In
st
al
la
ti
on
Installation
11
Video-door intercom for single or multi-family residence with one main bus line with
handsfree video intercom unit 1 7835, 1 7845, or indoor video station 1 7855, 1 7857 with
decentral power supply
Block diagram:
Video-door intercom for single or multi-family residence.
* Please note the red mark – see “Bus connections in the door station” on page
☞
16
.
Circuit diagram:
Video-door intercom for single or multi-family residence.
Note:
The block diagram and circuit diagram apply similarly for indoor video station 1 7855 and handsfree
video stations 1 7835, 1 7845.
1 6477
2
8
2x2
2x2
2x2
1 7573
2
1 6477
UV
2
ED
1 7857
1 6477
2
2
ED
1 7857
1 6477
2
2
ED
1 7857
B0112-0
RiTTO
1 4783
1 4753
1 4760
S0117-2
1 6477
1 6477
1 6477
1 7573
1 4760
RiTTO
1 4783
1 4753
1 7857
1 7857
11
N
L
4
3
2
2
1
1
3 4
a1
21
b
b
b
a2
a3
N
L
2 3
1
2
Va Vb
1
N
L
1 2 3
a b
Vb
Va
52
51
Vb
Va
52
51
ED
ED
1 2 3
ED
N
L
a b
ED
ED
ED
a1
