Description
The Johnson Controls C450SBN-4 is an SPDT relay that is used in low-voltage HVAC applications. It serves as an electronic switch through which a control signal controls another circuit. It receives a low voltage input of 24 VAC and switches a different circuit depending on that input. This makes it possible to connect different kinds of HVAC equipment with control systems through the use of low-voltage wiring, thus increasing safety and decreasing installation difficulty. The SPDT design implies that the relay can switch current in one circuit to different output circuits.
