User guide

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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 modifications.
Dct_427_00
8.2 Electrical characteristics
8.2.1 Power supply
Table: Electrical characteristics without battery option
Power supply range
- 5.5V à 32V DC (GSM ou DCS ou GPRS)
Average consumption
- GSM 900 MH : 109 mA @ 12V in communication
- GSM 1800 MHz : 97 mA @ 12V in communication
- Idle mode : 18 mA @ 12V
Once the power supply is connected, the modem is permanently consuming.
The following table describes the consequences of over-voltage or insufficient voltage on the modem.
Table: Effects of a power supply defect
Then :
 Voltage falls below 5.5V
 The functioning and the GSM communication are not
guaranteed.
 Voltage above 32V
(Punctual peaks )
 The modem guarantees its own protection.
 Voltage above 32V
(Continuous over-voltage )
 The modem is protected by the fuse
(The modem is short-circuited by an internal surge
suppressor ).
The following tables show the modem consumption without the RS232 connected.
Table 1 : Power supply consumption (1*) with RS232 disconnected and without battery option
CONDITIONS 850 MHz 900 MHz 1800 MHz 1900 MHz
T=25°C et carte SIM 3V I Nom.(mA) I Nom.(mA) I Nom.(mA) I Nom.(mA)
Idle mode (2*) @ 5,5V 33 33 33 33
@ 12V 18 18 18 18
@ 24V 11 11 11 11
@ 32V 10 10 10 10
In GSM communication @ 5,5V 261 259 231 221
1RX/1TX, Full Power @ 12V 129 128 115 110
@ 24V 69 69 62 60
Power (2W/1W) @ 32V 55 55 50 48
In GPRS CL10 communication @ 5,5V 370 372 310 298
2RX/2TX, Full Power @ 12V 174 175 148 143
@ 24V 106 106 91 88
Power (2W/1W) @ 32V 84 84 72 70
During TX bursts @ 5,5V 1699 1699 1231 1128
@ 12V 707 707 542 501
@ 24V 391 391 321 299
Power (2W/1W) @ 32V 308 308 244 226