Interconnection - Hard Wired - Ei Electronics Ei603 Instructions Manual

4. Interconnection - Hard Wired

A combined maximum of 12 Smoke Alarms and/or Heat Alarms may be wired
together such that when one unit senses fire all other units sound a warning - (see
Table 1 for the alarms with hardwired interconnect option). This helps ensure the
alarm will be heard throughout the property.
Do not connect to any other device as it may damage the unit or affect performance.
1 2
Figure 9a
A maximum of 250 metres of two core, 0.5mm
can be used, (maximum resistance between detectors 50 ohm). The Alarms are
interconnected by wiring all the terminals marked 1 together, and all the terminals
marked 2 together (see in Figure 9a). Note: Draughts from wiring openings, conduit,
or mounting boxes/holes, may blow smoke away from the sensing chamber,
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OPENING IN
MOUNTING PLATE
1 2
to 0.75mm
2
17
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Figure 9b
, stranded signal cable
2