TECHNOLOGY


Take on two-wire


Learn the basics of two-wire system troubleshooting.


By Kyle Brown


A 30 Irrigation & Lighting March 2023


two-wire irrigation system can provide a lot of flexibility to contractors, running two sep- arate wires from the central controller to each valve through a decoder. Compared to a con- ventional wire setup where each valve con-


nects directly to a controller on its own wire, that might be an attractive approach in some situations, especially where more valves might be added later. With added flexibility comes added complexity, and troubleshooting a system with more wires can seem much


more challenging. Tere are a few points that tend to be good starting places for trouble, according to Craig Bor- land, CIC, CID, CIT, CLIA, CLWM, sales and marketing at Te Toro Company and an Irrigation Association land- scape instructor. “First and foremost, two-wire is unique in that it runs an alternating current path out to the field on two wires that interconnect all the zones, which is different from conventional irrigation systems where each station has its own primary (hot) wire, and each station has a common


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