I figured out the wiring, I’m posting it here in case someone is interested.
I’m using the Guardline Wireless driveway Alarm (500 ft version) with 2 receivers.
1 receiver inside the house will sound when someone comes in. On the NO & COM connections of the receiver I attached a ZW097 z-wave dry sensor which triggers a push notification through ST as well when someone enters.
1 receiver outside (I have a shed with power alongside my driveway) will also sound simultaneously. The integrated relay will turn a strobe light on (attached to the shed) for a few seconds (integrated timer on the receiver for 1, 5, 10 and 60 sec). This is telling someone entering “we know you are here” - deterrent for uninvited folks.
The second relay is in normally closed position when not powered so current passes from the gate receiver to power the strobe light. In case the other alarms are on, it tells the smart plug to turn the power on. The attached 12 volts trans will power both the light and the relay, which will turn open the gate receiver circuit to prevent both working at the same time. Because the strobe light is wired to both power sources, the second switch of the relay must be used in NO position (switches to closed when the transformer is turned on). If not used it will create the relay to oscillate on/off as long as the gate receiver powers it and the light won’t work.
Parts below:
https://www.amazon.com/gp/product/B00HFZUKGM/ref=ask_ql_qh_dp_hza
https://www.amazon.com/gp/product/B073QTNF9F/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B01DNCU2AO/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B0714N28YT/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1
Plus whatever smart plug.