11
The following points should be observed at all times.
Be sure to observe the following, otherwise operating problems may occur or the quality
of the images and sound may be adversely affected.
•
Use the specified connection cables.
Precautions when connecting
Introduction and Installation
●
Do not connect a door station in relay.
<Monitor station>
<Door station>
<Door station>
●
If using an existing cable, disconnect the monitor station from the 120 V AC power
supply and check the cable length and the loop resistance.
General cable CAT-3 24AWG
Up to 100 m (328 feet)
Loop resistance: 18.4 [
Ω
] or less
General cable CAT-3 24AWG
Up to 100 m (328 feet)
Loop resistance: 18 .4 [
Ω
] or less
(Distance from monitor station to last
sub monitor station)
<Door station>
<Monitor station>
<Sub Monitor station>
Connection cable
•
Connect one end and measure at the
other end using a circuit tester.
(Incorrect)
~
~ ~
~
<Loop resistance>
