Ziton ZP3, Руководство по установке и обслуживанию

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Appendix A: ZP wiring guide
ZP3 Fire Control Panel Installation, Commissioning, and Maintenance Manual 127
Unshielded cable should only be used where it is impractical to use shielded
cable. An example would be the upgrading of an existing system to a ZP system,
where the cabling is already in place.
When the Z-Address line is used with unshielded cable, the panel should be set
to AVF mode. In this mode, some of the functional responses are deliberately
slowed, in order to maintain data integrity in an electrically noisy environment.
Electrical noise, generated by third party pulsing systems, can transfer into
Z-Address lines if the third-party cables are adjacent to the fire alarm cables.
In some cases, the use of unshielded cable can cause spurious responses.
Under no circumstances must an unconnected screen be left floating
on a cable. If screened cables are used they must be terminated as described
under “Shielding” on page 124.
1. Z-Address lines may be run in steel or plastic conduit or trunking, or fixed to
walls or supports without conduit.
2. Third party or mains power cabling may not be run adjacent to the Z-Address
line or in the same conduit or trunking.
3. The cores of multiple-core cable may be used for several Z-Address lines
from the same panel, as well as ZP approved sounders, and ZP systems DC
control lines.
4. Where multiple-core cable is used, it must only be used for the ZP fire
detection system devices. Third party cabling should not be run inside the
same outer insulation as the fire detection cable. Examples are public
address and intercom systems. Third party cabling includes connections
between ZP interface units and relays, etc. of other systems.
5. Noise generated by an unshielded Z-Address line may cause interference on
third-party systems, such as intercoms.
6. Unshielded Z-Address lines must be separated from high voltage cables by at
least 300 mm, as per BS 5839 Part 1.
7. Unshielded Z-Address lines must be separated from all other cables by at
least 50 mm.
The Z-Address line operates with a two-core loop length of up to 3,000 m when
no high-power devices are used on the line. High-powered devices, e.g. loop-
powered sounders, draw more current and engineering calculation is required for
specific line configurations to make sure that the line resistance through various
sections of the line does not cause the line drive voltage at the end of the line to
drop from 20 V to below the specified detector minimum of 16 V. For current