Any system sirens must be connected to the terminals +S INT (indoor siren) and +S EXT (outdoor siren) on the control panel.
The siren parameters must be set in the section “Relays > Relay 1” in the By-alarm Manager software. In addition to the general parameters of “Relay 1” you must define which zones generate the relay in the event of active system unbalancing in “Activation by zone”.