Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | 1756-L73S |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Type | GuardLogix Safety Controller / Processor |
| Standard Memory | 8 MB |
| Safety Memory | 4 MB |
| Safety Rating | SIL 2 / SIL 3 (IEC 62061), PL e (ISO 13849-1) |
| Backplane Current (5.1 VDC) | 1.2 A |
| Backplane Current (24 VDC) | 5 mA |
| I/O Modules Supported | Up to 128,000 I/O points (depending on chassis/config) |
| Communication Ports | 2 x Ethernet/IP, 1 x USB |
| Integrated Motion | Yes (Servo & Kinematics) |
| Operating Temperature | 0°C to +60°C |
| Certifications | TÜV, CE, UL, cUL, ATEX (depending on system) |
Main Features and Advantages
Integrated Safety and Standard Control
The Allen-Bradley 1756-L73S unifies standard and safety control into a single processor. This eliminates the need for separate safety PLCs, reducing system complexity, programming overhead, and hardware footprint—all while maintaining certified safety integrity.
High Memory Capacity and Performance
With 8 MB of standard memory and 4 MB dedicated to safety logic, the Allen-Bradley 1756-L73S supports large, complex programs including advanced motion control, process automation, and extensive I/O handling. Its fast scan times and high-speed processing ensure deterministic control even in demanding applications.
Seamless Integration with Studio 5000
The Allen-Bradley 1756-L73S is programmed using Studio 5000 Logix Designer, offering a familiar environment for both safety and standard development. Safety tasks are separated and locked with signature tracking, ensuring that safety logic remains protected from accidental modification.
Flexible Communication and Motion Support
Equipped with dual Ethernet/IP ports and a USB port, the Allen-Bradley 1756-L73S supports high-speed communication, device-level ring (DLR) topologies, and motion coordination across multiple axes. Integrated motion makes it ideal for robotic cells, packaging lines, and material handling systems.
Certified Functional Safety
Designed to meet SIL 2 / SIL 3 and Performance Level e requirements, the Allen-Bradley 1756-L73S is certified by TÜV for use in safety-critical applications. It supports safety input, output, and feedback devices, enabling full machine safety architectures from a single controller.
Application Field
The Allen-Bradley 1756-L73S is deployed in a wide range of industries where safety and productivity must coexist. In automotive manufacturing, it controls robotic welding cells, press lines, and assembly stations, ensuring safe interaction between humans and machinery while maintaining high-speed production. Its integrated safety features allow for zone-based control and safe reduced-speed operation during maintenance or manual intervention.In packaging and material handling, the Allen-Bradley 1756-L73S manages conveyor systems, pick-and-place robots, and palletizers, coordinating motion while monitoring safety gates, light curtains, and emergency stops. Its ability to handle complex motion profiles and safety logic in one controller reduces commissioning time and simplifies troubleshooting.The processor is also used in process industries for safety shutdown systems and critical control loops where standard and safety functions must operate in tandem. By using the Allen-Bradley 1756-L73S, engineers can design scalable, compliant safety systems that protect personnel and equipment without sacrificing operational efficiency.
