CARLO GAVAZZI UWP 3.0, Manual, Page: 39 / 45

How to install an UWP 3.0 system
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1.9 How to size the Carlo Gavazzi DC power supply
The Building Automation system is powered by 24 Vdc nominal (15-30 Vdc)
Since most of the Decentral Dupline® slave modules are powered by the bus, the sizing of the power
supply has to be based on the DIN-rail modules, and among these only the ones powered by 15 to 30
Vdc: the power dimmers and the relay output modules that switch 230 Ac load are powered by 230Vac.
In the table below, the list of devices is given, with the relevant power consumption that has to be
considered in the sizing of the power supply.
Item number Description Operational power
UWP 3.0 Master unit 5.0 W
SH2MCG24 Bus generator 6.5 W
SH2RODC224 Roller blind module for DC motor 3.0 W
SH2ROAC224 Roller blind module for AC motor 3.0 W
SH2INDI424 Digital input module 0.4 W
SH2SSTRI424 Solid state relay output module 0.4W
SH2D10V424 1 to 10V dimmer 0.4 W
SH2UMMF124 Universal mobile modem 5.0 W
The suggested families are: SPDT24xx, SPM3241, SPM4241, SPM5 and SPM5B (battery charger).
According to the power required, the right models has to be selected.
1.9.1 How to calculate the needed power
To calculate the required power, the sum of the consumption of all the Din-rail modules has to be
calculated.
For example, if in an installation the following modules are present, the total consumption has to be
calculated following the column
Consumption in the table below:
Item number Quantity Consumption
UWP 3.0 1 1x 5.0 = 5.00 W
SH2MCG24 2 2x 6.5 = 13.0 W
SH2RODC224 0
SH2ROAC224 4 4x 3.0 = 12.0 W
SH2INDI424 2 2x 0.4 = 0.80 W
SH2SSTRI424 0
SH2D10V424 5 5x 0.4 = 2.00 W
SH2UMMF124 1 1x 5.0 = 5.00 W
Total needed
power 37.80 W
In this case a power supply delivering 40W is the right solution.