BT2 Eurocard serial translator

The Aquamonix range of 2-Wire Translators are marketed globally under Tonick Watering.

Tonick translators provide both the power and signaling to a range of field devices via a 2-wire pathway, and are capable of complex control and data collection. Tonick translators can be connected to your control system via a serial MODbus port or a simple multi-wire digital input interface.

The BT2 Eurocard Translator is a true A/C 2-wire decoder for landscape applications, compatible with Tonick decoder translators.

  • Large terminals on two wire output
  • Conformal coated to allow operation in 95% humidity (non-condensing)
  • Operation rated to ambient +70°C
  • Compatible with the complete Tonick decoder family


  • Supply voltage 24 ~ 32 V RMS AC 50 or 60Hz
  • Supply current UP TO 1.3A
  • Output voltage 23 – 31 V RMS AC
  • Output current Max continuous- 1.2A at +50°C Ambient- 0.6A at +70°C Ambient
  • Recommended inverted power supply is 12VDC – 28VAC, constant, 60Hz (Tonick part number: PSU1228.)Note: Full Line output voltage will be continuously applied to the solenoids connected to ‘on’ decoders. Attention must be given to the specifications of these solenoids.

Line Signalling

  • Up to 127 Tonick 2-wire decoders, or Decoder-In-A-Solenoid (DIAS)
  • Up to 16 actives (subject to total solenoid loads)
  • Allow 45 seconds after power-up before switching decoders
  • Custom firmware for OEM systems
  • Compatible with all Tonick decoders and with Decoder-In-A-Solenoid (DIAS)
  • Compatible with all Tonick Sensor decoders for moisture, pressure, water level, flow and digital inputs


  • 8-bit RISC. 8 MIPs, 64K flash / 4K RAM / 4K EEPROM


  • Re-writable application in general flash space. Uses Kanda Keyfob programmer


  • RS485 half-duplex (+-80V fault, 15kV discharge)
  • 9600 Baud, N,8,2 (other formats on request)
  • A, B line biasing resistors and 130Ω line terminating resistor


  • 1KV between decoder line/ transformer AC input and RS485 circuitry

Slave Address Programmable

  • 1…7 using the plug-in DIL switches. Factory Set: Slave address 1


The Tonick BT2 should be wired as follows:

  • AC and AC terminals should be wired to the transformer supply
  • L1 is the Field Cable ‘Live’ terminal (referred to as the ‘Line’)
  • L2 is the Field Cable ‘Neutral’ terminal
  • RS485 Terminals
  • A (D0), B (D1) are half duplex RS485 signals
  • B is more +ve than A during line idle conditions
  • COM is the ground of the RS485 circuitry and must be connected to the RS485 0V of host controller
  • The RS485 is optically isolated from the Tonick BT2 decoder circuits by at least 1KV to help protect against lightning surges propagating into the host controller


  • Storage: 0 to 70°C 5% to 95 % humidity (non-condensing)
  • Operation ±5 to +70°C, de-rated from 1.2A output at +50degC to 0.6A output at + 70degC, 5 to 95% humidity (non-condensing)
  • Conformal coating with acrylic, except fan and terminals

Grounding System

  • The Earth Stake terminal (EST) MUST be connected to a properly bedded earth stake or plate via a 4mm2 (#11 AWG) or larger earth wire. This earth system is not to be regarded as an electrical safety earth. Connection of the EST to a building and/or an electrical earth is NOT permitted
  • Use of the Tonick Line Terminating Unit (LTU) at each termination of the 2-wire path is recommended to complete the lightning protection system

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