Wavecom FASTRACK M1306B User's Guide download pdf (Page 36)

WM_PRJ_M13_UGD_001 - 001

20th July 2004

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7.2 Power supply

7.2.1 General presentation

The modem is supplied by an external DC voltage (V+BATTERY) from +5.5 V to

+32 V.

Main regulation is made with an internal DC/DC converter in order to supply all

the internal functions with a DC voltage.

Correct operation of the FASTRACK modem in communication mode is not

guaranteed if input voltage (V+BATTERY) falls below 5.5 V.

7.2.2 Protections

The modem is protected by a 2.5 A / 250 V fuse directly bonded on the power

supply cable.

The modem is also protected against voltage over +32 V.

When input voltages exceed +32 V, the supply voltage is disconnected in order

to protect the internal electronic components from an overvoltage.

Filtering guarantees:

! EMI/RFI protection in input and output,

! Signal smoothing.

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Wavecom FASTRACK M1306B User's Guide Page 36