This is a node of the a satellite irrigation system, it basically controls 24 water valves in this area of the golf course. A centralized controller will control the nodes via satellite to irrigate the golf course. There are 8 of these nodes in a 13-hole golf course.
For this job, we were tasked to revamp the existing satellite controlled system to a local control system where the irrigation is controlled by a smart-relay. A smart-relay is a programmable logic controller that allows us to write a ladder program to control the outputs, in this case, are the water valves.
To save the environment and cost, we reused the outer enclosure of the satellite system and installed our own system in it. The outer enclosure is weatherproof and still in a good condition, it is made of a hard plastic material therefore very durable.
For this system, we installed a 65kA lightning surge arrester as lightning strikes are prevalent around the golf course. The surge arrester will ensure that the lightning will not damage the internal circuitry of our system.
Also, a relay with bypass switch is used so that the user can turn on each individual valve manually. This is particularly useful during troubleshooting when they are trying to find out which valve is faulty.