... Only the highest quality componests have been used in the system,each having passed rigorous reliability test standards.the systemis ... as low as -34c using Emerson’s patented lee-temp system developed for operation in extreme environments. Operation in temperatures ... :1,up-flow plenum 2,smok /fire detectors3,water leakage sensor4,water laeakage belt sensor5,clock card6,RS485 serial interface7,touch ...