Replacement Expander Board for VS520SZ, VS504SZ, & EL2000 Control Systems
Supports an additional 1 speed pump with a 30A fuse. Used with main circuit boards (SKU 54638-01) in 2011-2013 domestic XS series models and main circuit boards (SKU 55804-01) in 2007-2013 domestic Beachcraft, Birch Bay, and Divine 3 pump and 4 pump models.