Multi-Tech Systems MTCBA-G-F4 - Manual (Page 12)

Chapter 2 – Activation and Installation
Multi-Tech Systems, Inc. MultiModem GPRS Wireless Modem User Guide 12
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 mains power outlet.
For One-Piece Transformer Power Supply (North America).
• Connect between the MultiModem power receptacle and the mains power outlet.
For Optional Direct DC Power
• Connect the fused DC power cable into the DC power connector on the modem.
• Then attach the two wires at the other end of the fused cable to a DC fuse/terminal block on a vehicle
in which you are mounting the MultiModem.
• Connect red wire to the "+" (positive) and black wire to the "–" (negative). Be sure the GND connection
is correct.
Warning:
Over-voltage protection is provided on the device. To ensure complete protection, you may
want to add additional filtering to the DC input.
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).