Allen-Bradley 1756-L72S Controller Module

Series#: AllenBradley

Product Details

1756-L72S – High-performance ControlLogix 5572S safety controller for SIL 3 applications.
Built-in safety functions: redundant processor, diagnostics, and dual-channel I/O support.
Supports up to 32,000 safety I/O points and 2 MB safety application memory.
Seamless integration with ControlLogix 1756 backplane and Studio 5000 environment.
Hot-swappable design minimizes downtime in critical safety systems.
Ideal for process safety, machinery safety, and emergency shutdown (ESD) systems.
100% Original product. We provide efficient, traceable, and secure global shipping solutions.

Specification

The 1756-L72S is a flagship safety controller from the Allen-Bradley ControlLogix 5572S family, engineered for high-integrity safety applications requiring SIL 3 certification per IEC 61508. This controller combines robust processing power with redundant safety architectures, making it suitable for complex safety instrumented systems (SIS) in oil and gas, chemical, power generation, and heavy machinery sectors. With 2 MB of dedicated safety memory and support for up to 32,000 safety I/O points, the 1756-L72S provides deterministic execution of safety logic while maintaining seamless communication with standard ControlLogix modules over the 1756 backplane. Its hot-swappable design and comprehensive diagnostic capabilities ensure maximum uptime and compliance with global safety standards. Below are the detailed technical specifications derived from industry-standard reference data.

Parameter	Specification
Model Number	1756-L72S
Product Type	ControlLogix 5572S Safety Controller
Processor Architecture	32-bit RISC, dual-core with safety co-processor
Safety Integrity Level (SIL)	SIL 3 per IEC 61508, PL e per ISO 13849
Safety Application Memory	2 MB (non-volatile)
Standard Application Memory	4 MB (non-volatile)
Safety I/O Capacity	Up to 32,000 safety I/O points (discrete and analog)
Maximum Safety Tasks	32 (priority-based)
Safety Task Execution Time	1 ms minimum (typical)
Backplane Interface	ControlLogix 1756 backplane (up to 8 slots)
Communication Protocols	EtherNet/IP, ControlNet, DeviceNet (via add-on modules)
Redundancy Support	Yes, redundant chassis configuration (1756-RM2 required)
Diagnostics	Built-in watchdog, memory CRC, I/O fault detection, and safety timestamping
Programming Software	Studio 5000 Logix Designer v30 or later (with Safety Add-On Profile)
Power Consumption	5.5 W (typical)
Operating Temperature	0°C to 60°C (32°F to 140°F)
Storage Temperature	-40°C to 85°C (-40°F to 185°F)
Relative Humidity	5% to 95% (non-condensing)
Certifications	CE, cULus, ATEX, IECEx, TÜV Rheinland for SIL 3
Dimensions (H x W x D)	144 mm x 35.6 mm x 134.6 mm (5.67 in x 1.4 in x 5.3 in)
Weight	0.45 kg (1.0 lb)
Warranty	Standard 2-year manufacturer warranty