Ziton ZP3, Установка, эксплуатация и обслуживание

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ZP3 Fire Control Panel
ZP Wiring Guide
ZP3 Fire Control Panel Manual
UD1160.W Iss 6 (25/02/2005)
Page W - 9
I
W
3.3.3 Style C
Single direction wiring, with spurs, provides protection against open circuits and earth
leakage.
Figure 3-3 Style C Address Line Wiring
3.4 Line Isolators
Line isolators are devices installed on the Z-Address line to monitor for short circuits on the
field wiring. These devices keep up to 93% of the line operational in the event of a short
circuit. Line isolation can only be utilised when style A wiring is used. They must be installed
in accordance with the requirements of BS5839 Part 1.
3.4.1 Operation
Isolators are installed on the loop at intervals. The occurrence of a short circuit on the loop
wiring causes the isolators on each side of the short to disconnect the damaged section of
cable. This removes the short from the loop, permitting the remainder of the loop to function
normally.
1 Control Unit 3 Spur
2 Detectors