Data Sheet AXN/EXT/401 Axon Extender Card Data Sheet Download Resource The file you are trying to access requires you to be logged in as a registered user. Registration is free, sign up today. Username Enter your Curtiss-Wright Defense Solutions username. Password Enter the password that accompanies your username. Forgot password? Don’t have an account? Register here. The AXN/EXT/401 is an extender card, which allows modules contained in an Axonite (AXN/ITE/01U) remote housing to connect to an Axon chassis.