Both are listed on se.com to be discontinued on the 31st August. Looks like the replacement is 5500NAC2 [URL]https://www.se.com/ww/en/product/5500NAC2/network-automation-controller%2C-spacelogic-c-bus%2C-bacnet%2C-modbus%2C-ip%2C-6m-din-mount%2C-24v-dc/[/URL]