Zone length is dependent on the Protectowire control equipment being used. Maximum lengths for current production models are as follows:

  • PIM-530 Interface Module: 6,500 feet (2,000m) maximum per zone
  • PIM-120 Interface Module: 6,500 feet (2000m) per zone
  • PIM-230 Interface Module: 6,500 feet (2000m) per zone
  • FireSystem 2000 Series Control Panels: 5,000 feet (1,524m) maximum per zone
  • FireSystem 2600HD Series Control Panels: 5,000 feet (1,524m) maximum per zone
  • SRP-4×4 Control Panels: 10,000 feet (3,048m) maximum per zone