The Crestron C2N-IO Control Port Expansion Module is a compact and professional AV accessory designed to extend the control interfacing capabilities of Crestron automation and control systems. It is commonly used in commercial AV installations, boardrooms, classrooms, and conference spaces to add physical control ports where additional devices such as projectors, displays, lighting controllers, or IR/serial devices need to be directly controlled. Rather than requiring the control processor itself to have every port, the C2N-IO provides additional RS-232, infrared, and relay interfaces via a small, wall-mounted unit that connects to the system over the Cresnet control network.

This module is engineered for professional, permanent installation inside wall boxes or behind touch screens, helping integrators maintain neat systems while expanding functionality. It draws power and communicates over Crestron’s Cresnet bus, eliminating the need for separate power wiring. Crestron’s modular control ecosystem allows this expansion unit to work with a variety of control processors, making it versatile for many AV system architectures.