The LYNX Touch L5100 is a self-contained control panel/keypad, and it cannot be connected to a control panel like the Vista 20P. You also can't use the Lynx Touch Keypad to control Vista Panels. The Lynx Keypad only works for its built-in control panel. Keypads like the 6160 or the Tuxedo Touch were designed for use with the Vista Series Panels (the Tuxedo Touch is not compatible with the Vista 10P). With the Tuxedo Touch, you get all the same features the L5100 keypad offers, plus it works as a Z-Wave controller for all your Z-Wave home automation devices.