The different numbers (G3, G4, G4.5) represent the hardware we used in each generation. Each time newer and more modern components were used and therefore the system managed to perform better (increased range, increased noise filtration, improved frequency separation)

The system is built from three main parts:

• Interface RF – Communicates with the controller / UNILINER unit on side and with the Master antenna on the other side.
• Master antenna – The central antenna, communicates the INT RF on one side and with the RF RTUs on the other side.
• RF RTU – The RF RTU (Remote terminal unit) is basically a small simple controller that performs whatever the INT RF tells it to.

Each RF RTU is capable of:

• Controlling:
  • Pumps
  • Valves
  • Fertilizer injectors
  • Filters
• Monitoring:
  • Water meters
  • Fertilizer meters
  • Water floats (Reservoirs and tanks)
  • Pressure sensor
  • Differential pressure sensor
  • Analog sensor – Temperature, humidity, tensiometers, radiation, CO2, water level and ect..

The maximum range between the controller and the furthest RTU is 2.5 km (with line of sight). These generations are capable of 1 level of repetition, which means a single RF INT can control & monitor elements in a 5km radius!

Each INT RF is capable of communicating with up to 60 RF RTUs. The communication with all the RTUs is done every couple of seconds (Depending on the number of RTUs)

Energy options:

• 4 X “D” type alkaline batteries – Modular RTUs
• 4 X “C” type alkaline batteries – ECO RTUs
• 5W solar panel + 12V 3.3aH rechargeable battery
• 5W solar panel + 12V 1.3aH rechargeable battery (For units with analog inputs)

The RF system uses the ISM bands (433 / 868 Mhz) and a 10mW transmission power and therefore it is a LICENSE FREE SYSTEM. The outputs can control 12V DC latch solenoids.

There are several RTU RF models:

• RTU RF ECO – An economic non modular solution, to be used where devices in the field are far away one from another and future expansion in not likely.
  • 1 Output / 1 Input
  • 2 Outputs / 2 Inputs
• RTU RF MODULAR – A modular solution, to be used where devices are grouped together or a future expansion is possible.
  • 2/4/6/8 outputs
  • 0/4 digital input
  • 0/2/4 analog inputs (4-20mA/ 0-5V, SDI–12)

Programing is done easily by using the Dipswitches (Besides an RTU with analog inputs, which requires a connection to a PC / Laptop)