Allen-Bradley 1756-A17 17-Slot PLC Chassis Rack

Allen-Bradley 1756-A17 is a 17-slot ControlLogix chassis rack that provides the backplane and enclosure for mounting ControlLogix 1756-series I/O modules in large automation systems. This 17-slot chassis is part of the ControlLogix family and is designed to accept a wide range of 1756 I/O modules, offering scalable expansion for complex control architectures. The backplane delivers power and interconnectivity for all installed modules, with a total backplane current rating of up to 15 A at 5.1 V DC and up to 6 A available per slot, enabling mixed-module configurations. When paired with the 1756-PA75 power supply, the system provides the required DC power to the backplane and its modules. This chassis is commonly used to centralize machinery I/O, safety interlocks, and motion-control interfaces within a single ControlLogix stack, mounted in standard industrial enclosures for rugged operation. The 1756-A17 is documented by Rockwell Automation as a 17-slot chassis suitable for 1756-series controllers and modules, making it a foundational component for large, modular ControlLogix installations.