Cusam Coding Intercom User Manual page 22

The section area should be bigger than 0.5mm
electric wire is less than 30M,
The section area should be bigger than 0.75mm
electric wire is less than 50M
The section area should be bigger than 1.0mm
electric wire is less than 80M,
The section area should be bigger than 1.5mm
electric 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 that the line of surveillance requested to the
section area of wire.
★ The unlocks 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.Now you
should connect a relay first,then use the connect of relay to drive the weak
signal lock.
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when the length of
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when the length of
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