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 - 1Ais allowed. Up to 3 minutes - 1.2Ais allowed. Up to 2 minutes - 1.4Ais 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
3mm
.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 8201 - ) /
Device
Current consumption mA,
Stand-by Monitor screen is on
BK MVE-4 88
VIZIT M C- 427 25 45
VIZIT M 4 C-40 30 1 03
VIZIT M 4 CM-40 30 1 03
VIZIT M C- 456 27 180
VIZIT M C- 456 М 50 140
VIZIT M- 327 540
