urmet domus 1067/024, Руководство по установке

Страница: 46 / 120

DS1067-063D
46
LBT20064
4.1.2 Calculation of the total absorption of the system
Before proceeding with the installation, it is necessary to know the total absorption of the system in order to be able to
proceed with the control for the sizing of the power supplies and batteries.
The calculation procedure is as follows:

list all the necessary devices, with their quantity and maximum absorption per unit in stand-by (which is all available
from the technical specifications), multiplying then the quantity and the absorption to obtain the partial total for each
type of device;

sum all the partial totals to obtain the subtotal;

add 10% to the subtotal for potential future upgrades;

calculate the total.
The table below illustrates an example of how to calculate the total absorption:
Device Quantity Max absorption: Total
Control panel 1 X 85 mA = 85 mA
Keypads ….. …
X
… mA
=
… mA
Readers
…
X
… mA
=
… mA
Expansion modules
…
X
… mA
=
… mA
Supplementary power supply unit
(Expansion)
…
X 55 mA =
… mA
IR detectors
…
X
… mA
=
… mA
SUBTOTAL
… mA
+ 10% for future upgrades
… mA
TOTAL
… mA
Note :
▪
Magnetic contacts do not absorb electricity.
▪
The self-powered siren, when it sounds, draws electricity from its own battery.
IMPORTANT! To not overload the control panel battery, when the mains power supply is absent, plan to use the
self-powered sirens and optical signals (equipped with their own battery).
IMPORTANT! Make sure the total does not exceed the values shown in Table 4, in order to ensure the required
autonomy.
4.1.3 Using supplementary power supply units
If ever the electricity necessary to power the system should be more than what can be supplied by the control panel (see
Table 5), it is necessary to split the system by using one or more 1067/092 supplementary power supply units.
IMPORTANT! The 1067/092 supplementary power supply unit can be used only with the 1067/032A and
1067/052A systems.
IMPORTANT! In any case, each 1067/092 supplementary power supply unit impacts the control panel absorption
when it comes to its expansion section (55 mA max). Considering the potential detectors and actuators powered
by its oV1 and +V2.
For more information on the supplementary power supply units, see paragraph 5.11 Installation of the 1067/092 .
4.2 CABLE SIZING
The formulas for sizing the connection, audio, and power cables are illustrated below. There are also the criteria to follow
when creating busses and in connecting power supplies/repeaters.
4.2.1 Cables to be used, connections of the shields and installation
For the wiring, use a shielded multipolar cable with 4 or more conductors for anti-intrusion. The conductors that connect
the inputs and the data Bus signals
+D and D must have a minimum gauge of 0.22 mm
2
.
The shieldings can be connected together at the negative pole of the control panel power supply.
If 1067/092, supplementary power supplies are used, the secondary bus shields can be connected together at the
negative pole of the power unit of the 1067/092 supplementary power supply unit.
IMPORTANT! Never connect the cable shields to the earth.
For the audio bus, use a normal telephone wire (twisted pair).
IMPORTANT! When installing the cables, keep the anti-intrusion system cables separate from the electrical
system of the apartment or office (separate ducts).