The detection line module with a 27V converter is a communication interface between the control panel and the line components. The detection lines are powered from an isolated +27V voltage source. 2 surveillance lines (loops) can be connected to the module Up to 250 line elements can be installed on each loop in the line mode set to POLON 6000 and up to 127 line elements in the line operation mode set to POLON 4000. Each detection line has an independently adjustable operating mode. Regardless of the mode of operation,detection lines cooperate with the 4000 and the 6000 series detectors