The
Antenna Interface Unit for the CTI-850
Satellite Antenna Control System is intended to be used with a Model
CTI-851 or CTI-854 Satellite Antenna Controller. The AIU is housed in a weatherproof housing for installation
near the antenna.
The AIU performs the following functions:
·
It
provides the motor drive voltages.
Standard AIUs are available for three motor voltages: 24 volts
DC, 36 volts DC, or: 115
volts AC. The
maximum permissible current per motor is four amperes.
·
It
provides an auxiliary 24-volt DC output voltage to operate an external
speed-control relay. This
output can be used only if the antenna is physically equipped for
dual-speed operation.
·
It
monitors the output of the position sensors and transmits this
information to the Control Unit.
The
AIU is connected to the Control Unit over a cable called the "AIU
Serial Link" or ASL:
The
standard ASL consists of a single run of coaxial cable.
Up to four AIUs can be connected to a Model
CTI-854 Control Unit via separate runs of coaxial cable.
On special order, ASLs can be implemented with RS-232 links, RS-422
links, or a fiber-optic link.
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