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EU declaration conformity
Greenhouse air extraction | 5-35 °C | 6 A
Product description
Temperature-based speed control for single-phase motors (up to 6 A), ideal for glasshouses.
Modbus RTU for remote/auto settings; proportional speed adjustment (low below setpoint, increases above).
Operates standalone, via PC software, or SenteraWeb.
PT500 temperature probe input, potentiometers for 5-35 °C setpoint and min speed.
Internal trimmer for max speed, hysteresis, and proportional range.
Reliable RABS V0 grey (RAL7035) enclosure.
230 VAC supply; adjustable Vmin (80-160 VAC) and Vmax (170-230 VAC).
Additional specifications and description
How Does the GTE-21-60-DM Provide Versatile Temperature-Based Fan Control?
If you need sophisticated fan speed control for your greenhouse, this is what you need. This device is the updated version of Sentera’s GTE series. Just like version 1, this one is intended for monophasic voltage controllable motors and control is based on the measured temperature. What makes it perfect for your modern hothouse is the fact that it features Modbus RTU. This means you can control the environment parameters remotely or automatically based on the setting you have applied. When the measured temperature is lower than the temperature setpoint, the fan runs at low speed. When the selected temperature is exceeded, the fan speeds up. The higher the measured temperature, the faster goes the fan.
Its greatest advantage compared to the old product version is its operating temperature range – from 5 to 35 °C.
What Are the Operation and Control Modes of the GTE Controller?
The controller can be used both on its own or be controlled by a computer and operated by 3SModbus software of Sentera, which is free and can be downloaded from our website. It can also be connected to SenteraWeb and controlled from any part of the world!
When used standalone, it is manually controlled, however, its jumpers need to be set to the desired values. The built-in potentiometers are used to control temperature setpoint and minimum speed.
When used in Modbus mode, its parameters are set via Modbus RTU. This means the device is controlled remotely via a PC, so there is no need to set the jumpers, i.e. they can remain in their factory set positions.
The device also features a further option – you can connect it to SenteraWeb and control the fan speed via the Internet.
How Can Controller Settings Be Adjusted and Monitored?
All settings of this fan speed controller can be adjusted and monitored via Modbus RTU communication. All you need to do is download our free 3SM Software from our website and you get the motor control type you wish – manual or digital, i.e. local or remote!
What Type of Temperature Probe is Required for the Controller?
To measure the temperature in the greenhouse, you need to connect a PT500 temperature probe to the controller and place its sensor in an appropriate point. Based on the measured temperature the controller works towards reaching the setpoint selected via the potentiometer on the enclosure or via Modbus (bear in mind that Modbus mode overrides manual control).
Can Multiple Motors Be Connected to This Controller?
You can connect several motors to the controller as long as the current limit of 6 A is not exceeded. In this case all of them will run at the same speed.
What is the Purpose and Function of the Unregulated Output?
This controller features an unregulated output which is active when the motor is enabled. It is called so since it is either ON (230 Volt) or OFF (0 Volt). If the supply voltage is connected to L and N, the unregulated output is active while the motor is in operation. The unregulated output is used to control external devices such as dampers, relays, run indicators, etc. that can work without the need to regulate the incoming voltage. In other words the GTE regulates the fan through the so called “regulated output” via controlling the voltage with the option to regulate one more device, but this time the voltage is “unregulated”, i.e. either 0 V or 230 V. When the fan stops, the connected external device will be disabled – the damper will be closed or the run indicator will switch off. While the fan is working, the damper will remain open and the indication light will be switched on. The maximum current of the unregulated output is 2 A.
What Are the Safety and Durability Features of the Controller's Enclosure?
To make sure our products last long, work well and are fail-safe, we manufacture our enclosures. This industrial enclosure is made of R-ABS, V plastic - high-grade material is specially developed for engineering applications in the electronics sector or in the automotive, e.g. for car interior parts, wherever maximum performance at high temperatures is required. This material is flame retardant in case of fire, solid and provides good protection against impacts. Its protection class is IP54 against dust, dirt and water.
If you need sophisticated fan speed control for your greenhouse, this is what you need. This device is the updated version of Sentera’s GTE series. Just like version 1, this one is intended for monophasic voltage controllable motors and control is based on the measured temperature. What makes it perfect for your modern hothouse is the fact that it features Modbus RTU. This means you can control the environment parameters remotely or automatically based on the setting you have applied. When the measured temperature is lower than the temperature setpoint, the fan runs at low speed. When the selected temperature is exceeded, the fan speeds up. The higher the measured temperature, the faster goes the fan.
Its greatest advantage compared to the old product version is its operating temperature range – from 5 to 35 °C.
What Are the Operation and Control Modes of the GTE Controller?
The controller can be used both on its own or be controlled by a computer and operated by 3SModbus software of Sentera, which is free and can be downloaded from our website. It can also be connected to SenteraWeb and controlled from any part of the world!
When used standalone, it is manually controlled, however, its jumpers need to be set to the desired values. The built-in potentiometers are used to control temperature setpoint and minimum speed.
When used in Modbus mode, its parameters are set via Modbus RTU. This means the device is controlled remotely via a PC, so there is no need to set the jumpers, i.e. they can remain in their factory set positions.
The device also features a further option – you can connect it to SenteraWeb and control the fan speed via the Internet.
How Can Controller Settings Be Adjusted and Monitored?
All settings of this fan speed controller can be adjusted and monitored via Modbus RTU communication. All you need to do is download our free 3SM Software from our website and you get the motor control type you wish – manual or digital, i.e. local or remote!
What Type of Temperature Probe is Required for the Controller?
To measure the temperature in the greenhouse, you need to connect a PT500 temperature probe to the controller and place its sensor in an appropriate point. Based on the measured temperature the controller works towards reaching the setpoint selected via the potentiometer on the enclosure or via Modbus (bear in mind that Modbus mode overrides manual control).
Can Multiple Motors Be Connected to This Controller?
You can connect several motors to the controller as long as the current limit of 6 A is not exceeded. In this case all of them will run at the same speed.
What is the Purpose and Function of the Unregulated Output?
This controller features an unregulated output which is active when the motor is enabled. It is called so since it is either ON (230 Volt) or OFF (0 Volt). If the supply voltage is connected to L and N, the unregulated output is active while the motor is in operation. The unregulated output is used to control external devices such as dampers, relays, run indicators, etc. that can work without the need to regulate the incoming voltage. In other words the GTE regulates the fan through the so called “regulated output” via controlling the voltage with the option to regulate one more device, but this time the voltage is “unregulated”, i.e. either 0 V or 230 V. When the fan stops, the connected external device will be disabled – the damper will be closed or the run indicator will switch off. While the fan is working, the damper will remain open and the indication light will be switched on. The maximum current of the unregulated output is 2 A.
What Are the Safety and Durability Features of the Controller's Enclosure?
To make sure our products last long, work well and are fail-safe, we manufacture our enclosures. This industrial enclosure is made of R-ABS, V plastic - high-grade material is specially developed for engineering applications in the electronics sector or in the automotive, e.g. for car interior parts, wherever maximum performance at high temperatures is required. This material is flame retardant in case of fire, solid and provides good protection against impacts. Its protection class is IP54 against dust, dirt and water.
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