1756-L73

Powerful controller 1756‑L73 for large‑scale automation systems

The Allen‑Bradley 1756‑L73 is a high‑performance programmable automation controller (PAC) from the ControlLogix® 5570 family. It features 8 MB of user memory and 0.98 MB of I/O memory, providing support for up to 128,000 digital and 4,000 analog I/O points. Its robust design and high-speed processing make it ideal for demanding industrial control applications that require scalability and reliable performance.

Technical specifications

• Manufacturer: Allen‑Bradley

• Series: ControlLogix 5570

• User memory: 8 MB

• I/O memory: 0.98 MB

• Max digital I/O: 128,000 points

• Max analog I/O: 4,000 points

• Power dissipation: ~2.5 W

• Input current: ~5 mA @ 1.2 V; ~800 mA @ 5.1 V

• Isolation voltage: 30 V continuous, tested at 500 V AC

• Dimensions: approx. 22 cm (L) × 17.9 cm (W)

• Weight: approx. 0.25–0.40 kg

Key advantages

• High I/O capacity for complex automation systems

• Fast processing and large memory for advanced control

• Compatible with wide range of industrial communication protocols

• Compact modular form saves space in control cabinets

• Designed for local and distributed I/O topologies

Application and use cases of 1756‑L73

Ideal for manufacturing plants, process control environments, robotics, packaging systems, and large distributed automation networks. Its scalability and performance make it a preferred controller for both centralized and decentralized automation systems.

About the manufacturer

Allen‑Bradley, part of Rockwell Automation, is a global leader in industrial automation and control technologies. The ControlLogix family is trusted worldwide for its flexibility, reliability, and high integration with industrial systems.