MITSUBISHI ELECTRONICS AMERICA, INC.
ST200 Series Technical Support Manual
45
January 2000
8.
The ground (black) line should be connected directly to the vehicles’ battery ground.
9.
The switched ignition line should be connected to a +12 V switched (accessory) line. Be
careful not to connect this line to an accessory line that may carry a low voltage accessory
trigger voltage. In many vehicles a low voltage trigger line may be used. This line carries
less than the re12 Volts. When checking for the sw12V line, do not rely on
a “test light”. Confirm your circuit choice with a voltmeter.
10.
Placement of the CTU must be in a protected but ventilated area. There are no specific areas
to install the CTU, however it is possible to locate the CTU under the seat, on the rear cab
wall of a typical truck or four wheel drive or in the trunk compartment of a typical
automobile.
11.
The electronic components are not waterproof. They are only weather resistant to dust or
naturally occurring humid conditions (normal weather). Excessive high humidity conditions
or extreme temperature changes are not considered “normal”.
12.
Wiring to MT components should not be run in an unbroken downward route. A “drip loop”
should always precede the connection to the AU. This retards the natural “wicking” action of
moisture into the AU. The Dome and Transportation Antennas are “weather-proof”.
6.2.3 Installation Planning
Proper location of the various components of the MT is one of the most important parts of the
installation. It has a direct effect on the customer's ease of use of the MT. Installation should be
planned by the installation staff after consultation with the customer. Safety, technical feasibility
and customer desires should always be taken into consideration when planning an installation.
The following figure is an overview of the components and available (optional) accessories for
the Mitsubishi ST211 land mobile terminal.
