93-509-09 - Issue 2 Rev 2 Page 5 of 20 Copyright Protec Fire Detection PLC
1.2.1 LOOP SHORT CIRCUIT OR LOOP INTERRUPTION
It must not be possible to have a short circuit or interruption in the loop that prevents the indication of a fire
alarm from more than one zone. To comply with this instruction, the installer must fit at least one isolator per
zone. The 6000 series loop has been designed with this in mind and so all addressable sounder bases,
6000/MICCO and 6000/MCP devices have a built-in isolator. Check device literature for other devices with an
isolator. If further isolators are required then loop isolator bases and loop isolation units are available (see table
4).
1.2.2 DELAYS TO OUTPUTS
En54-2:1997 + A1:2006 clause 7.11d states that it must be possible to override the delays and immediately
action the delayed outputs at access level one. Since access level one means that the outer panel door is locked
then if delays are to be used this clause can be met in several ways. If option (3) is chosen then this will affect
the installation.
1
. No delays are programmed for manual call points.
2. System programming permits a second activation to cancel delays and immediately activate outputs thus
allowing any manual call point to be pressed upon confirmation of a fire.
3. Programming at least one manual call point to activate all delayed outputs. This should be placed adjacent to
each 6300 panel and its purpose clearly labelled.
1.2.3 DOUBLE ADDRESSING
‘Double Addressing’, where a detection device and a sounder are assigned to the same address, is not supported
by the 6300 panel.
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