1756-L81E 1756 Series PLC Controller Module 3 MB Ethernet

1756-L81E is a 1756 Series PLC controller module for industrial control systems, machine automation, process control cabinets, production line upgrades, and factory maintenance replacement projects. This model is positioned as a 3 MB user memory controller with built-in Ethernet communication and USB client support, making it suitable for compact to medium automation applications where controller generation, memory capacity, firmware level, and chassis compatibility must be checked before replacement.

The 1756-L81E is commonly used in packaging machines, material handling systems, utility control panels, manufacturing equipment, and industrial PLC system upgrades. It is a practical choice for users who need a modern 1756 platform controller while maintaining compatibility with existing control architecture and PLC engineering software.

Related model variants include 1756-L81E, 1756-L81E-NSE, 1756-L81E-NSEXT, 1756-L81EK, 1756-L81EP, 1756-L81EPXT, and 1756-L81EXT. These variants may differ by no stored energy option, conformal coating, extended temperature rating, process controller version, or environmental configuration. Customers should confirm the complete catalog number, firmware revision, memory size, chassis compatibility, communication requirement, power supply, and original nameplate before ordering. DF Automatic supplies 1756 Series PLC controllers, I/O modules, communication modules, power supplies, chassis, terminal blocks, and industrial automation spare parts for factory maintenance and equipment repair.

Company Profile

DF Automatic supplies industrial automation spare parts, control system components, and replacement parts to customers worldwide.

Our product range covers PLC modules, servo drives, servo motors, variable frequency drives, HMI panels, industrial sensors, pneumatic components, hydraulic components, power supplies, electrical control devices, and industrial communication modules.

These products are used in CNC machinery, packaging equipment, robotics, production lines, water treatment systems, machine rebuilding, equipment maintenance, and other industrial automation applications.

We assist customers with model identification, part number verification, replacement part sourcing, quotation preparation, packing confirmation, and international shipping coordination. Before quotation, customers may provide complete model numbers, order codes, product photos, nameplate information, or technical specifications for verification.

For discontinued, legacy, or difficult-to-source components, we can also help check possible replacement options based on the exact model, hardware configuration, electrical specifications, communication interface, and application requirements.

Our objective is to provide clear product identification, practical sourcing support, reliable order handling, and efficient communication for industrial automation maintenance and spare parts procurement.

Service Scope

• PLC modules, controllers, and control system components  

• Servo drives, servo motors, and motion control components

• Variable frequency drives and AC drives

• HMI operator panels and industrial displays

• Industrial sensors, pressure measurement devices, load cells, and related components

• Pneumatic valves, cylinders, fittings, and accessories

• Hydraulic pumps, valves, cylinders, and control components

• Industrial power supplies, relays, contactors, circuit breakers, cables, and connectors

• Industrial Ethernet, fieldbus, and communication modules

• Legacy and discontinued automation spare parts

• Replacement part identification and model cross-checking

Industries Served

Our products and sourcing services support a wide range of industrial applications, including:

• CNC machinery

• Packaging machinery

• Robotics and automated equipment

• Factory automation and production lines

• Water treatment systems

• Machine building and equipment rebuilding

• Industrial maintenance and repair

• OEM equipment users

• System integrators

• Maintenance companies

• Industrial distributors

Why Choose DF Automatic

Model and Part Number Verification

We check model numbers, order codes, nameplate information, and product specifications before quotation to reduce the risk of incorrect part selection.

Support for Legacy and Discontinued Parts

We assist with sourcing older automation components and checking compatible or replacement options where applicable.

Efficient Quotation Support

Customers can send individual models or complete spare parts lists for quotation and availability checking.

International Order Coordination

We support packing confirmation, shipment preparation, and international logistics coordination according to order requirements.

Flexible Procurement Support

We can handle single replacement parts, urgent maintenance requirements, and larger industrial spare parts purchase lists.

Inquiry Information

For faster product confirmation and quotation, please provide as much of the following information as possible:

• Complete model number

• Part number or order code

• Product quantity

• Product photos

• Nameplate photos

• Required condition

• Technical specifications

• Existing machine or system information

• Destination country or shipping requirements

Important Note

Product availability, condition, price, lead time, configuration, and replacement options depend on the exact model number, part number, order quantity, technical requirements, and current supply conditions.

For products with multiple hardware versions, firmware versions, electrical specifications, communication options, or regional variants, the complete nameplate and order code should be confirmed before purchase.