Allen Bradley 1756-L72K ControlLogix Controller

The Allen Bradley 1756‑L72K is a mid-range ControlLogix 5572 controller with conformal coating.

Technical Specifications

• Model: 1756‑L72K
• User Memory: 4 MB
• I/O Memory: 0.98 MB
• Ethernet: None (optional adapter modules supported)
• USB Port: USB 2.0 for local programming
• Motion Axes Supported: Up to 100
• Non‑Volatile Storage: SD card (optional)
• Power Consumption: ~5 mA @ 1.2 V; ~800 mA @ 5.1 V
• Dimensions: 5.00 × 18.01 × 21.996 cm; Weight ~0.40 kg
• Operating Temp: 0–60 °C; Storage: –40–85 °C
• Certifications: UL, CSA, CE, ATEX, IECEx, FM, KC, RCM
• Conformal Coating: Yes
• Lifecycle Status: Active

Key Features

• Robust 4 MB user memory suitable for mid-sized applications
• Embedded conformal coating protects against moisture and debris
• USB port enables convenient local programming
• Supports up to 100 motion axes for motion control applications

Compatible Components & Accessories

• ControlLogix 5570/5580 chassis and 5 V power supplies
• Optional communication modules (EtherNet/IP, ControlNet, DeviceNet)
• Studio 5000 Logix Designer and PanelView Plus HMIs
• Secure Digital (SD) memory cards for program backup

Industry Applications

• Packaging, material handling, and general machine automation
• Batch process control and utility systems
• Environmental monitoring systems requiring rugged controllers

Installation & Maintenance Notes

• Install in ControlLogix chassis with proper grounding and shielding
• Use USB port for programming only; disconnect when not in use
• Insert or remove SD cards only when power is off
• Maintain conformal coating by keeping any unused ports sealed

Frequently Asked Questions