IBUC Operation Manual
Terrasat Communications Inc.
Rev. A
4-3
For IBUC’s with a rated power level of 12 watts and below the power for the IBUC may
be through the L-band IFL supplied from the satellite modem or from the Terrasat indoor
IFU. The IBUC DC power can also be supplied directly through the external power
connector (J3). Refer to the label on the unit to determine whether 24 or 48 Volts is
required. Ensure that the 24VDC input voltage is between 20 and 28VDC and that the
48VDC input is between 37 and 60VDC.
For IBUC’s with a rated power of 16 watts or greater, an external power supply is
required. Terrasat offers a 400W outdoor PSUI (good for all power levels up to 40W C-
band or 25W Ku-band) and a 700W outdoor PSUI (good for all power levels up to 80W
C-band and 40W Ku-band). Power supplies have an auto ranging AC front end that will
work with both 115VAC and 230VAC.
All outdoor PSUI’s are equipped with a detachable AC power connector. When
connecting the AC connector to the AC source the wiring must include a 15 or 20 amp
circuit breaker. A disconnect device that is readily accessible must also be provided.
Any outdoor AC connection should be made using suitable connectors or boxes with an
IEC protection class of at least IP65.
The outdoor PSUI is shipped with mating connectors for the AC mains power cable. In
order to remain compliant with European Low Voltage Directive (EN 60950), use a
power cable that meets IEC 60227 requirements such as HAR Cable Designation H03
VV-F or H03 VVH2 -F and/or others with water resistance for outdoor applications.
Power cable plugs must also meet national/local standards.
If a circuit breaker is not easily accessible as a disconnecting device, the input
connector will be the disconnecting device. In this case, the socket-outlet must be
installed near the equipment and must be easily accessible for pluggable equipment.
NOTE: AC transients and surges can cause data transmission errors and
loss of sync in the modem and/or the ODU. Proper precautions should be
taken to ensure uninterrupted service.
Antenna Mounting
Mounting Brackets are available to facilitate attachment to antennas. Generic mounting
instructions for the IBUC, the LNB and the PSUI are given below.
The IBUC can be mounted on the focal point, the boom arm, the antenna back structure
or in the hub depending on the antenna type. The IBUC has mounting holes on both
sides of the unit that can be used to attach the IBUC to the antenna. Terrasat offers an
optional mounting bracket to simplify antenna mounting. Refer to chapter 9 for the
mounting hole dimensions.
The PSUI will typically mount on the boom arm, the antenna back structure or the hub
of an antenna. The PSUI has mounting holes on both sides of the unit that can be used
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