User guide

Chapter 2 – Activation and Installation
Connect the Antenna, Serial Cable, GPIO
Cable, and Power
1. Connect a suitable antenna to the SMA connector (see antenna specifications in Chapter 1).
2. Connect the DB9 connector (9-pin) of the RS232 cable to the RS232 connector on the modem and
connect the other end to serial port on your PC.
The USB connector is provided for future use.
3. Connect the GPIO cable to the I/O connector on the modem and the other end to the external device that
the modem is monitoring.
4. Depending on the power source, connect either the power supply module with the appropriate blade or
the optional DC power cable. If you are using the power supply module, remove the protective shipping
cover. Attach the appropriate interchangeable blade piece to the power supply module.
Screw-on the power lead from the power supply module to the power connection on the modem. Now,
plug the power supply into your power source.
For Optional Direct DC Power
• Screw-on the DC power cable to the power connector on the modem.
• Then attach the two wires at the other end of the DC power cable to a DC fuse/terminal block on a
vehicle in which you are mounting the MultiModem.
• Connect red wire to the "+" (positive) terminal and black wire to the "–" (negative) terminal. 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 “+” source. Connect the power supply to its source (for example, in a mobile
situation, to the vehicle’s DC fuse/terminal block).
Multi-Tech Systems, Inc. MultiModem iCell Intelligent Wireless Modem User Guide 13