Appendix A: ZP wiring guide
122
ZP3 Fire Control Panel Installation, Commissioning, and Maintenance Manual
externally powered or powered from the Z-Address line. Each line connects to
127 ZP addressable line devices.
Key features of the Z-Address Line are:
• Cabling can be installed in any configuration that suits the building. This
includes loop circuits, tees, spurs, or combinations of styles.
• Cabling can be shielded, for new buildings, or unshielded for retrofitting
systems to existing buildings (see “Rules for using shielded cable” on page
125 and “Rules for using unshielded cable” on page 127 for more details if
required.
• Up to 3,000 metres of two-core cable can be used per loop, depending upon
cable size and provided that no line-powered output devices are connected.
Refer to “Loop length” on page 127 for more details about maximum
permissible loop lengths.
The ZP system can mix looped wiring and spurs on the same addressable circuit.
This provides maximum flexibility and lowest cost during installation. Figure 58,
Figure 59, and Figure 60 show examples of different wiring styles, together with
an outline of the benefits of each.
See Figure 58. Return loop wiring provides protection against open circuits, short
circuits (using line isolators), and earth leakage.
ÿ
1
2
3
1. Control Unit
2. Loop
3. Detectors
See Figure 59. Return loop wiring with spurs provides protection against open
circuits, short circuits (using line isolators), and earth leakage.
Summary of Contents for ZP3
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