 handle memory backup during power loss?

It utilizes a replaceable lithium battery (such as the 1756-BA1 or 1756-BA2) to maintain RAM data, and supports optional CompactFlash memory cards for non-volatile program storage.

Which software is required to program the 1756-L61?

The 1756-L61 is programmed using RSLogix 5000 or Studio 5000 Logix Designer software (compatible with firmware versions up to V20).

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