1756-L72EROMS | AB | Armor GuardLogix 5570 Safety PAC

Allen Bradley 1756-L72EROMS Armor GuardLogix 5570 Safety PAC

Product Overview

The 1756-L72EROMS (Part Number: 1756-L72EROMS) is a specialized, ruggedized Armor GuardLogix safety controller designed for machine-level control without the need for a traditional electrical cabinet. Combining standard control, safety logic, and high-performance CIP Motion into a single unit, this controller is engineered for on-machine mounting in harsh industrial environments.

Featuring a UL Type 4/4X (IP67-rated) enclosure, the 1756-L72EROMS is equipped with M12 connectors for its four integrated Ethernet ports, supporting Device Level Ring (DLR) redundancy for high network availability. It provides 4 MB of standard user memory and 1.5 MB of dedicated safety memory, facilitating SIL 3 and PLe safety compliance for complex, distributed automation systems in automotive assembly, material handling, and large-scale packaging.

Technical Specifications

The 1756-L72EROMS provides utility-grade specifications for on-machine safety and motion:

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model Number: 1756-L72EROMS

• Product Line: Armor GuardLogix 5570

• Safety Certification: SIL 3 (IEC 61508), PLe (ISO 13849-1)

• Standard Memory: 4 MB

• Safety Memory: 1.5 MB

• I/O Memory: 0.98 MB

• Ethernet Ports: 4 x M12 D-Coded Category 5E (Supporting DLR)

• USB Ports: 1 x USB 1.1 for local programming

• Input Voltage: 24V DC Nominal (Range: 18–32V DC)

• Max Total I/O: 128,000 points

• Motion Support: Integrated CIP Motion (Multi-axis control)

• Enclosure Rating: UL Type 4/4X (Water-tight, Dust-tight, Corrosion-resistant)

• Operating Temperature: 0°C to +60°C

• Weight: 6.80 kg (15.00 lbs)

Key Performance Features

• On-Machine Efficiency: Eliminates the cost and space required for large control cabinets by mounting directly onto the machinery.

• Integrated Safety & Motion: Supports GuardLogix safety functions and high-precision motion synchronization over EtherNet/IP simultaneously.

• Enhanced Redundancy: The "EROMS" designation ensures support for enhanced safety redundancy and dual-port DLR connectivity to maintain system operation during a network cable break.

• Rugged Connectivity: Uses heavy-duty M12 connectors to ensure reliable vibration-resistant electrical connections in high-impact environments.

• Battery-Less Retention: Utilizes an internal Energy Storage Module (ESM) to protect logic and tag data, removing the maintenance overhead of lithium batteries.