ZP3 Fire Control Panel Installation, Commissioning and Maintenance Manual
Page 104 REV 11 (ISS 08/03/2010)
Style B
See Figure 63. Return loop wiring, with spurs, provides protection against open circuits, short
circuits (using line isolators), and earth leakage.
Figure 63: Style B – address line wiring
Legend:
Item Description Item Description
1 Control Unit 3 Loop
2 Detectors 4 Spur
Style C
See Figure 64. Single direction wiring, with spurs, provides protection against open circuits and
earth leakage.
Figure 64: Style C – address line wiring
Legend:
Item Description Item Description
1 Control Unit 3 Spur
2 Detectors