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What is IP protection?

Protection against ingress of solid objects and liquids IP rating stands for “Ingress Protection rating”. However, sometimes, “International Protection rating”

How to control EC fan speed?

An EC motor or Electronically Commutated motor can be seen as an AC motor with integrated fan speed controller. The EC motor requires an indication of the desir

How to regulate AC fan speed?

In general, there are two ways to regulate AC fan speed: 1. Reducing the motor voltageReducing motor voltage reduces both motor speed and motor torque - t

What is PoM or Power over Modbus?

Many Sentera products can share information via Modbus communication. Modbus is a serial communication protocol that uses RS485 technology. Sentera Modbus-compa

What is an electronic fan speed controller for AC motors?

Electronic fan speed controllers offer continuous variable fan speed control by reducing the motor voltage. To reduce the motor voltage, they use phase angle co

What is Ecodesign regulation EU 2019-1781?

The European Union (EU) Ecodesign Directive is focused on making sure we get the maximum possible performance out of any energy that is consumed. The directive

What does IE2 mean for VFDs?

The Ecodesign regulation EU 2019/1781 covers 3-phase standard drives with a diode rectifier in the range 0.12 kW ≤ Pn < 1000 kW. After 1st July 2021, the power

How to measure air volume flow or air velocity?

A balanced ventilation system supplies fresh air to the building while it extracts stale air from the building. To check whether there is sufficient ventilation

What is a transformer fan speed controller for AC motors?

Transformer fan speed controllers regulate fan speed in steps by reducing the motor voltage. Usually fan speed can be regulated from low to high speed in 5 step

How to find a product on the website?

The website of Sentera offers a comprehensive and user-friendly approach to finding a product, providing multiple ways to cater to various search preferences an

How to interpret article codes of Sentera sensors?

How to interpret article codes of Sentera sensors? The Sentera article codes follow a certain logic. Every character in the code stands for a characteristic of

How do destratification fans work?

Destratification is a simple, yet effective solution for heating savings in areas with high ceilings like warehouses and communal spaces. A destratification fan

What is a Modbus Network Bus Terminator or NBT?

Disruptions in a communication network can be prevented by using Network Bus Terminators or NBTs. Modbus Network Bus Terminators reduce voltage reflections in t

What should I pay attention to when creating a Modbus RTU network?

What is (RS485) Modbus RTU communication? Modbus RTU is an open serial protocol derived from the master/slave architecture (now client/server) originally develo

What is a control signal?

A control signal is typically used to control an electronic device. This can be a fan speed controller, a damper actuator, an EC fan, etc. An example: Telling a

What is the difference between VDC and VAC?

Alternating Current (AC) and Direct Current (DC) are the two types of electric currents that coexists in our daily life. They are both used for supplying power

What type of fan speed controller should I choose?

There are many different types of fan speed controllers available for AC motors. That doesn't make the choice any easier. We will briefly list the main advantag

What are the advantages of Modbus communication over analogue signals?

Modbus communication offers several significant advantages over traditional analogue signals, particularly in industrial and home and building automation applic

What is the minimum current to activate a TRIAC?

TRIode for Alternating Current A TRIAC (TRIode for Alternating Current) is an electronic component that either allows electrical current to pass or stops it.

What types of CO2 sensors exist?

Carbon dioxide (CO2) is a natural component of the air and a key indicator of indoor air quality. Since CO2 mainly originates from human respiration, its concen

What are the key components of an air handling unit?

The main parts of an air-handling unit (AHU) are shown on the drawing below. This picture will be used as an example; however, many other different combinations

What is the best placement for sensors on air handling unit?

Sentera offers a wide range of control solutions for your air-handling units (AHU). These solutions include various sensors, a certain amount of which come pre-

What are the most common types of heat recuperators in AHU and how do they work?

The three most common types of energy recovery heat exchangers (recuperators) in air handling units (AHUs) are: • Plate heat exchangers • Rotary heat ex

What are 3-speed control switches?

3-speed control switch for three-speed AC motors With our SMT-1-30-series you can manually control 3-speed AC fans in 3 steps. They are available with or withou

What is a standard European flush-mounting wall box?

Flush-mounting boxes for solid or hollow walls An important consideration when choosing a flush-mounting box is whether it should be installed in a solid or h

How does a photoacoustic spectroscopy (PAS) CO2 sensor work?

Photoacoustic spectroscopy (PAS) sensors use the same working principle of the absorption wavelengths but unlike the NDIR sensors that measure the receiving lig
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