Functional Devices PSH100A Enclosed Power Supply 100VA 120-24V

The Functional Devices PSH100A Enclosed Power Supply steps down primary line voltage to supply electricity to low-voltage HVAC control systems and automation components. Mounted inside control enclosures or electrical junction boxes it transforms 120V input power into a 24V secondary output rated for 100VA applications. Wiring terminals connect line voltage to the primary side while delivering regulated low-voltage power from the secondary side to thermostats, relays and field controller. Converting input voltage supplies steady electrical current to sensitive control circuits enabling continuous automation responses and reliable system power distribution.