Contact us


Decoder System

Multiple station operation with individual decoders connected along a 2-wire cable

Mottech decoder system utilizes a single pair of wires to operate multiple stations with individual decoders connected

along a 2-wire cable.

Each decoder contains a microprocessor which receives 24VAC power supply and control signals along the 2-wire

line directly from the IRRInet ACE controller.

The decoders are pre-coded with their addresses prior to installation. Then they are attached to the cable to activate

individual solenoids when a coded signal is sent from the IRRInet.

Mottech decoders can be installed in limited-access irrigation areas. They are robust, waterproof and contain internal

effective lightning and surge protection.

Up to 125 outputs can be controlled independently off the same line.

Mottech decoders are available in a choice of 1, 2, 3 or 4-station outputs.

The decoders include autonomous station control, color-coded wire connections, programmable addresses, 2-way

feedback to the IRRInet controller with confirmation and status indication.

The decoders are a part of the IRRInet system and the ICC (IRRInet Control Center) software database. They can be

easily mixed with existing or future Motorola IRRInet products (e.g. Piccolo XR, IRRInet M), hence they are ideal for

new irrigation schemes as well as retrofits and partial re-dos.


Technical Specifications

Mounting: Direct Burial

Wires: Standard direct burial 2-core cable

Power Consumption: Typically 3mA at 26V RMS

Input Voltage: 19V RMS to 32V RMS, 50 or 60Hz, sinusoidal

Solenoid Control:

Single – 1 solenoid
Dual – 2 solenoids
Triple – 3 solenoids
Quad – 4 solenoids

Solenoid Output: Full AC input voltage less 1V is continuously applied to the solenoid for
the duration of the on-time

Max. Output: 500mA RMS steady-state per output (typically powers 2 solenoids).
1.2A max for all outputs combined (models: TW/MOT-2/3/4)

Surge Protection: Built-in
Encapsulation: Waterproof
Ambient Temperature: Operation: +5 °C to +50 °C at 500mA output. Max +60 °C at 250mA output.
Storage: -10 °C to +70 °C
Ambient Operating Humidity: 0-100% RH
Signaling System: Modulation of AC waveform at AC zero crossing
Input Power Distortion: Pure sine wave. Avoid any distortion of waveform slope or perturbations
at the AC zero crossing point or within +/- ¼ cycle from that point
Decoder Address Range: 1-125 outputs in multiple decoders may be programmed to the same
address, but will switch simultaneously. Outputs in multiple decoders may be
programmed to unrelated addresses
Warranty: 3 years

  • WEEE (European) compliant (Exempt)
  • CE (European) marked and compliant
  • RoHS (European) compliant & lead free
  • C-Tick (Australia)

Decoder Interface Module Specifications:

  • Mounting: Fits in IRRInet ACE controller I/O slot
  • Capacity: 2 decoder lines, each line can drive up to 125 outputs (total of 250
    outputs per module)

Ambient Temperature: Operation: +3 °C to +50 °C
Storage: 0 °C to 70 °C
Ambient Humidity: Operation: 20-80% RH (non-condensing)
Storage: 0-90% RH (non-condensing)


  •  Combines a 2 Wire Decoder and Solenoid into one product
  •  Screws into most valves
  •  LED indicator on top of the DIAS
  • More stations active simultaneously