Mounting Considerations - Comtech EF Data DMD50 Installation And Operation Manual

DMD50 Universal Satellite Modem
2.3

Mounting Considerations

The can be installed within any standard 19 inch equipment cabinet or rack. The unit is a one
rack unit (RU) mounting space (1.75 inches) vertically and 19 inches of depth and requires a
minimum rack depth of 22 inches for cabling. The rear panel of the DMD50 is designed to have
power enter from the left and IF Cabling enter from the right when viewed from the rear of the
unit. Data and control cabling can enter from either side based on data interface option. The
unit can be placed on a table or suitable surface if required
When mounted in an equipment rack, adequate ventilation must be provided. The ambient
temperature in the rack should be between 10° and 35° C, and held constant for best equipment
operation. The air available to the rack should be clean and relatively dry. The DMD50 units
may be stacked one on top of the other up to a maximum of 10 consecutive units before providing
one RU of space for airflow. Demodulator units should not be placed immediately above a high
heat or EMF generator to ensure the output signal integrity and proper receive operation.
Do not mount the in an unprotected outdoor location where there is direct contact with rain, snow,
wind or sun. The is designed for indoor applications only.
Shielded cables with the shield terminated to the conductive backshells are required in order to
meet EMC directives. Cables with insulation flammability ratings of 94 VO or better are required
in order to meet low voltage directives.
The unit CANNOT have rack slides mounted to the side of the chassis. Cooling
fans are mounted on the right-hand side of the unit.
IMPORTANT
If the unit is to be mounted in a rack, ensure that there is adequate clearance for
ventilation, particularly at the sides. In rack systems where there is high heat
dissipation, forced air cooling must be provided by top or bottom mounted fans or
blowers. Under no circumstance should the highest internal rack temperature be
allowed to exceed 50°C (122°F).
MN-DMD50– Revision 3
PROPER GROUNDING PROTECTION REQUIRED: The installation
instructions require that the integrity of the protective earth must be ensured
and that the equipment shall be connected to the protective earth connection
at all times. Therefore, it is imperative during installation, configuration, and
operation that the user ensures that the unit has been properly grounded
using the ground stud provided on the rear panel of the unit.
•
In Finland: "Laite on liitettävä suojamaadoituskoskettimilla
varustettuun pistorasiaan."
•
In Norway: "Apparatet må tilkoples jordet stikkontakt."
•
In Sweden: "Apparaten skall anslutas till jordat uttag."
Installation
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