Allen-Bradley 1756-A10 USNT ControlLogix Processor

Allen-Bradley 1756-A10 is a 10-slot ControlLogix chassis that provides the backplane and mechanical frame for a ControlLogix rack, designed to host a processor module and up to nine input/output or expansion modules. The enclosure measures 20 inches wide by 30 inches deep by 8 inches high and is specified as open-frame with horizontal mounting, making it suitable for floor-standing or rack installations in industrial environments. It supports the standard ControlLogix backplane with a high-speed ControlBus and requires 1756-N2 slot fillers for any unused slots, ensuring a continuous backplane signal path across all populated slots. Backplane power and signaling draw are specified as up to about 10 A at 5 V DC and 2.8 A at 24 V DC, with a maximum dissipation around 5 W, reflecting its role as the modular backbone of a ControlLogix rack. In practice, this chassis is paired with a Controller in the 1756 family and a range of I/O modules to create a scalable automation rack, enabling centralized control, synchronized I/O, and straightforward expansion for complex automation tasks.