User guide

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Description and non-contractual illustrations in this document are given as an indication only.
ERCO & GENER reserves the right to make any modifications.
8.2 Electrical
8.2.1 Power supply
Table: Voltage range and power consumptions
Operating voltage range
5.5V to 32V DC (GSM or DCS or GPRS)
Average power consumptions
- GSM 900 MHz : 90mA @ 12V in communication
- GSM 1800 MHz : 80mA @ 12V in communication
- Idle mode : 12mA @ 12V
Note : The modem is permanently powered once the power supply is connected.
The table below indicates the consequences of over and under-voltage on the modem.
Table: Effects of a power supply defect
If the voltage :
Then :
falls bellow 5.5V
GSM and GPS communications cannot be
guaranteed.
goes above 32V
(transient peaks)
The modem guarantees its own protection.
goes above 32V
(continuous over-voltage)
The modem is short-circuited by an internal varistor.
The modem is then protected by the in-line fuse.
The table below indicates the power supply consumption of the modem without the RS232 connected.
Table: Consumption (1*) without RS232 connected
CONDITIONS
E-GSM/GPRS 900MHz E-GSM/GPRS 1800MHz
T=25°C and 3V SIM card I Nom.(mA) I Nom.(mA)
Idle mode (2*) @ 5,5V 17,5 17,5
@ 12V 12 12
@ 24V 11 11
@ 32V 8,5 8,5
In communication GSM @ 5,5V 180 156
1RX/1TX @ 12V 90 80
@ 24V 46.5 39.5
Power (2W/1W) @ 32V 35 30
In communication GPRS CL10 @ 5,5V 329 275
3RX/2TX @ 12V 167 140
@ 24V 86.5 72.5
Power (2W/1W) @ 32V 65 54
During TX bursts @ 5,5V 1250 1000
@ 12V 630 506
@ 24V 318 252.5
Power (2W/1W) @ 32V 246 197
(1*) The power consumption may vary by 5% over the whole operating temperature range (-20 °C to +60 °C)
(2*) Idle mode: modem is registered on the network but not in communication.