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Allen Bradley ControlLogix 17-slot chassis for modular rack assembly of CPU, communications, and I/O modules.
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The Allen Bradley 1756-A17 Series B is a 17-slot chassis in the ControlLogix family. It provides the physical and electrical backplane for ControlLogix controllers, communication modules, and I/O modules.
Its larger slot count makes it suitable for centralized racks that combine processor, multiple network interfaces, and mixed digital/analog I/O in one enclosure section.
For panel builders and upgrade projects, the 1756-A17 is selected when slot density and expansion headroom are required without splitting immediately to additional local racks.
Used in high-I/O machine cells and process areas where a single central ControlLogix rack must host CPU, Ethernet communications, motion interfaces, and multiple I/O cards.
Verify required slot count, power-supply sizing, rack layout, module heat load, and future expansion allowance before finalizing chassis selection.
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