Allen-Bradley ControlLogix 1756-L71 2MB Processor Module

Overview
The 1756-L71 from Allen-Bradley is a high-performance ControlLogix programmable automation controller (PAC) designed for advanced industrial applications. It provides 2 MB of user memory and supports full redundancy and integrated motion control. This module is ideal for complex control, data acquisition, and motion integration tasks.

Technical Specifications

• Manufacturer: Allen-Bradley

• Product Line: ControlLogix

• Part Number: 1756-L71

• Product Type: Programmable Automation Controller (PAC)

• Weight: 1.00 lbs (0.45 kg)

• Maximum Analog I/O: 4,000 points

• Maximum Digital I/O: 128,000 points

• Module Type: Processor Module

• User Memory: 2 MB

• Non-Volatile Memory: 1 GB (included)

• Number of Tasks: 32

• Programs per Task: 100

• Event Task Triggering: All triggers supported

• Built-in Communication: 1 USB port

• Optional Communication Adapters: EtherNet/IP, ControlNet, DeviceNet, DH+, Remote I/O, SynchLink, third-party networks

• Redundancy: Full support

• Integrated Motion Options: SERCOS interface, analog encoder input, LDT input, SSI input, motion on EtherNet/IP network

• I/O Memory: 0.98 MB

• Current Draw: 5 mA at 1.2 VDC; 800 mA at 5.1 V

• Power Dissipation: 2.5 W

• Thermal Dissipation: 8.5 BTU/hr

• Isolation Voltage: 30 V continuous

• Enclosure: Open

• Supported Communication: DeviceNet, ControlNet, EtherNet/IP, Remote I/O

Key Features

• High Performance: Supports up to 128,000 digital I/O points and 4,000 analog I/O points

• Advanced Memory: 2 MB user memory with 1 GB non-volatile memory

• Integrated Motion Control: SERCOS, encoder, SSI, and LDT inputs with EtherNet/IP motion integration

• Flexible Networking: Built-in USB and optional adapters for multiple industrial networks

• Redundancy Support: Full redundancy capabilities for mission-critical applications

• Efficient Thermal Management: Low power consumption with minimal heat generation

Applications

• Complex process control and automation

• High-speed data acquisition and processing

• Integrated motion control in manufacturing systems

• Redundant industrial control environments

FAQs

Q: What networking protocols are supported by this controller?
A: 1756-L71 supports EtherNet/IP, ControlNet, DeviceNet, DH+, Remote I/O, SynchLink, and select third-party networks.

Q: How much memory does it offer for user applications?
A: It provides 2 MB of user memory and 1 GB of non-volatile memory.

Q: Does it support integrated motion control?
A: Yes, it supports SERCOS interfaces, analog encoder inputs, LDT inputs, SSI inputs, and motion control via EtherNet/IP.