I see some good deals for a used Apex base unit. If I were to just purchase that would I be able to use the Trident? Eventually I would pick up an EB832 but my main focus now is just getting a Trident. Anyone doing this currently?
As long as the base unit is the current model Apex (2016) or the Apex-EL, it will work with the Trident and any other modules you have. You cannot use the older Apex Classic, Apex Lite, or Apex Jr. with the Trident.
See my Apex Hardware Overview article for more details:
Here's a quick overview of the Apex hardware family: Apex controller (sometimes referred to as the "base module" or "brain") The Apex controller is the primary device that controls and monitors the entire Apex setup. There are two current...