Allen-Bradley 1756-L63XT ControlLogix-XT Logix5563 Processor Module

Product Summary

The Allen-Bradley 1756-L63XT is an Xtreme Temperature ControlLogix Controller by Rockwell Automation, designed for operation in harsh environmental conditions beyond standard industrial ranges. It delivers the same processing power and memory as the standard 1756-L63 with 8 MB user memory, but rated for extended temperature operation from -20°C to +70°C. This makes it ideal for outdoor installations, uncontrolled environments, and applications where standard controllers would fail due to thermal extremes.

Core Specifications

• Model Number: 1756-L63XT
• Type: Xtreme Temperature ControlLogix Controller
• User Memory: 8 MB
• I/O Capacity: 128,000 digital / 4,000 analog I/O points
• Chassis Slots: 4, 7, 10, 13, 17 (1756 series)
• Communication: RS-232 serial; EtherNet/IP, ControlNet, DeviceNet via 1756 communication modules
• Programming: RSLogix 5000 / Studio 5000 Logix Designer
• Manufacturer: Allen-Bradley by Rockwell Automation

Electrical & Functional Characteristics

• Backplane Current: 1.2 A at 5.1 VDC; 0.014 A at 24 VDC
• Power Dissipation: 6.2 W typical
• Task Types: Continuous, periodic, and event tasks
• Serial Port: RS-232 for DF1, DH-485, or ASCII protocols
• USB Port: Not included (use 1756-ENBT or 1756-EN2T for programming via Ethernet)
• Status Indicators: RUN, FORCE, I/O status, and RS-232 activity LEDs
• Keying: Electronic keying prevents incorrect module insertion

System Integration & Compatibility

• Primary Platform: ControlLogix 1756 chassis
• Compatible I/O: All 1756-series digital, analog, specialty, and safety I/O modules
• Communication Modules: 1756-ENBT, 1756-EN2T, 1756-CNBR, 1756-DNB
• Redundancy: Compatible with 1756-RM redundancy modules for paired chassis configurations
• Software Version: RSLogix 5000 v16 or later / Studio 5000
• Related Parts: 1756-L63 (standard temperature), 1756-L63S (safety), 1756-L64 (16 MB), 1756-L65 (32 MB)

Environmental & Operational Limits

• Operating Temperature: -20°C to +70°C (-4°F to 158°F)
• Storage Temperature: -40°C to +85°C (-40°F to 185°F)
• Humidity: 5% to 95% RH, non-condensing
• Vibration: 2G, 10 to 500 Hz
• Shock: 30G, 11 ms
• Approvals: CE, UL, CUL, ATEX (Zone 2), Marine

Industrial Applications

Widely deployed in oil & gas wellhead controls, pipeline pumping stations, outdoor water/wastewater treatment, mining operations, cold storage facilities, desert solar farms, and any application where ambient temperatures exceed standard 0–60°C controller ratings.

Frequently Asked Questions

What is the difference between 1756-L63 and 1756-L63XT?

The 1756-L63 operates from 0°C to 60°C. The 1756-L63XT is an Xtreme Temperature variant rated for -20°C to +70°C, with enhanced components and thermal design for harsh environments. All other specifications (memory, I/O capacity, software) are identical.

Can I use standard I/O modules with the 1756-L63XT?

Yes — the controller is fully compatible with all 1756-series I/O modules. However, for full system reliability in extreme temperatures, consider using XT-rated I/O modules (e.g., 1756-IB16XT) that match the controller's temperature range.

Does the XT version cost more than standard?

Yes — Xtreme Temperature controllers and I/O modules carry a price premium due to enhanced component screening, wider temperature-rated capacitors, and additional thermal testing during manufacturing.

What are the related part numbers?

• 1756-L63 — ControlLogix, 8 MB, standard temperature (0–60°C)
• 1756-L63S — GuardLogix, 8 MB + 4 MB safety, standard temperature
• 1756-L63XT — ControlLogix, 8 MB, Xtreme temperature (-20 to +70°C) (this part)
• 1756-L64 — ControlLogix, 16 MB, standard temperature
• 1756-L65 — ControlLogix, 32 MB, standard temperature