This range of interface relays are available in 12V and 24V versions and provide 4, 8 or 12 individually fused outputs - dependant on model. Each output is selectable to be either permanently on, or switched via a remote signal from a Fire Panel or other control device. The remote signal can be either dry contacts (NO / NC) or a low voltage input. Typically used in Access Control applications to remove power from locks while maintaining power to the ACU on a Fire Alarm activation.