GUIDELINE FOR ESTIMATION OF ACCEPTABLE NUMBER
OF MONITORS AND COMMUTATORS
The unit is capable to continuously provide current of 0.8 А
+24
+12
.
operates
intermittent load, for a monitor is activated for a period of no more than 100 seconds. Several
monitors may be activated simultaneously.
,
+24
:
-
:
х 25
=
(0
А);
-
:
х 45
=
(
А).
х 8
=
(0 0 А).
:
-
: 0
А + 0 0 А = 0 1 А (
;
-
:
А + 0 0 А =
1 А
24/12-1-1
-М427С
24/12-1-1
24/12-1-1
24/12-1-1
in
V circuit, with no load in
V circuit
Up to 18 minutes - 1A is allowed. Up to 3 minutes - 1.2A is allowed. Up to 2 minutes - 1.4A is allowed.
The unit
at
In this case current consumption of monitors at supply voltage of
V is equal to
stand-by mode 15
mA
375 mA
.38
all monitors are on 15
mA
675 mA 0.68
Current consumption of commutators is equal to: 4
mA
32 mA
. 3
Total current consumption of monitors and commutators makes
stand-by mode
.38
. 3
.4
allowable continuous load)
all monitors are on 0.68
. 3
0.7
.
Where it is necessary to connect a larger number of monitors, an additional BPD
unit(s) shall be applied to
supply power to specific groups of monitors. In case additional power supply units are applied, their GND (ground)
terminals shall be connected together.
For instance, to feed 30 monitors VIZIT
it is recommended to use two units BPD
. Each unit BPD
connects 15 monitors. An example of configuration with two units BPD
is given on Figure 8.
1. Load carrying capability of
power supply unit
.
2. Standard current consumption of monitors and
at
+24V.
24/12-1-1
.
(
The allowed number of monitors and commutators within a multi-apatrment video doorphone depends on current
consumption of monitors and commutators. Estimation of total current consumption of connected monitors is highly
important, for all the load falls on the regulated group power supply unit
the
commutators
supply voltage of
One unit BPD
is capable to feed
monitors
and
commutators
allowable continuous load)
BPD
Reference
Example of calculation
15
VIZIT
BK MVE
24/12-1-1
.
PBD24/12-1-1
.
-М427С
4
-4
SPECIFICATIONS
Max. number of connected monitors or apartment handsets
Operating voltage
Current consumption at
circuit, no more than
Interrupting current for monitor power circuit
)
Dimensions (W)x(H)x(D)
Weight
Ambient temperature range
to
Relative humidity of air:
up to
at
UKP
pcs.
VDC
mA
E
.
. A
3 mm
. kg
OPERATING CONDITIONS
+
+
(
:
4
16...28
+Е
8
+
1 2 ± 0 2
75х135х 5
0 2
1°C
40°C
93%
25°C
www.vizit-group.com
BK-4MVE Operating Instruction (revision
6 12
7 8
201 -
)
/
Device
Current consumption mA
,
Stand-by
Monitor screen is on
BK MVE
-4
8
8
VIZIT M
C
- 427
25
45
VIZIT M 4 C
- 4 0
30
1 0
3
VIZIT M 4 CM
- 4 0
30
1 0
3
VIZIT M
C
-
456
27
180
VIZIT M
C
-
456 М
50
140
VIZIT M
- 327
5
40
