Description

Allen‑Bradley 1756‑L73XT (ControlLogix XT Controller) Overview
1756-L73XT is an XT-type high protection PAC/PLC controller from Rockwell Automation (Allen-Bradley) ControlLogix series. It is mainly designed for wide temperature range, three-proof coating, and suitability for extreme environments, and is used in large-scale, highly reliable industrial control systems.

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Basic parameters
Brand: Allen‑Bradley
Model: 1756-L73XT
Series: ControlLogix L7XT (Enhanced for Harsh Environments)
User Memory: 8 MB
I/O Memory: 0.98 MB
Maximum I/O Points: 128,000 Digital / 4,000 Analog
Operating Temperature: -25°C ～ +70°C (Regular L7 ranges from 0–40°C)
Storage Temperature: -40°C ～ +85°C
Humidity: 5–95%, no condensation
Power Consumption: 2.5 W (8.5 BTU/hr)
Current: 5.1V DC 800 mA; 1.2V DC 5 mA
Isolation: USB ↔ Backplane 30V continuous isolation, withstands 500V AC/60s
Local Ports: 1×USB 2.0 (Programming / Debugging)
Non-volatile Storage: SD card optional (up to 1GB)
Backup Power Supply: 1756-ESMCAPXT Supercapacitor (non-replaceable battery)
Size / Weight: 1 slot, approximately 0.25 kg
Protection: **conformal coating triple protection coating**, corrosion-resistant, moisture-proof, dust-proof
Certifications: UL, CE, ATEX II 3G Ex nA IIC T4 X, etc. Core feature

Extreme environment adaptation: wide temperature range + triple protection coating, can be directly used in outdoor, mining, metallurgy, oil and gas, and low/ high temperature workshops.
Large system capability: 8MB memory + supports 128k I/O, suitable for large assembly lines, multi-axis motion, and process control.
Redundancy and communication: supports controller redundancy; natively supports EtherNet/IP, ControlNet, DeviceNet, DH+, Remote I/O, SynchLink, etc.
Maintenance-free design: uses super capacitors instead of batteries, no need to replace batteries, more reliable for long-term operation.
Seamless integration: standard ControlLogix backplane, can be mixed with ordinary 1756 I/O and FLEX I/O-XT. Typical application
Oil and gas platforms, refineries, chemical plants (explosion-proof / corrosion-resistant areas)
Metallurgical hot rolling / cold rolling, mining crushers / conveyors
Outdoor water treatment, energy, rail transportation
Low-temperature cold storage, high-temperature kilns, extreme working condition production lines