A-B 1756-L71 ControlLogix CPU Module

Allen‑Bradley 1756‑L71

ControlLogix 5571 CPU Module (PAC)

Specifications

• User Memory: 2 MB
• I/O Memory: 0.98 MB
• Non‑Volatile Storage: 1 GB SD card (upgradeable to 2 GB)
• Max Digital I/O: 128,000 points
• Max Analog I/O: 4,000 points
• Motion Axes: Up to 100 axes
• Processor: High‑speed multi‑core
• Communication:
  • 1× 1 Gbps EtherNet/IP port (10/100/1000 Mbps)
  • 1× USB 2.0 (programming/backup)
  • Support for ControlNet, DeviceNet, SynchLink
• Backplane Current: 0.8 A @ 5.1 VDC
• Operating Temperature: 0 °C to 60 °C
• Display: 4‑character alphanumeric LED (status/diagnostics)
• Certifications: UL, CE, CSA, Class I Div 2, SIL 3 (with safety module)
• Status: Active

Features

• High‑performance control: Combines PLC reliability with complex data processing; ideal for discrete, process, motion, and safety applications.
• Large I/O capacity: Supports up to 128,000 digital and 4,000 analog points, suitable for large‑scale systems.
• Integrated gigabit Ethernet: High‑speed EtherNet/IP for real‑time communication with I/O, HMIs, and other controllers.
• Onboard diagnostics: Built‑in LED display for quick status checks and troubleshooting.
• Redundancy capable: Supports controller redundancy for high‑availability systems.
• Studio 5000 compatible: Program with Logix Designer; supports structured text, ladder logic, and function block.