Potentiometers with minimum and maximum limit, working from low to high speed or vice versa, with 0-10 volts, 0-20 mA or PWM output, infinitely adjustable or with adjustable steps (…) were already part of our assortment. Today we have expanded our potentiometer family with the SDP-M010 series that are equipped with Modbus RTU. As a result, not only are the settings available via the Modbus registers, but from SenteraWeb or your Building Management System you can also read the position of the potentiometer and even overwrite the output.
Manual control We mainly know a potentiometer as a device with which we can directly control the speed of an EC fan via a rotary knob or the speed of an AC fan via a speed controller. This unit, which in itself is a very simple device and is built into almost every ventilation application, had limited possibilities until we developed this version with Modbus.
Apart from demand-based ventilation, where sensors or a network of sensors determine how much ventilation is needed, manually controlled ventilation remains also very popular. A choice should be made between a very simple manual control with a potentiometer, or a fully automatic control based on sensors, where manual intervention is difficult, usually even impossible. However, thanks to the development of this Modbus RTU potentiometer, numerous new combinations and possibilities are available.
Potentiometer with Modbus RTU communication Whether it concerns small installations where one potentiometer controls one fan or valve, or a large installation with several rooms where also sensors are used, this new potentiometer can prove its worth. Use your creativity to create new solutions. These are some ideas:
Applications where you will manually control fan speed but where, thanks to the presence of Modbus RTU, you can overrule the potentiometer remotely. Think of automatic switch-off outside working hours or during holiday periods, or free cooling during summer nights. You can take control via SenteraWeb but also via any building management system that is Modbus RTU compatible.
Applications where we will combine demand-based ventilation with manual control. Think of meeting rooms or classrooms where, for example, it becomes possible to additionally “clean” the room during breaks. After the measured value of the sensor has fallen back below the desired value, the automatic control - based on the measurements of the sensor – will take over again. So efficient ventilation without unnecessary energy loss.
Sentera's Modbus RTU potentiometers offer many additional options. They can all be set via the Modbus registers:
Direction of rotation from minimum to maximum or from maximum to minimum
Adjustable minimum and maximum output value
Output signal type selectable from 0-10 VDC, 0-20 mA, 0-100% PWM
The SDP-M010-BT has no zero position and thus will not have an output lower than the minimum value set via Modbus
The SDP-M010-DC has a dry contact output when completely turned anticlockwise that allows external equipment to be turned on or off
CO2 monitoring in schoolsSentera CO2 meters help to reduce the spread of the COVID-19 virus in this school in Sint-Niklaas, Belgium. Continuously measuring CO2 concentrations in classrooms provides certainty about indoor air quality. Good indoor air quality is essential to prevent the spread of the COVID-19 virus.>>>
Wine Cellars VentilationPassive ventilation or active ventilation? Depending on your wine cellar type, we have the solution to suit your needs – from the simplest sensor to on-demand ventilation. >>>
Ventilation in greenhousesVentilation is a crucial aspect of greenhouse management as it plays a vital role in maintaining the right environmental conditions for plant growth. Proper ventilation in greenhouses helps regulate temperature, humidity, and carbon dioxide levels, ensuring optimal conditions for plants. >>>
Sentera I/O modules are Modbus RTU compatibleSentera I/O modules are Modbus RTU compatible. They are of course used in Sentera HVAC solutions, but because they are universal they can also be useful for your project or product.
Fire alarm panels, motion detection, door contacts, etc. ... Sometimes your (HVAC) application interacts with external equipment. Sentera offers a full range of converters or I/O modules. They are widely used in industrial and automation applications, but home automation or ventilation solutions for domestic use also make full use of I/O modules. I/O modules are the interface between a controller and external equipment.>>>
New ECMF8 Series of Customizable EC Fan Speed ControllersOne of Sentera’s most recent developments is the ECMF8 series of EC fan speed controllers. They can control one or two EC motors or VFDs, which is why we call them “dual”. The series is a versatile solution consisting of 3 product versions, each featuring different control options.>>>
Sentera provides innovative, easy-to-use control solutions for HVAC installations and ventilation systems. How to optimise your comfort, indoor air quality, safety and overall wellbeing? We have the answer!