GE Security ZP3, Инструкция по установке и обслуживанию

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ZP3 Fire Control Panel Installation, Commissioning and Maintenance Manual
REV 11 (ISS 08/03/2010) Page 103
Z-Address Lines
Function
Z-Address lines connect the Ziton addressable field devices to the panel, such as fire and smoke
sensors, line relays, addressable sounders, extinguishing control units, manual callpoints,
interface units, and line isolators.
Each Z-Address line is a 2-wire circuit, which provides both power and data communication to
the ZP fire and smoke sensors, call points, and addressable input and output interface units.
Some devices, such as the extinguishing control unit, require a separate power supply circuit,
whereas others, such as the ZP754 loop sounder, may be either externally powered or powered
from the Z-Address line. Each line connects to 127 ZP addressable line devices.
Features
Key features of the Z-Address Line are:
Cabling may be installed in any configuration, which suits the building. This includes loop circuits,
tees, spurs, or combinations of styles.
Cabling may be shielded, for new buildings, or un-shielded for retrofitting systems to existing
buildings (see
Rules for using shielded cable on page 106 and Rules for using unshielded cable on
page 108 for more details if required.
Up to 3000 metres of 2-core cable may be used per loop, depending upon cable size and
provided no "line powered output" devices are connected. Refer to
Loop length on page 108 for
more details about maximum permissible loop lengths
Wiring styles
The ZP system can mix looped wiring and spurs on the same addressable circuit. This provides
maximum flexibility and lowest cost during installation. Figure 62, Figure 63 and Figure 64 show
examples of different wiring styles, together with an outline of the benefits of each.
Style A
See Figure 62. Return loop wiring provides protection against open circuits, short circuits (using
line isolators), and earth leakage.
Figure 62: Style A - address line wiring
Legend:
Item Description Item Description
1 Control Unit 3 Detectors
2 Loop