13 / 14
User Manual
Rev. 1.0- 16/11/07
GPSRXNV-01
9. Working Principles
The figures below provide an overview of
GPSRXNV-01
modules and
connections.
Figure 9.1
Following is a brief description of the different module functions; all diagrams and
board layout diagrams are included in the “Technical Schedule” Vol.2.
9.1 Power supply card (PSS1201-01)
The power supply section is composed by a transformer which supplies a voltage
of +12 V for the power supply of analog section and a voltage of +7 V for the power
supply of digital logic section.
In case of absence of network, and in case the switch on the rear panel of the
battery is enabled, the equipment automatically switches the power supply on the
internal buffer battery thus guaranteeing the continuity of the service.
9.2 Interface card (SL041IN1001)
This card performs the following tasksi:
•
Interfacing and control of receiver module (EPSILON BOARD);
•
Interfacing and control of power supply module (SWPSUP0003);
•
Supply and control of LED signalling card;
•
Control of status and alarm indication of equipment made available on the
DB9-M connector.
