Two Wire Irrigation Valve Decoder for DC Pulse Valves

Use a shared bus for field valve control

A two-wire irrigation decoder receives addressed commands through a powered field bus and provides a local valve output. This arrangement reduces the need for a separate cable pair from the cabinet to every zone. The decoder must be matched to the control system and valve electrical requirements before it is added to a field network.

Design for voltage at the farthest valve

The specified bus supply range is DC 12–48 V, with DC 48 V recommended in the technical description. The stated valve output is DC 12 V at 2 A for compatible DC pulse valves. A stated bus distance up to 3 km is conditional on cable design and a bus voltage of at least DC 18 V at the farthest node; it is not a guaranteed distance for every installation.

Address and test the network

Confirm protocol, addressing method and the total electrical load with the controller supplier. Size copper twisted-pair cable for voltage drop, seal field joints and provide the required surge protection. Test the farthest valve and verify that each address operates the intended zone. Request a quotation for the decoder quantity and compatible system components.