Designed with both the end-user and installer in mind, the TSM800 is used to control fire doors, which are normally held open by magnetic door holders or similar devices. When activated, either by a fire signal, a fault, or an isolation within the fire door zone, the TSM800 will interrupt the supply to the door holders and the doors under control of the module will close. Additionally, the module has the advanced technology to report the fire if the door fails to close.