Chapter 2 – Activation and Installation
12
Multi-Tech Systems, Inc. MultiModem GPRS Wireless Modem User Guide
Connecting the Antenna, Serial Cable, and Power
1.
Connect a suitable antenna to the SMA connector (see antenna specifications on page 9).
2.
Connect both sides of the serial and control cable (15-pin Sub D connector on the modem side).
3.
Plug the power supply cable into the modem.
Connecting Two-Piece Transformer Power Supply (International)
1.
Connect the AC cord receptacle into the transformer block.
2.
Connect the AC cord plug into the mains power outlet.
Connecting One-Piece Transformer Power Supply (North America)
1.
Connect between the MultiModem power receptacle and the mains power outlet.
Connecting Optional Direct DC Power
1.
Connect the fused DC power cable into the DC power connector on the modem.
2.
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.
3.
Connect red wire to the "+" (positive) and black wire to the "–" (negative). Be sure the GND connection is
correct.
Note:
Over-voltage protection is provided on the device. For more thorough 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).
