TWINFLEX
®
pro² Control Panel Engineering and Commissioning Manual
15
Conventional Device Zones: Z5 - Z8:
In order to use conventional zones a 4 zone conventional expansion card must be used part number
505-0007. For more information on expansion cards see 8 Zone Expansion Card on page 20.
Each zone requires a separate 2-core radial circuit from the control panel to the furthest point of the
zone, to a maximum of 500 metres.
In order to protect against possible data corruption it is important to ensure the following points are
adhered to:
1. The cable screen must be connected to the SCRN terminal at the control panel only.
2. The cable screen must not be connected to earth/ground at any point other than the control
panel (at the SCRN terminal provided, not at any earthing point). Do not connect the
screen to any device back box used other than those supplied by Fike.
3. The cable screen continuity must be maintained at every point of the circuit, using the
terminals provided or a suitable connection block.
4. Do not use a 4-core cable as a circuit zone in and zone out, due to the possibility of data
corruption. It is essential that two 2-core screened cables are used if this is required.
Detector bases with integral continuity diodes must be used. An EOL diode must be fitted on the last
device. Refer to the detector manufactures installation instructions for more details.
If a zone is NOT used it MUST be switched off using the zone status menu in the engineers
programming options.
MAXIMUM NUMBER OF CONVENTIONAL DEVICES PER ZONE MUST NOT EXCEED 20 DEVICES.
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