Allen-Bradley 1756-L950TSXT ControlLogix 5590 XT Safety Controller

50 MB User Memory | Extreme Temperature XT Build | Functional Safety | 500 EtherNet/IP Devices | 50,000 OPC UA Nodes

The Allen-Bradley 1756-L950TSXT is a top-tier, harsh-environment ControlLogix 5590 XT controller engineered for industrial sites where temperature extremes, vibration, dust, electrical noise, and high availability are part of daily operations.
This XT (Extreme Environment) variant is built for rugged reliability, combining a powerful processing engine with advanced safety capabilities, expanded memory, and massive network scalability.

With 50 MB of user memory, integrated safety, a huge 500-device EtherNet/IP capacity, and support for 50,000 OPC UA nodes, the 1756-L950TSXT supports enterprise-level architectures, real-time data pipelines, and safety-critical applications without compromising speed or uptime.

Key Technical Features

High-Performance PAC Architecture

• 50 MB user memory for extremely large applications, multi-line plants, advanced AOIs, data structures, analytics buffers, and complex motion control.
• Integrated safety functionality suitable for high-integrity process and machine applications.
• Supports multi-task execution: continuous, periodic, event-driven, and external trigger logic.
• Part of the ControlLogix 5590 XT family — designed for heavier loads than standard 5590 controllers.

Extreme Environment (XT) Design

• This model is engineered for sites that exceed standard control cabinet conditions:
• Extended operating temperature range (XT rating)
• Improved thermal tolerance
• Higher vibration resistance
• Conformal coating for corrosive or moisture-rich environments
• Designed for mining, oil & gas, remote energy, desert or sub-zero facilities, and heavy process plants
• The XT construction greatly reduces controller failures caused by environmental instability — ideal for unmanned sites or locations where downtime is extremely costly.

Safety-Rated Control Platform

The 1756-L950TSXT includes built-in safety processing, providing:

• Standard + Safety logic in the same controller
• Safety memory partitioning
• SIL-rated execution (dependent on system architecture)
• Safe EtherNet/IP connectivity with appropriate modules

This makes it suitable for high-risk operations such as:

• Burner management
• Mining hazard zones
• High-pressure process control
• OEM safety-integrated machinery
• Remote sites requiring safety diagnostics over IP networks

Unmatched Communication & Integration Capacity

EtherNet/IP Performance

• Supports up to 500 EtherNet/IP devices — more than double many standard ControlLogix models.
  Perfect for large industrial networks with:
• Drives
• Remote I/O racks
• SCADA/HMI
• Vision systems
• Robotics
• Flow/pressure/level instrumentation
• MES or cloud-connected gateways

OPC UA Built-In

• Handles up to 50,000 OPC UA nodes, enabling native interoperability with:
• SCADA
• DCS
• IIoT devices
• Historian systems
• Predictive maintenance platforms
• Cloud analytics services
• This places the 1756-L950TSXT firmly in the Industry 4.0 / digital-factory category.

High-Availability System Support

• Full ControlLogix redundancy compatibility
• Hot-swap I/O support
• Support for high-uptime architectures using redundant EtherNet/IP and power supplies
• Designed for mission-critical applications where controller failover must be seamless

Certifications

As of 2025-09-11, this controller carries:

• China CCC Certification

(Units manufactured before or after this date may have different markings—always check the product label to confirm exact certifications.)

Typical Applications

Industries

• Mining (CHPP, tailings, conveyors, flotation plants)
• Oil & Gas (wellhead, compressor stations, LNG trains)
• Power Utilities (IEC-compliant substations, generation plants)
• Chemical & petrochemical processing
• Heavy manufacturing & metallurgy
• Wastewater treatment in extreme climates
• Food & Beverage high-speed automation
• Remote environment OEM machinery

Use Cases

• Harsh-environment control systems
• Enterprise-scale EtherNet/IP networks
• Large OPC UA data models
• Safety-integrated machines and process skids
• Multi-system plant automation with high I/O count
• SCADA/MES-connected digital factories
• Remote sites requiring long-term autonomous operation

Why Choose the 1756-L950TSXT?

• Extreme-environment hardware reliability
• Huge memory footprint for complex or multi-line logic
• Built-in safety CPU for simplified architecture
• Massive network capacity (500 E/IP devices)
• Native OPC UA server with 50,000-node capability
• Ideal for Industry 4.0, predictive analytics, edge-to-cloud workflows
• Hardened design reduces lifecycle costs at high-risk/remote sites

1756-L950TSXT