Multi-Tech Systems MTCBA-G-F1 - Manual (Page 17)

Chapter 2 – Installation
Multi-Tech Systems, Inc. MultiModem GSM/GPRS User Guide 17
6. Plug the power supply cable into the wireless MultiModem.
Fused DC
Power Cable
In-Line
Fuse
7a. For standard transformer power supply . Connect the AC cord receptacle into the transformer
block. Connect the AC cord plug into the mains power outlet.
7b. 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).
8. Activate the power supply.