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Allen Bradley ControlLogix 1756-A7LXT

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1756-A7LXT

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The 1756-A7LXT from Allen Bradley is designed as an extreme-temperature ControlLogix chassis. It accommodates up to 7 slots and is specifically intended for horizontal mounting in panel applications.

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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 1756-A7LXT

ManufacturerAllen Bradley
Product TypeExtreme-temperature ControlLogix chassis
Product LineControlLogix
Part Number1756-A7LXT
UPC612598554799
Weight1.19 lbs (0.54 kg)
Slot Count7 slots
Mounting OrientationHorizontal mounting only
Installation LocationPanel mounted
Enclosure RatingOpen type, no IP/NEMA rating
Protective CoatingConformal coated boards
Backplane Current @ 1.2 V DC1.5 A chassis supply
Backplane Current @ 3.3 V DC4 A chassis, 4 A per slot
Backplane Current @ 5.1 V DC15 A chassis, 6 A per slot
Backplane Current @ 24 V DC2.8 A chassis, 2.8 A per slot
Maximum Power Dissipation4.5 W heat loss
Isolation RatingDepends on installed modules
Ground Conductor Sizing8 AWG functional, 14 AWG protective
Operating Temperature Range−25 to +60 °C ambient
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The Allen Bradley 1756-A7LXT chassis operates under extreme-temperature conditions, ranging from -25 to 60 °C. This substantial control unit supports a total of seven slots and is restricted to horizontal mounting. It is intended for panel-mounted installations. The chassis features an open-type enclosure and does not have an IP or NEMA classification, making it adaptable to numerous settings with proper precautions.

For enhanced resilience, the unit includes conformal coated boards to shield against environmental challenges. The total backplane current specifications include a 1.5 A supply at 1.2 V DC and up to 15 A at 5.1 V DC, accommodating 6 A per slot. Other voltage ratings stipulate currents of 4 A for both 3.3 V DC at the chassis and per slot, and 2.8 A for 24 V DC.

Maximum power dissipation is indicated at 4.5 W, representing the heat loss capacity of this device. The isolation rating varies depending on the installed modules, which allows for customized configurations to fit specific needs. Proper grounding is achievable with functional conductor sizing set at 8 AWG and protective conductor sizing at 14 AWG. This chassis is well-suited for demanding conditions, providing reliable performance where it is most needed.