Relay vs Solid-State
From Purgatory Props Tutorials
The difference between relay and solid-state controllers is important to understand to prevent damage to your controllers and devices.
Controller Identification
To identify if your controller is relay based or solid-state based (Aamon series) look at how the outputs are labelled.
Relay controllers will have the following: C, NO, NC Solid-State controllers will have the following: + and -