Johnson Controls 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™ 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. As are all System 350 products, the stage modules are housed in NEMA 1, high-impact thermoplastic enclosures. The modular design provides easy, plug-together connections for quick installation and future expandability