ITS EKSELANS MSC 585 Serie Manual Del Usuario página 12

3. General voltage feeding
The feeding system of the multiswitches is based in the connection of one (or several)
external power supplies at any multiswitch of the installation. This can be useful to earn
time or having the system protected via a contact breaker.
The provided feeding will flow from that point to all connected active elements
(multiswitches / amplifiers) through the HH (Horizontal High) coaxial cable. It is then
important that this cable remains connected between all cascaded system.
The external power supply has the purpose to feed all multiswitches connected (From
one to all the ones required) and the complementary installation elements, specifically:
• The input LNB(s). There will be uasually one Quattro LNB in the headend (for
multiswitches of 4 satellite inputs) or two Quattro LNBs (in case of multiswitches
with 8 satellite inputs).
• Possible TER+SAT IF amplifiers of 5 and 9 lines, AMP series (AMP 55 and AMP 99).
These will be used in those cases where trunk line amplification is required.
• Possible mast amplifiers for terrestrial signals. These can be fed from the
multiswitch by setting the DC switch "DC PASS" at ON position. By doing so, there
is now voltage at TER IN of the multiswitch and so it remotelly feeds the mast
amplifier connected. It is recommened to set it at OFF position in case there is no
need to feed any active element.
The amplification stages of the multiswitches are fed from the satellite receivers and
only if these are in operation. For this reason, the MSE and MSC multiswitch do offer a
very low power consumption.
Important note: In case of having a long cascade distribution system realized with high
ohmic resistance coaxial cable, it is recommended to distribute the external power
supplies in different points of the cascade.
MULTISWITCHES MSC 585 / MSC 989 SERIES
MULTISWITCHES MSE 58 / MSE 512 / MSE 98 / MSE 912 SERIES
LINE AMPLIFIERS FOR MULTISWITCHES AMP 55 / AMP 99 SERIES
3.1. Power Supply Unit (PSU) choice
EK offers two models of external power supplies that allow amply feeding most of
installations.
Code Reference
071010 FA 2600P
071006 FA 1210
In those installations where the terrestrial mast amplifiers, the LNB(s) and/or the line
amplifierts (AMP series) do require a big demmand of power, it is possible to connect
several power supplies at any point of the installation.
In order to determine the number of required PSUs, it is needed to calculate the overall
current consumption according to the installed elements. In the following table, it is
shown per three different cases, for reference. Consumptions can be found on technical
data of any product:
Code 051009 022015 090001
AM DRO MSC
Reference
311 L 44 G 585
Consumption 70 mA 210 mA 0 mA
Number of installed elements
Case 1 1 1
Case 2 1 2
Case 3 1 2
From this number, we will choice the right model(s) of PSU(s):
Description
12V / 2,6A External Power Supply
12V / 1A External Power Supply
090004 090002 090006 090009
MSC
MSE 58 MSE 912 AMP 99
989
0 mA 0 mA 0 mA 300 mA
1
1
8 1 2
Total
current
consum.
280 mA
490 mA
1.090 mA
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