EDDY – The Tool for Adaptive Management of Electronic Devices on 0–10 V and PWM Control Networks

EDDY is SELPRO's range of electronic interfaces designed to boost, stabilise and convert analogue 0–10 V and PWM control signals for EC fans and other electronic devices.

In analogue control systems, the controller's available output current and the characteristics of connected devices can affect signal distribution. EDDY operates between the controller and the connected devices, adapting the command signal to the requirements of the control network.

The range includes two main solutions:

• EDDY CMM: Boosts and stabilises the 0–10 V command signal, providing up to 60 mA output current, with a 200 mA version available on request.

• EDDY CMP: Converts the analogue 0–10 V command into a 25 kHz PWM signal, providing up to 20 mA output current.

EDDY electronic interfaces can operate in Master mode, generating a locally set command, or in Slave mode, processing the signal received from a remote controller.

EDDY also incorporates emergency command management functions. If the remote control signal is lost, the device can apply a preset P1 value. The Speed-Up function allows the command to be forced to its maximum value via a dedicated contact.

EDDY allows the existing control system to be retained, adding signal boosting, stabilisation and conversion capabilities, together with a defined response to loss of the remote command.

Designed for DIN rail mounting, EDDY interfaces can be integrated into new installations and retrofit projects, both in HVAC&R applications and other systems using analogue 0–10 V or PWM control signals.

Signal Management

• Analogue 0–10 Vdc command input.

• EDDY CMM: 0–10 V signal boosting and stabilisation.

• CMM output current: up to 60 mA.

• 200 mA CMM version available on request.

• EDDY CMP: 0–10 V to PWM signal conversion.

• CMP PWM frequency: 25 kHz.

• CMP output current: up to 20 mA.

Operating Modes

• Master mode: Generates a locally set command signal.

• Slave mode: Processes the command received from an external controller.

• Booster function for analogue signal amplification.

• Manual command for functional testing and specific applications.

• Integration with existing analogue control systems.

Emergency Functions

• Fail Safe function with preset P1 command value.

• Application of the P1 value following loss of the remote command, according to the device's defined operating conditions.

• Speed-Up function to force the maximum command via a dedicated contact.

• Remote activation of a preset command value.

Installation and Power Supply

• Nominal power supply: 24 Vac.

• DIN rail mounting.

• Compatible with devices featuring suitable 0–10 Vdc or PWM command inputs.

• IP55 version available on request.

EDDY electronic interfaces are designed for OEM manufacturers, system integrators, installers and service professionals using analogue 0–10 V or PWM signals to control EC fans and other electronic devices.

Main applications include:

• Remote condensers: Boosting and stabilising analogue control signals for compatible EC fans.

• Dry coolers: Distribution of fan speed commands and management of preset control values.

• Chillers and refrigeration units: Integration between controllers with 0–10 V outputs and fans equipped with compatible analogue or PWM inputs.

• Industrial cooling systems: Adapting signal output capacity to the electrical requirements of the control network.

• Retrofit of existing installations: Retaining the original controller while adding signal boosting, stabilisation or conversion functions.

• HVAC and ventilation systems: Using 0–10 V or PWM commands to control compatible electronic devices and actuators.

• Industrial automation: Interfacing with motorised valves, inverters, pumps, dampers and other devices featuring compatible command inputs.