1756-A10XT | Allen-Bradley | ControlLogix XT Extended Temperature 10-Slot Chassis

Product Overview

The Allen-Bradley 1756-A10XT functions as a ruggedized, 10-slot extended temperature (XT) chassis within the ControlLogix automation architecture. This high-integrity backbone establishes the physical housing and high-speed electrical backplane communication path for ControlLogix XT processors, I/O modules, and specialized network adapters.

Engineered specifically to survive in harsh, unconditioned environments where standard commercial controllers fail, this open-type industrial chassis permits direct installation inside Zone 2 hazardous locations. We deliver this system component exclusively as a 100% brand new, original factory-sealed unit, guaranteeing absolute conformal coating integrity, pristine gold-plated backplane pin contacts, and complete factory compliance certifications out of the box.

Technical Specifications

The following matrix details the mechanical configurations, environmental tolerances, and electrical safety standards of this 10-slot XT chassis:

Engineering Advantages

• Withstands Extreme Thermal and Corrosive Stress: The "XT" design variant features upgraded backplane substrates and localized protection layers that resist extreme temperature fluctuations and aggressive airborne contaminants. This allows processing plants to deploy control nodes closer to hot field processes without encountering thermal-induced system resets.

• Hardened Against Severe Electrostatic Disruptions: Heavy industrial environments generate large static charges through moving machinery and synthetic materials. The 1756-A10XT features heavy-duty internal grounding planes that safely dissipate a 6 kV contact or 8 kV air ESD surge, protecting the sensitive microprocessors running on your inserted I/O and communication modules.

• Simplifies Direct Rear-Panel Mounting Layouts: The chassis integrates heavy-gauge rear mounting tabs to allow swift, secure horizontal fastening directly onto an electrical enclosure backplate. The chassis layout positions modules to utilize natural vertical convection paths, which eliminates the need to pack problematic mechanical cooling fans or active air conditioning units inside dust-tight enclosures.

FAQs

• Can I mix standard ControlLogix modules with XT modules inside this 1756-A10XT chassis?

  Yes, the backplane architecture maintains physical and electrical compatibility with standard 1756 modules. However, installing any standard, non-XT rated module downgrades the environmental and temperature boundaries of the entire chassis cluster to standard commercial limits. To maintain the strict Zone 2 and extended thermal ratings, you must use XT-designated modules and XT power supplies exclusively.

• What specific grounding practices prevent electromagnetic noise from interfering with the backplane data bus?

  Technicians must secure the chassis directly to a clean, unpainted vertical metal backpanel inside the enclosure using internal tooth lock washers to ensure metal-to-metal continuity. Additionally, attach a dedicated, low-impedance copper grounding strap from the primary chassis grounding stud directly to the main cabinet ground bar before powering up the assembly.

• Does this open-type chassis require an external protective enclosure during operation?

  Yes. The 1756-A10XT carries an "Open Type" enclosure rating, meaning it leaves electronic traces and connectors exposed on the top and bottom. To fulfill basic safety certifications and provide protection against moisture, dust, and unauthorized physical tampering, users must house the chassis inside an appropriately rated IP54 or NEMA 4 industrial control cabinet.