I am looking into automating my town's outdoor warning siren and I'm looking for a bit of guidance as this is a little bit outside of my comfort zone. I'm not sure of the siren but I do know that it is an omni-directional Federal Signal siren. The siren is operational but has been sitting dormant for a number of years due to the fact that the only way to control the siren is by using hard-wired start/stop buttons and that is not generally optimal in the event of a tornado warning. I have a radio and a DTMF decoder picked out and I am going to be using an Arduino with a custom program to handle all of the siren logic (warning time, etc). The only component I was able to access from ground level was the RC-5A control box which I have pictured below. I have searched for a more in-depth manual but have been unable to find one.
From what I understand from the schematic attached to the control box, there are three locations to install on/off control switches. My plan is to have relays from the arduino in place of the start/stop switches. Is this feasible, or is there another way I should be doing this?