G2W – Gal 2 Way – Installation and Operation Guide
11
Field Units Power Supply
The field units are powered by four 1.5V D-size alkaline batteries, which are inserted into the battery
compartment. The field units can alternatively be powered by an external solar panel and charged
batteries or an internal battery. Contact Galcon to request these alternative components.
Note:
Galcon RTU field units do not supply power to the connected sensors. When
connecting sensors to the analog inputs or when transmitting data to the digital inputs you
must supply an external source of power for them.
Field Units Connection
The field units can be connected to two antenna types in various combinations in order to achieve
variant communication transmission strengths. Connect each field unit to its antenna(s) with RF cables.
Do not bend the cables below a radius of 30 cm. Always keep a 60 cm distance between any two
antennas.
The various combinations below are listed according to increasing communication transmission strength:
Single 916-CW-HW antenna.
Two 916-CW-HW antennas.
916-CW-HW antenna & FG9023 antenna.
Two FG9023 antennas.
Repeater (Relay)
The repeater unit is used when the communication between a field unit and the concentrator is weak, or
when the field units are installed in locations where obstacles interfere with radio communication
between the field units and the concentrator.
The repeater is designed for installation in the field without the need for an external power source. For
this purpose, it includes both a solar panel and charged batteries.
Repeater Connections
Connect the repeater unit to two FG9023 antennas with RF cables. Do not bend the cables below a
radius of 30 cm. Always keep 60 cm distances between antennas.
Concentrator
The concentrator acts as the system manager. The concentrator transmits, via radio communication, the
controller’s commands to all the field units, and returns the various inputs of the field units to the
controller. The concentrator is connected to RF antennas and cables. The concentrator is equipped with
a backup battery which lasts for at least 24 hours.
