Decoders

A technology long-since proven on golf courses around the world, Rain Bird decoders provide "best-in-class" field control on centrally controlled irrigation systems.

Installed underground and featuring simple, low-cost wiring, decoders are an aesthetically pleasing, full-featured, economical option for reliable in-field control.

Features

  • Improve aesthetics and reduce costs with buried in-field controls.
  • Easy system expansion…simply splice into the communication line and add additional decoders.
  • Installation requires up to 80 percent less wire than conventional controller systems.
  • Electronic components are completely encapsulated to protect against the elements.
  • Simple, two-wire system can be spliced and stored during installation.
  • Underground decoders reduce the chance of damage from animals or vandals.
  • Pre-coded addressing eliminates confusion associated with switch-based addressing.
  • With the addition of Rain Bird’s Decoder Programming Unit (DPU), decoder addresses can be reassigned if necessary.

Simple, Reliable Control

  • If you’re looking for an alternative to a traditional in-field controller, Rain Bird decoders may be the right solution for you. These self-contained switching stations for your central control system are simple, yet very reliable. They work with your central control system just like conventional controllers but are buried underground away from the elements.

A Cost-Effective Alternative

  • A simple wiring configuration and absence of protective enclosures keeps installation and maintenance costs low. Rain Bird decoders are a “true lower than 30 volt” system that utilize a two-wire path of 14-gauge wire connecting the central control system, decoders and valves or valve-in-head sprinklers.

Sensor Capability

  • If you need information from analog, pulse or switch sensors to manage your irrigation, connect the sensor to the SD-210 sensor decoder and view the data at the central. Using Smart Sensor, sensor data can even be used to control the irrigation.

Protect Against the Elements

  • With all electronic components fully sealed within a water‑tight enclosure and buried underground, damage from floods, frost, rodents or vandals is virtually eliminated. Rain Bird decoders are an especially good choice for flood plains.

An Out-of-Sight Solution

  • Buried decoder systems leave nothing exposed to the elements. With no evidence of in-field control, this aesthetically pleasing alternative works perfectly in situations where controller enclosures are unwanted or impractical.

Excellent for Renovations

  • Thanks to advanced central control technology and simple wiring requirements, decoders are a smart choice for many golf course renovations. With Rain Bird’s Cirrus,™ Nimbus™ II and Stratus™ II Central Control Systems, it is now possible to use Rain Bird’s hybrid control feature to operate controllers and decoders concurrently. This makes it easy to expand irrigation coverage using a minimal amount of wire and decoders.

In-Field Control Options

  • The addition of decoders doesn’t mean the elimination of in‑field control. Decoders can be turned on and off in the field with The FREEDOM System or MI Series Mobile Controllers. The MI Series Mobile Controller allows precise control of the decoder system anywhere Internet access is available, even on a mobile phone. Another alternative is the FREEDOM System. This handheld radio remote allows you to signal changes to the central control system from anywhere on the course.

The Right Amount of Control

  • Select different decoders to operate one, two, four or six solenoids. Five different decoders let you choose the amount of control you need.

Specs

Basic Data for a Decoder System

  • Decoder addresses per LDI interface unit: 500 maximum ‡
  • Decoder addresses per SDI interface unit: 200 maximum
  • Active solenoids per LDI (with 20 mA current draw each): 40 maximum
  • Active solenoids per SDI (with 20 mA current draw each): 15 maximum
  • Active solenoids per two-wire path on LDI (with 20 mA current draw each): 20 maximum
  • Active solenoids per two-wire path on SDI (with 20 mA draw current each): 15 maximum
  • Maximum allowable voltage drop per two-wire path: 9 Volts
  • For LDI or SDI Lights: 15 mA (total) ◊
  • For each inactive FD-101 or FD-102 decoder: 0.5 mA each
  • For each inactive FD-401, FD-202 or FD-601 decoder: 1.0 mA each
  • For each active DV solenoid coil with black wires: 15 mA each
  • For each active Golf (green) solenoid coil: 20 mA each
  • For each active B solenoid coil with white wires: 25 mA each
  • LSP-1 Installation: No more than 8 decoders between two LSP-1 surge arrestors or no more than 500 ft., whichever is less. LSP-1 ground grid resistance of 50 ohms or less is recommended.
‡ Although the LDI can handle a maximum of 500 decoder addresses total. With any number over 380, the number of active decoders you will be able to operate simultaneously may be reduced.
◊ Although the LDI and SDI can supply 1,000 mA and 500 mA respectively, allow 50 mA of safety factor (design 950 mA with an LDI and 450 mA with an SDI)

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