MITSUBISHI ELECTRONICS AMERICA, INC.
ST200 Series Technical Support Manual
32
January 2000
3.
Because of the type of cables that are used, it is recommended that the power cable
should be routed from the transceiver unit installation location to the site power plant.
Likewise, it is recommended that the cable which connects the user interface (handset
cradle) should be routed from the site mounting location to the transceiver unit.
4.
Cable lengths are fixed and must not be spliced to add or remove length.
5.
Grommets should be used whenever routing cable through holes drilled in metal or
through bulkheads. A ribbed flexible wiring loom may also be used to protect cables
in hazardous locations where damage may occur.
6.
In addition to grommets, silicone sealant (RTV) should be used to weatherproof all
holes that are drilled on the outside of the site.
7.
All cables should be securely fastened with cable ties to fixed objects so that they do
not dislodge or flap loosely. Cables should be secured every 12-18 inches (30-45cm).
8.
Ultra-violet resistant cable ties should be used when securing cables outside of the
site. Other types of cable ties do not withstand the weather conditions or exposure to
sunlight.
9.
The main power or constant 120V AC line should be unswitched and connected
directly to the site AC power supply. The built-in fuses in the power supply provide
adequate current protection for the MT electrical system.
10.
Placement of the CTU must be in an environmentally protected and ventilated area.
11.
The electronic components are not waterproof. They are only weather resistive to
dust or naturally occurring humid conditions (normal weather). Excessive high
humidity conditions or extreme temperature changes are not considered “normal”.
The fixed site antenna unit is considered weatherproof.
12.
The wiring to the AU should never be in a downward route. A “drip loop” should
always precede the connection to the AU. This retards the natural “wicking” action
of moisture into the AU.
6.1.3 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. The Installation
engineer or technician should plan after consultation with the customer.
The following illustration is a complete overview of all the components and available (optional)
accessories for the Mitsubishi Fixed Site Satellite Terminals.
