Allen Bradley 1756-A5XT ControlLogix-XT 5-Slot Extended Temperature Chassis

Product Overview

The Allen Bradley 1756-A5XT serves as the high-durability backbone for ControlLogix-XT systems. This 5-slot chassis provides the physical housing and high-speed communication backplane for XT-series processors and I/O modules. Specifically engineered for extreme environments, the 1756-A5XT handles wider temperature swings and harsher atmospheric conditions than standard industrial hardware. We offer this unit as 100% Brand New, factory-original, and ready for deployment in mission-critical infrastructure.

Technical Specifications

The 1756-A5XT integrates a reinforced backplane with specialized protective coatings to maintain signal integrity under stress.

Engineering Advantages

• Extended Thermal Performance: Unlike standard chassis rated for 60°C, the 1756-A5XT operates reliably up to 70°C. This expanded range eliminates the need for expensive enclosure cooling systems in hot climates or high-heat processing zones.

• Superior Atmospheric Protection: Factory-applied conformal coating shields the backplane circuitry from moisture, salt spray, and corrosive chemical vapors. This hardware hardening prevents "dendrite growth" and short circuits in oil and gas or wastewater applications.

• High-G Mechanical Stability: The chassis withstands shocks up to 30 G and continuous vibration of 2 G. These ratings ensure that modules remain securely seated and communication remains uninterrupted even when mounted near heavy stamping presses or on mobile skids.

• Robust Grounding Architecture: The chassis accommodates 8 AWG solid or stranded copper wire for functional earth ground. This high-capacity grounding path effectively dissipates electromagnetic interference (EMI) and protects sensitive electronics from electrostatic discharges up to 8 kV.

FAQs

• What is the difference between the 1756-A5 and the 1756-A5XT?

  The "XT" designation signifies "Extended Temperature." The 1756-A5XT features conformal coating and components rated for -25 to 70°C, whereas the standard 1756-A5 is only rated for 0 to 60°C and lacks standard conformal protection.

• Can I install standard ControlLogix modules in this XT chassis?

  Yes, the 1756-A5XT accepts standard 1756 modules. However, the system's overall environmental rating will only match the "weakest link." To maintain the full XT-grade temperature and corrosion resistance, you must use XT-series modules throughout the chassis.

• How does the power dissipation affect my panel design?

  The chassis dissipates a maximum of 4.4 Watts. When calculating your enclosure's heat load, add this value to the dissipation ratings of all installed modules to ensure the internal temperature stays within the -25 to 70°C operating window.

• What mounting orientation does this chassis require?

  The 1756-A5XT requires horizontal mounting on a back panel. Horizontal orientation ensures optimal natural convection cooling for the installed modules, preventing localized hotspots that could trigger thermal shutdowns.