Cusam STRAIGHT-WAY INTERCOM User Manual page 15

Straight-way intercom
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The section area should be bigger than 0.75mm
length of wire is less than 50M,
 The section area should be bigger than 1.0mm
length of wire is less than 80M,
 The section area should be bigger than 1.5mm
length of wire is more than 80M,
 General speaking,every 4 to 8 floors should add a power
source for video, at this time,you can let up the section area
of wire suitably.
 There is no special request for the section area of the wire for
surveillance request.
★The unlock circuit of this machine mates to the ordinary
electric controlled lock, if it mate to the electric lock driving by
weak signal like magnetic force lock.,then it may causes to
unlock by mistake.At this time you should connect a relay
first,then use the connect of relay to drive the weak signal lock.
www.cusamintercom.com
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