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Temperature based air control in ships

The design of the electronic speed controller GTE21-60-DM is based on years of experience in temperature control in greenhouses and other agricultural applications, combined with an innovative electronic technology.
Temperature based air control in ships
 
In fact, this controller is suitable for any application where it is important to ventilate once a certain temperature has been reached. We notice for example that it is frequently installed for use in ships.
 
The GTE21-60-DM has 2 rotary knobs on the front. The left one to set the temperature (5-35°C) and the right one to set the minimum speed. Maximum speed can be determined via an internal trimmer. Parameters can also be set via the Modbus registers.
 
The controller also has an unregulated output (230 VAC) which is active whenever the motor is activated. This output can be used to control an external indicator light, a damper, valve etc.
 
To be able to control the ventilation based on temperature, a PT500 temperature probe needs to be connected.
 
Our GTE21-60-DM had automatic detection of 50/60Hz. Therefore, it was very important that the power source was as clean as possible. The zero cross detection is very sensitive and therefore everything must go well to have good results. 
 
On ships, even more than elsewhere, mains supply voltages have a lot of noise on the AC-signals coming from other devices connected to the mains supply network, which could interrupt correct detection. It is not easy to get this filtered and to keep correct zero-cross detection needed to fire the Triac at correct intervals.
 
To avoid wrong detection we added a Modbus register (HR20) where you now manually can choose between 50 (default) and 60 Hertz. This manual choice deactivates the automatic detection and ensures a higher reliability of the controller.
 
For more information about this controller, please contact us.
 
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