Ziton ZP3, Установка, эксплуатация и обслуживание

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ZP3 Fire Control Panel
ZP Wiring Guide
ZP3 Fire Control Panel Manual
Page W - 10 UD1160.W Iss 6 (25/02/2005)
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3.4.2 Schematic
Figure 3-4 Line Isolator usage schematic
3.4.3 Rules for using Line Isolators
1. Isolators should be located on the Z-Address loop either at the beginning and end of
each zone, or at regular intervals.
2. To comply with BS5839 Part 1, no more than 1 zone, or 20 detectors or call points,
must be grouped between two isolators. Other standards allow up to 32 devices
between isolators.
3. A maximum of 16 isolators can be used on each Z-Address loop.
4. The total loop cable resistance must not exceed 75 ohms (37.5 ohms for each positive
and negative leg).
5. The maximum cable resistance between any two isolators, or from the panel to the
first isolator, is 18 ohms for both cores (9 ohms for each positive and negative leg).
6. The Z-Address loop is pulsed at a nominal 20-volts Pk-Pk. When loops are installed
in accordance with this Wiring Guide, then the maximum volt-drop across the loop is
4-volts. This ensures that isolators will always receive a supply of at least 16-volts.
1 Control Unit 3 Isolators
2 Detectors