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EU declaration conformity
Fan speed controller | day-night function | TK monitoring | 5 A
Product description
Two-speed controller for single-phase motors with thermal contact (TC). The maximum (total) motor current is 5 A.
The controller has two independent 5-speed switches to select the two optimum fan speeds. When the motor is active, both speeds can be switched via a dry contact input.
The TK monitoring function stops the motor in case of overheating. The motor restarts automatically after a power failure. Alarm and uncontrolled outputs can be used to control external devices to issue warnings or check normal operation.
The fan speed is controlled by reducing the motor voltage through an autotransformer. This technology results in a perfectly sinusoidal output voltage and guarantees quiet motor operation.
The enclosure can be surface mounted and is IP54 rated against dirt, dust and moisture.
Additional specifications and description
The series
Sentera’s SC2A1 series is a simplified fan speed control solution featuring two optimal fan speed setting via the built-in knobs on its enclosure. These features can be used to select different day and night temperatures. In this way, apart from more comfortable ventilation, considerable energy savings can be realized.
The technology
Transformer fan speed controllers regulate speed of AC voltage controllable motors in 5 steps. Transformer-based fan speed controllers offer a range of benefits, making them a desirable choice for speed control solutions. Transformer-based controllers are known for their durability and ability to withstand harsh conditions. Also, they are easy to install and operate. They provide simple control in steps, allowing users to adjust the speed of the AC voltage controllable motors according to their requirements. They are known for their energy efficiency. By reducing the motor voltage, they help optimize power consumption and minimize energy waste. In comparison to more complex speed control solutions, transformer-based controllers offer a cost-effective option for regulating motor speed. Since transformer-based controllers do not rely on electromagnetic excitation in motors, they help minimize noise generation during operation. This makes them particularly suitable for noise-sensitive environments where quiet operation is desired. What is more, they are durable, which results in extended service life. With proper maintenance, they can provide reliable speed control for a long period.
Special feature
The series features selection of two optimal motor speeds, typically for day and night control or different operating conditions. These speeds can be switched using the dry contact input to connect a thermostat or timer/clock. This enables energy savings and increased comfort by adjusting the motor speed based on specific requirements.
Light indication
The enclosure of the unit features two indicator lights – a green one that illuminates when the transformer controller is in operation and a red one indicating TK protection has been activated. This provides a visual indication of its status and helps observe its functionality.
Thermal motor protection monitoring
The series features an input (TK) that can be connected if your motor features thermal protection, otherwise this needs to be bridged.
Alarm output
The alarm output (230 VAC) is activated when motor problems occur. It can be used to generate alerts; for instance, in case of motor overheating, the alarm output is activated. The TK monitoring function will disable the motor to prevent further damage. The alarm output can control a warning light.
Normally open and normally closed inputs
Via these two inputs, the motor can be remotely enabled or disabled. There is a normally open (OC) input and a normally closed (CC) input available.
For example: via a remote switch, connected to the normally open input, the motor can be enabled or disabled. A smoke alarm is connected to the normally closed input. If a smoke alarm occurs, the motor will be disabled no matter what the status of the other input is.
Unregulated output
An unregulated output refers to a power supply or voltage source that does not have any built-in regulation to maintain a stable output voltage despite fluctuations in input voltage or load conditions. In contrast, a regulated output provides a constant voltage regardless of variations in the input or load. As standard, Sentera’s transformer fan speed controllers feature an unregulated output with maximum current of 2 A.
Enclosure specifics
Enclosures play an important role in protecting the electronics from various external factors such as debris, dust, water, and mechanical impact. Their quality does make a difference, so we produce them ourselves. SC2A1 series features a housing made from a specific material called r-ABS (reinforced Acrylonitrile Butadiene Styrene) with a VO flame-retardant rating according to the UL94 standard. This material is fire-resistant and the enclosure is designed for surface installation. The r-ABS material is reinforced to provide enhanced mechanical properties, ensuring increased fire safety and reduced flammability. The protection class is IP54.
Sentera’s SC2A1 series is a simplified fan speed control solution featuring two optimal fan speed setting via the built-in knobs on its enclosure. These features can be used to select different day and night temperatures. In this way, apart from more comfortable ventilation, considerable energy savings can be realized.
The technology
Transformer fan speed controllers regulate speed of AC voltage controllable motors in 5 steps. Transformer-based fan speed controllers offer a range of benefits, making them a desirable choice for speed control solutions. Transformer-based controllers are known for their durability and ability to withstand harsh conditions. Also, they are easy to install and operate. They provide simple control in steps, allowing users to adjust the speed of the AC voltage controllable motors according to their requirements. They are known for their energy efficiency. By reducing the motor voltage, they help optimize power consumption and minimize energy waste. In comparison to more complex speed control solutions, transformer-based controllers offer a cost-effective option for regulating motor speed. Since transformer-based controllers do not rely on electromagnetic excitation in motors, they help minimize noise generation during operation. This makes them particularly suitable for noise-sensitive environments where quiet operation is desired. What is more, they are durable, which results in extended service life. With proper maintenance, they can provide reliable speed control for a long period.
Special feature
The series features selection of two optimal motor speeds, typically for day and night control or different operating conditions. These speeds can be switched using the dry contact input to connect a thermostat or timer/clock. This enables energy savings and increased comfort by adjusting the motor speed based on specific requirements.
Light indication
The enclosure of the unit features two indicator lights – a green one that illuminates when the transformer controller is in operation and a red one indicating TK protection has been activated. This provides a visual indication of its status and helps observe its functionality.
Thermal motor protection monitoring
The series features an input (TK) that can be connected if your motor features thermal protection, otherwise this needs to be bridged.
Alarm output
The alarm output (230 VAC) is activated when motor problems occur. It can be used to generate alerts; for instance, in case of motor overheating, the alarm output is activated. The TK monitoring function will disable the motor to prevent further damage. The alarm output can control a warning light.
Normally open and normally closed inputs
Via these two inputs, the motor can be remotely enabled or disabled. There is a normally open (OC) input and a normally closed (CC) input available.
For example: via a remote switch, connected to the normally open input, the motor can be enabled or disabled. A smoke alarm is connected to the normally closed input. If a smoke alarm occurs, the motor will be disabled no matter what the status of the other input is.
Unregulated output
An unregulated output refers to a power supply or voltage source that does not have any built-in regulation to maintain a stable output voltage despite fluctuations in input voltage or load conditions. In contrast, a regulated output provides a constant voltage regardless of variations in the input or load. As standard, Sentera’s transformer fan speed controllers feature an unregulated output with maximum current of 2 A.
Enclosure specifics
Enclosures play an important role in protecting the electronics from various external factors such as debris, dust, water, and mechanical impact. Their quality does make a difference, so we produce them ourselves. SC2A1 series features a housing made from a specific material called r-ABS (reinforced Acrylonitrile Butadiene Styrene) with a VO flame-retardant rating according to the UL94 standard. This material is fire-resistant and the enclosure is designed for surface installation. The r-ABS material is reinforced to provide enhanced mechanical properties, ensuring increased fire safety and reduced flammability. The protection class is IP54.
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