Terrasat IBUC 2, Operation Manual

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General Requirements
|
3-7
Engineered to Endure
others with water resistance for outdoor applications. Power cable plugs must also
comply with all applicable local and federal standards and regulations.
Indoor Power Supply
Terrasat offers a 1000 watts indoor power supply unit (PSUI) which provides 48 VDC
power. The 1000 watts PSUI can power C - band and X - band units through 125 watts,
Ku - band units through 80 watts, and Ka - band units through 40 watts. Each indoor
PSUI is packaged in a rack - mountable chassis which occupies one rack unit (1.75 in.)
of space. The indoor PSUI is shipped with a mating connector for DC power and a
power cord for AC mains.
Note:
AC transients and surges can cause data transmission errors and loss of
synchronization in the modem and/or the ODU. Take proper precautions to ensure
uninterrupted service.
Grounding
Terrasat recommends the following grounding and lightning protection:
• Cable Shielding
Shield currents can be eliminated with proper techniques. A grounding strap at the
end of the coaxial and data cables should be connected to the ground lug at the
antenna base with #4 gauge copper wire. This provides a path of least resistance
prior to entering the equipment.
• AC
The best way to protect the equipment is to have two protectors. The first is the
power mains protector that is mounted directly across the mains in the breaker box.
The second should be mounted or grounded directly at the base or hub of the
antenna or at the 19 - in. rack.
• Data and Control Lines
The I/O lines can deliver surge current to the equipment and should also be
protected.
• Electrical Grounding
Grounding of the IBUC
2
, IBUC
2e
, IBUC
2 G
, IBUC
R
or IBUC
G
and PSUI
units is recommended to prevent possible damage from lightning or other induced
electrical surges. Terrasat recommends using 3/0 or 4/0 AWG stranded copper
wire for bonding the IBUC and the PSUI to the earth ground (or grounding rod),
using the most direct or shortest route.
Antenna Recommendations
Most antenna masts are encased in concrete. Typically, the mast pipe is submerged in
a 4 ft to 5 ft (1.22m to 1.53m) deep augered hole. This provides a good Ufer ground.
A Ufer ground encases grounding connectors in concrete. Concrete absorbs moisture