Figure
Control Unit
with two monitors per apartment
connected through commutator
in a multi-apartment video doorphone
5 -
BUD
BKM
-420М
-440
-18V
+18V
V1
FA
LN
VG
V2
FB
LN
VG
V3
FC
LN
VG
GND
LINE
SEL
Ek
VI
VG
VG
V4
FD
LN
VG
VO
T
o
monitors
in
apartments
DA
T
A
Monitor
VIZIT-MT460CM
HS
+
HS
-
LN1-
GND
VI2
+E
LN1+
LN2-
VI1
LN2+
Ec1
Ec2
+E
GND
LN-
GND
LN+
+E
DA
T
A
VO1
HS/MON
EQUIV
A
B
C
VO2
GND
LN-
GND
LN+
VI1
+E
DATA
Ec1
Ec2
GND
VI2
Commutator
-440
BKM
VIZIT-M430C
Monitor
LN-
GND
LN+
+E
VI
AWA
Y
REC
MENU
To next commutator
BK MV
-4
4
3
2
1
1
2
3
4
LINE
GND
SEL1
Ek
USE
Evk
GND
GND
SEL0
1 2 3 4
6 7
5
1
2
3
4
6
7
Apartment
The
terminal of commutators
connecting apartment handsets /
monitors from apartments with
hundred shall be wired up
to the circuit connected to the
terminal of
If there are total 100 apartment
handsets / monitors or less, the
and
terminals of
shall be shorted.
SEL
odd
SEL1
BUD-420M.
SEL0
SEL1
BUD-420M
See Fig.1-3
Control Unit
BUD-420M
Doorstation
-431DXKCB
(
-432RCB)
BVD
BVD
-4 V
Commutator
BK M
8