Conventional fire alarm control panel 16 zone safety system MFP16 is fully compliant with BS5839 part 4. It has a robust metal lid, metal back box, four sounder circuits, head-out fault, end of line units, true three-wire operation of sounder and detector circuits, separate indication of open circuit fault, short circuit fault, sounder fault, battery/ power supply fault, non-latching class change sounder input, latching fire and non-latching fault outputs.