It looks like Smarthome is in the process of discontinuing the 2412S Serial PLM. A search for 2412S now takes you to their Discontinued Products page and the suggested replacement is the new Dual Mesh 2413S Serial PLM.
Few points. It does not provide unfiltered 12 volts on the interface jack. So ISY99i users will now have to get an external power supply wart to power it and it has half the Link Database Size. 2016 for the 2412S and 1023 for the 2413S.
http://www.smarthome.com/manuals.html
There was an active link in the 2412U page to the 2412S module and it still showed in stock. I decided to cover my butt and ordered a spare while it was still available.
Few points. It does not provide unfiltered 12 volts on the interface jack. So ISY99i users will now have to get an external power supply wart to power it and it has half the Link Database Size. 2016 for the 2412S and 1023 for the 2413S.
http://www.smarthome.com/manuals.html
There was an active link in the 2412U page to the 2412S module and it still showed in stock. I decided to cover my butt and ordered a spare while it was still available.