The line-type heat detector LIST is comprised of an evaluation unit LISTcontroller, sensor cable SEC 20, as well as connection boxes CBO 20. The LIST system is suited for tunnel and larger conveyor belt systems. Approved by VdS according to EN 54-22 (G 231072), certified according to ATEX for zones 2 and 22. A maximum total cable length of 3500 meters may be connected per unit in normal mode. LISTcontroller and CBO 20 are linked via connection cable CC 20. Relay modules RELMOD allow for configuration of up to 254 alarm zones to signal fault and alarm states to superordinate systems (FACP/PLC). Several open data protocols are available as well, in order to transmit all unit and sensor cable states to a PLC.