User guide
Table Of Contents
- Presentation
- Warning
- Copyright
- 1 References
- 2 Packaging
- 3 General presentation
- 4 Characteristics and Services
- 5 Use of the modem
- 5.1 Starting with the modem
- 5.2 Specific recommendations for the use of the modem in vehicles
- 5.3 GSM led of the modem
- 5.4 Echo function of AT commands deactivated
- 5.5 Checking the quality of the GSM reception signal
- 5.6 Verification of PIN code
- 5.7 Verification of modem registration on GSM network
- 5.8 Verification of modem registration on GPRS network
- 5.9 Verification of internal voltages of the modem
- 5.10 Main AT commands (HAYES)
- 5.11 Turning OFF the modem
- 5.12 Updating procedure of the modem
- 6 Trouble Shooting
- 7 Functional description
- 8 Technical characteristics
- 8.1 Mechanical characteristics
- 8.2 Electrical characteristics
- 8.3 Environmental characteristics
- 8.4 Standards/Conformities
- 9 Security recommendations
- 10 Recommended accessories
- 11 Client support
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Descriptions and non-contractual illustrations in this document are given as an indication only.
ERCO & GENER reserves the right to make any modification.
Dct_427_01
7 Functional description
7.1 Architecture
Figure 18 : Functional architecture
7.2 Power supply
7.2.1 General presentation
The modem must be powered by an external DC voltage (+V
DC
) between:
Table 16 : Power supply range
Standard
+6.5V +V
DC
+32V
With battery option
+7.2V +V
DC
+32V
The regulation of the modem power supply is made with a DC/DC internal converter in order to supply all
necessary internal DC voltages.
A correct functioning of the modem in communication cannot be guaranteed if the input voltage (+V
DC
) falls
below 6.5 V or 7.2 V depending on the presence of the battery option or not.