• Allen-Bradley 1756-L74
  • Allen-Bradley 1756-L74
  • Allen-Bradley 1756-L74
1 3

Allen-Bradley 1756-L74 ControlLogix 16 MB Controller

Allen-Bradley 1756-L74 ControlLogix 16 MB Controller

Description

The Allen-Bradley 1756-L74 is a high-performance ControlLogix controller designed for demanding industrial automation applications. As part of the ControlLogix 5570 series, this controller provides 16 MB of user memory, enabling...

19 people are viewing this right now

Availability: Low stock: 2 left

SKU: 1756-L74
Vendor: Allen-Bradley
Category: PLC Controller
Related Series:

Shipping & Returns

Reliable Worldwide Delivery

  • Carriers: Shipped via DHL, FedEx, UPS, or USPS.
  • Dispatch: Orders processed in 1-2 business days and dispatched within 3-5 business days.
  • Tracking: Full tracking details provided via email upon shipment.

30-Day Money-Back Guarantee

  • Guarantee: 30-day return window for in-stock, factory-sealed products.
  • Condition: Items must be unopened, unused, and in original packaging.
  • Authenticity: We guarantee 100% original and authentic hardware.

Need more details? Read our fullShipping PolicyandRefund Policy.

Authenticity & Warranty

  • Genuine Guarantee: We supply only 100% original, brand-new, and factory-sealed industrial automation parts.
  • Full Coverage: Every component is backed by a 12-month comprehensive warranty from the date of purchase.
  • Traceability: All products come with original factory documentation and accessories for full industrial compliance.

Technical Support & Sourcing

  • Expert Assistance: Our technical team provides free consultation to help you verify compatibility for DCS and PLC systems.
  • Rare Part Sourcing: Specializing in obsolete and hard-to-find components from Allen-Bradley, Siemens, ABB, HIMA, and more.
  • Bulk Inquiries: Contact us at pambo@5gplc.com for volume pricing or customized project quotes.
View full product details

Description

The Allen-Bradley 1756-L74 is a high-performance ControlLogix controller designed for demanding industrial automation applications. As part of the ControlLogix 5570 series, this controller provides 16 MB of user memory, enabling complex logic execution, motion control, and high-speed data processing. It is engineered for seamless integration into the ControlLogix chassis, supporting large-scale I/O configurations and multi-tasking environments.

Features

  • 16 MB user memory for complex application logic and data storage.
  • Supports up to 32 tasks for efficient program execution management.
  • High-capacity I/O support, capable of handling up to 128,000 digital I/O points.
  • Integrated 1 GB non-volatile memory for project backup and data logging.
  • Low power consumption with a power dissipation of 2.5 Watts.

Technical Specifications

Model 1756-L74
User Memory 16 MB
I/O Memory 0.98 MB
Non-volatile Memory 1 GB
Maximum Digital I/O 128,000
Tasks 32
Current Draw (1.2V DC) 5 mA
Current Draw (5.1V DC) 800 mA
Power Dissipation 2.5 Watts

Installation Guidelines

  • Ensure the ControlLogix chassis is powered down before inserting or removing the controller module to prevent electrical damage.
  • Verify that the module is fully seated in the chassis slot and the locking latch is engaged.
  • Maintain adequate ventilation around the chassis to ensure operating temperatures remain within specified limits.
  • Follow standard ESD (Electrostatic Discharge) protocols when handling the module to protect internal circuitry.
  • Ensure all grounding requirements for the ControlLogix rack are met to minimize EMI interference.

FAQ

What is the primary function of the 1756-L74 controller?

The 1756-L74 acts as the central processing unit for a ControlLogix system, managing logic execution, communication, and I/O data processing across the backplane.

Is this controller compatible with other ControlLogix modules?

Yes, the 1756-L74 is designed to operate within the standard ControlLogix 1756 chassis and is compatible with the full range of 1756 I/O and communication modules.

What is the purpose of the 1 GB non-volatile memory?

The non-volatile memory is used for storing the user program, data, and tags, ensuring that the controller retains its configuration and logic in the event of a power loss.