The CNMK is a Cresnet expansion module that provides a PS/2 or USB interface between the Crestron control system and a Windows® based PC. The CNMK allows mouse and keyboard commands to be executed from the control system and sent to the computer to control software applications. Using the CNMK it is possible to display the equivalent of a QWERTY keyboard directly on any large touchpanel to allow manual real-time text entry directly from the touchpanel screen. Select keyboard commands can be assigned to buttons on any handheld remote to control computer-based slide presentations. Macros can be easily programmed to execute a string of commands.

The CNMK includes pass-through connectors to enable the simultaneous connection of a standard or wireless PS/2 keyboard and mouse. The CNMK may also be interfaced to a single USB port on the PC using the PS/2-to-USB Y-adapter included. The CNMK may be rack-mounted using the optional ST-RMK rack mount kit (sold separately). Communication with the control system is via a single Cresnet connection.