MOD-GSM-B Olimex Ltd., MOD-GSM-B Datasheet - Page 7

• Manufacturer Part Number: MOD-GSM-B
• Description: RF Modules & Development Tools GSM-B WIRELESS PROTOTYPE MODULE
• Manufacturer: Olimex Ltd.

Specifications of MOD-GSM-B

• Board Size: 33 mm x 33 mm x 3 mm
• Product: RF Development Tools
• Maximum Frequency: 1900 MHz
• Output Power: 2.5 mA
• Antenna: External
• Supply Voltage (max): 4.5 V
• Maximum Operating Temperature: + 55 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

POWER SUPPLY CIRCUIT
The power supply of MOD-GSM may be done in different ways:
1. Power from +9 - 12VDC without using the internal backup battery.
2. Power from +12VDC with backup battery.
The module is powered only from external 12V and the battery is not
connected. In this case:
Important: 4V_E, 4V and 5V_CHG_E jumpers have to be moved together.
The module is powered with battery and allows battery charging. In this case:
jumper BAT_E must be open
jumper 4V_E must be closed
jumper 4V must be closed
jumper 5V_CHG_E must be open.
DCDC_E must be closed
Power consumption in this mode is:
near to 70mA when have a conversation.
around 20mA in normal mode (without conversation).
jumper BAT_E must be closed
jumper 4V_E must be open
jumper 4V must be open
jumper 5V_CHG_E must be closed
DCDC_E must be closed
Power consumption in this mode:
Depends on live of the battery and vary from 260mA to 330mA (fully
discharged battery). If we supply the module only via battery, without
external power supply, the current through the battery is between 15mA
and 30mA if there is no conversation, and between 180mA - 240mA when
there is conversation.
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