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Chapter 2 - Installation
Multi-Tech Systems, Inc. MultiModem CDMA User Guide 14
3. Plug the power supply cable into the wireless Multimodem.
Optional
Direct DC
Power Cable
4a. For standard transformer power supply. Connect the AC cord receptacle into the transformer block.
Connect the AC cord plug into the mains power outlet.
4b. 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 MultiModem. 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).
5. Activate the power supply.