Chapter 4
Mechanical Layout and Interfaces
4.6.1. Multiple 3G GSM Extension Cards
The eWON Flexy firmware currently supports up to one 3G GSM Extension Card of type
FLXB3202.
The boot process of the Base Unit includes an automated detection of the inserted
Extension Cards. This detection is done sequentially, slot per slot starting from the left to right.
Only the first detected 3G GSM card (the most left one) will be taken into account by the
Flexy firmware. An additional card of the same type will be ignored. Contrary to what
happens when it is inserted in a wrong slot, a 3G GSM card in excess will not alter proper
operation of the Base Unit and other Extension Cards.
4.6.2. Power Requirements
The internal power converter of the eWON Flexy Base units has been dimensioned to cover
a broad range of different combinations of Extension Cards. Users should make sure the
total power demand of the Extension Cards does not exceed the capabilities of the Base
Unit. That is why the notion of “Energy Points” has been introduced.
The Installation Guide IG-014-0-EN “eWON Flexy - Base Units” includes a section giving the
Available Energy Points of each type of Base Unit.
The power requirements of each Extension Card is expressed in Energy Demand Points. This
number is meant to check whether the balance with the Available Energy Points of a given Base
Unit with Extension Cards is OK or not.
3G GSM Extension Card FLB 3202
Energy Demand Points 10
The Installation Guide IG-014-0-EN “eWON Flexy - Base Units” includes examples of practical power
balance calculations.
Page 13 / 17 eWON Flexy 3G GSM Extension Card FLB 3202 | IG 019
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