EG_GenProxxe_988_UG_008_UK
Page 39 / 51
Descriptions 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 : 105mA @ 12V in communication
- GSM 1800 MHz : 80mA @ 12V in communication
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
(1*) The power consumption may vary by 5% over the whole operating temperature range (-20 °C to +55 °C)
CONDITIONS
E-GSM/GPRS 900MHz
E-GSM/GPRS 1800MHz
T=25°C and 3V SIM card
I Nom.(mA)
I Max.(mA)
I Nom.(mA)
I Max.(mA)
Idle mode (2*)
@ 5,5V
17,5
23
17,5
23
@
12V
11,7
16,5
11,7
16,5
@
32V
8,6
11,5
8,6
11,5
Idle mode 32K (3*)
@ 5,5V
12
14,5
12
14,5
@
12V
9,2
11,3
9,2
11,3
@
32V
7,7
9,7
7,7
9,7
In communication GSM
@ 5,5V
182,5
195,5
135
145
1RX/1TX @
12V
96
103,5
71,75
78
Power (2W/1W)
@ 32V
40
44,5
31
34,75
In communication GPRS CL10
@ 5,5V
320
341
230
242
3RX/2TX @
12V
165
177
120
127,5
Power (2W/1W)
@ 32V
67
72
50
53,5
During TX bursts
@ 5,5V
1178
1400
670
780
@
12V
600
712
342
400
Power (2W/1W)
@ 32V
230
274
132
156
(2*) Idle mode : modem is registered on the network but not in communication.
(3*) Idle
mode 32K : low power mode controlled by an external application, via the DTR CTS signals.
