Figure
Control Unit
with monitor
and commutator
in a video doorphone for
subscribers
4 -
BUD
MV
-420М
VIZIT-M430С
-4
200
BK
Power Supply Unit
-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
1
2
3
4
6
7
-Ohms resistor shall be connected between
in the circuit
VO
VG
-4MV
82
and
terminals of the last
BK
T
o
monitors
in
apartments
LN-
GND
LN+
VI1
+E
DATA
Ec1
Ec2
GND
VI2
VIZIT-M430C
Monitor
Power Supply Unit
Commutator
- V
BK M
-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
LN-
GND
LN+
VI1
+E
DATA
Ec1
Ec2
GND
VI2
VIZIT-M430C
Monitor
82
LINE
GND
SEL1
Ek
USE
Evk
GND
GND
SEL0
1 2 3 4
6 7
1
2
3
5
6
7
!
!
5
See Fig.1-3
Control Unit
BUD-420M
Doorstation
-431DXKCB
(
-432RCB)
BVD
BVD
(To apartments
with
hundred)
odd
(To apartments
with
hundred
even
)
- V
Commutator
BK M
7