Siemens ET7 Series Especificações descarregar pdf (Página 61)

DSB75 Development Support Board Rev. B1 Hardware Description

Strictly confidential / Released

DSB75_hd_v08 Page 61 of 94 29.09.2005

3.14.3 Battery Powered Operation of GSM Module

The external battery connects to the screw

terminal block X602 (see Figure 37).

Figure 37: Battery screw terminal

For battery operation, the toggle switch S601 must be flipped up (position 3). In this case, the

GSM module is powered only from the battery. Furthermore, it is necessary to keep the

laboratory PSU connected for operating parts of the DSB75.

Table 26: Pin assignment of the screw terminal X602

X602 pin. Function

1, 2 GND

4, 5 VBAT (BATT+)

3 Thermal resistor (NTC)

The following batteries meet the requirements of the GSM module:

 Lithium Ion with 10k NTC

 Lithium Polymer with 10k NTC

See module specification [1] for details.

3.14.3.1 Charging the Battery

The battery charging current should be supplied from an external plug-in charger connected

to the Lumberg connector X700 or X701 on the DSB75.

Please note that the plug-in charger is not part of the delivery scope of the DSB75. It can be

purchased on request from your local Siemens dealer:

Siemens ordering number: A5BHTN00127458 (connector compatible to X701)

Charging can be accomplished regardless whether the battery was deeply or partly

discharged.

The charger has to meet the following requirements:

Output voltage: 4.75V … 10V

Output current: 550mA or 1050mA

Battery Connector

Battery

X602

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