Johnson Controls S351AA-1C System 351A Series Humidity Stage Module, Percent RH [New]

Johnson Controls S351AA-1C System 351A Series Humidity Stage Module with Percent RH Scale - The S350A, S351A, and S352A Stage Modules are intended to be used with System 350?äó controls. Each of these stage modules plugs into the respective control module to add multiple-stage capability. These stage modules have Single-Pole, Double-Throw (SPDT) relay output with Light-Emitting Diode (LED) indication.. Johnson Controls. Johnson Controls. S351AA-1C.