Ren24
There are at least 3 different 24 channel renard board designs, they are:
Renard SS24
Renard SS24 The Renard SS24 is a 24 channel AC controller with integrated ACSSRs and is frequently available for purchase thru group buys on the site. The Renard Standardized Series (SS) controllers are part of a design effort to standardize the board layouts for Renard based systems and to establish a standardized list of components to use in Renard designs.
Renard 24HC
Ren24HC The REN24HC is a 24 Channel AC controller with integrated ACSSrs and is available for purchase offsite.
Renard 24LV
Renard 24LV The Renard 24LV is a 24 channel DC controller. Is also available for purchase offsite.