HTRI-D Siemens Dual Input Module, Whit Supervision The HTRI-D Siemens Intelligent interface modules are designed to provide the means of interfacing direct shorting devices to the fire alarm control panel (FACP) loop circuit. The HTRI-D Siemens modules provide the most advanced method of address programming and supervision on the market combined with sophisticated control panel communication. Each HTRI-D Siemens interface module incorporates a microcomputer chip, and each interface module achieves the state of an intelligent device through its microcomputer-chip technology, combined with its sophisticated, bi-directional communication capabilities with the FACP. Specifications The Siemens Mode HTRI-series intelligent interface modules are available in three (3) types: Model HTRI-D | -DZ, as well as Models HTRI-S | -SZ and HTRI-R | -RZ, which are both designed to monitor an (N.O) or (N.C) dry contact. The interface module reports the status of the (N.O) or (N.C) contact to the control panel. Model HTRI-S | -SZ can only monitor and report the status of the contact, while Model HTRI-R | -RZ incorporates an addressable Form C relay. The Model HTRI-R | -RZ relay and contact device input are controlled at the same address. For the FACP, the relay and input contact can (more...)