Allen-Bradley 1756-A17 is a 17-slot ControlLogix chassis rack designed to be mounted in a standard 19-inch equipment rack and used as the backplane for 1756 modules. Part of the ControlLogix 1756 family, the chassis provides 17 slots for CPUs, I/O, and communications modules, enabling scalable, modular automation architectures. It is catalogued as 1756-A17 and serves as the backbone for power distribution and data routing across installed modules. This backplane-based rack is intended for large ControlLogix systems where many I/O points are required.
