Timeguard DCC2 - Manual (Page 5)

4
50cm
165
cm *
135º
50cm
165
cm *
70º
3. Selecting intercom sites and cabling
3.1 Intercom sites
The internal intercom should be located at a convenient position for all potential
users at the height indicated in fi g 3a and at a maximum distance of 70m from
the external intercom. If all the users are signifi cantly above or below average
height then a different mounting height may be considered appropriate.
The external intercom should be sited in an area away from driving rain
and surface water, out of direct sunlight as far as possible and protected by the
minimum of an open porch in a position readily accessible to potential entrants.
It should be mounted at the height indicated in fi g 3b.
Fig 3a
Internal intercom
mounting height
Fig 3b
External intercom mounting
height and coverage
3.2 Cabling
Connection between the internal and external intercoms is by 4 core cable. A
15m length is supplied.
A separation of intercoms up to 100m is possible, refer to section 9
(specifi cations) to see how cable core diameter needs to be increased with
increasing separation.
The cable run should be kept at least 100mm away from any mains cable.
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