Talgil Computing and Control LTD RF-MODULE-45 사용자 설명서
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Each RF RTU can act also as a REPEATER that can help reaching far RTUs or
help reaching those that are hidden by obstacles. Such a unit can function both as
an RTU and as a REPEATER at the same time.
NOTE : The upper part of the pole holding the RF MASTER and RF
SLAVE units must be made of nonmetallic material, otherwise the radio
signal may suffer some power attenuation.
SLAVE units must be made of nonmetallic material, otherwise the radio
signal may suffer some power attenuation.
The construction of the
poles must include facilities that will enable easy lowering.
NOTE: Despite the resemblance between the MASTER and SLAVE
units, they are not interchangeable.
units, they are not interchangeable.
The RF RTU can be powered either by dry batteries or by rechargeable battery
charged by solar energy. When powered by dry batteries it will use 6v DC, supplied
by 4 x 1.5v
charged by solar energy. When powered by dry batteries it will use 6v DC, supplied
by 4 x 1.5v
“D” type standard alkaline batteries. When powered by solar energy, the
RF RTU will contain a 12v 1.0Ah rechargeable battery. Regular RTU will use a 2
Watt solar panel, and those who serve as repeaters will use a 5 Watt solar panel.
Assuming ideal conditions, in an area with no obstacles and no interferences, the
distance between the MASTER and a directly communicated RTU can reach about
2.5 -3km. By utilizing a REPEATER, the distance can be doubled.
Watt solar panel, and those who serve as repeaters will use a 5 Watt solar panel.
Assuming ideal conditions, in an area with no obstacles and no interferences, the
distance between the MASTER and a directly communicated RTU can reach about
2.5 -3km. By utilizing a REPEATER, the distance can be doubled.
2.
SETTING UP AN RF RTU SYSTEM
The process of setting up an RF RTU system starts at the host controller (DREAM,
UNILINER, MINILINER, OASIS) where some necessary definitions have to be
made through which the controller is informed about the details of the RF system to
be controlled (see below).
An appropriate location should be found for locating the pole of the RF MASTER. It
should be not too far from the host controller and it should be as high as possible in
order to assure a clear line of sight to most of the RTUs in the field. Remember that
the upper part of the pole should be nonmetallic.
The RF INTERFACE that coordinates between the
MASTER and the host controller can be located inside the
host
UNILINER, MINILINER, OASIS) where some necessary definitions have to be
made through which the controller is informed about the details of the RF system to
be controlled (see below).
An appropriate location should be found for locating the pole of the RF MASTER. It
should be not too far from the host controller and it should be as high as possible in
order to assure a clear line of sight to most of the RTUs in the field. Remember that
the upper part of the pole should be nonmetallic.
The RF INTERFACE that coordinates between the
MASTER and the host controller can be located inside the
host
’s enclosure or externally. When external it will come
in a separate box and both sides of the interface the one
that is connected to the host and the one that is
connected to the Master will use a shielded 4 wired cable
for connection. The red and the black wires supply the
power (12v DC) and the green and white wires support
the communication; in both cases the polarity is important,
follow the directions below. The shield will be connected
together with the black wire.
that is connected to the host and the one that is
connected to the Master will use a shielded 4 wired cable
for connection. The red and the black wires supply the
power (12v DC) and the green and white wires support
the communication; in both cases the polarity is important,
follow the directions below. The shield will be connected
together with the black wire.
Connection to
the RF Master
the RF Master
Connection to
the host
the host