Siemens HTRI-M Intelligent Device Interface ModuleNOTE: This part is discontinued by the manufacturer. Replace with: XTRI M for Desigo and Cerberus Pro panels only. Siemens' HTRI M Intelligent Interface Module is designed to provide the means of interfacing direct shorting devices to the FireFinder XLS systems DLC loop circuit. The HTRI M monitors a normally open or closed dry contact and reports the contacts status to the control panel. Fully compatible on the same FireFinder XLS and FS 250 circuits