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What is the maximum cable length for a Modbus RTU network?

For Modbus communication, the total cable length per segment must not exceed 1.000 m. (Total cable length = sum of the main network line and all branches). Here

What cable to use for a Modbus network?

Sentera products share information via Modbus communication. Modbus is a serial communication protocol that uses RS485 technology. Based on that technology,

What motor insulation class is required in combination with a fan speed controller or VFD?

The insulation of the motor windings prevents short circuits in the windings or connection of the winding to the protective earth. The class of insulation of a

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

Why measure CO2?

Demand-controlled ventilation based on CO2 measurements Demand-controlled ventilation systems use CO2 concentrations within a building to know whether adequate

What is Modbus RTU communication?

Open communication protocol Modbus is an open communication protocol, meaning that it's free for manufacturers to build into their equipment without having to

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

Can I use a Sentera transmitter for agriculture or horticulture applications?

Sentera has products for a wide range of applications. Agriculture is one of those. Sentera products in this category measure CO2, soil moisture, relative humid

What is a potentiometer?

A potentiometer is a device to generate a control signal. A potentiometer is an electronic component that allows you to vary the resistance in a circuit. It co

How does an NDIR CO2 Sensor Work?

NDIR stands for “nondispersive infrared”. Today, it is the most common sensor type for the measurement of CO2, carbon dioxide, concentrations in an environment.

How many EC fans can I control with a 0-10 Volt signal?

Input impedance EC motor Every power source has a limit, also the source of a 0-10 Volt signal is limited. Sentera expresses the limit of a 0-10 Volt signal as

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

How does an electric autotransformer work?

An electric autotransformer is a type of transformer that has a single winding with multiple voltage taps. It operates based on the principles of electromagneti

What is an analogue 0-10 Volt signal

An analogue 0-10 Volt signal is a continuous electrical signal that represents varying levels of voltage between 0 and 10 volts. It varies continuously between

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 types of NDIR sensors exist?

General characteristics of all NDIR sensors NDIR (Non-dispersive Infra-red) sensing has become the leading method for measuring CO2 concentration. This techno

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-
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