Spec Sheet Preview: The Alpha Communications® NX3301 Keypad Module is designed to be a stand-alone access control keypad. It is used with the Nexa series St. Steel (INOX) door panels and modules. The NX3301 Keypad Module can handle up to 1,000 4,5, or 6 digit entry codes and features a backlit numeric keypad with stainless steel covered push buttons. Each NX3301 can be powered by a separate 12vac power supply, or 18vdc to 24vdc power supply.