Multitech GPRS Guia do Utilizador descarregar pdf (Página 11)

Chapter 2 – Activation and Installation

Multi-Tech Systems, Inc. MultiModem GPRS Wireless Modem User Guide 11

Power

Plug the power supply cable into the modem.

For two-piece transformer power supply (International).

• Connect the AC cord receptacle into the transformer block.

• Connect the AC cord plug into the power outlet.

For one-piece transformer power supply (North America).

• Connect between the MultiModem power receptacle and the power outlet.

For optional direct-DC powering.

• Connect the direct-DC power supply cable into the DC power source on the vehicle or machine in

which you are mounting the modem. Be sure the GND connection is correct.

• Connect red wire to + (positive) and black wire to – (negative).

Note: For automotive application: according to the type of application, you can use permanent “+” or key-

switched “+”. Connect the power supply to its source (for example, in a mobile situation, to the

vehicle’s DC fuse/terminal block).

Warning

Over-voltage protection is provided on the device. To ensure complete protection, you

may want to add additional filtering to the DC input

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Multitech GPRS Guia do Utilizador Página 11