With the ErP-directives becoming more and more important, there will be a shift from AC-motors towards EC-motors which are much more energy efficient.
We are therefore constantly developing new products and revising existing products to be able to control these EC-motors as accurately as possible.
We have developed different potentiometers for stepless control of EC-motors, AC fan speed controllers or damper actuators with an analogue input. They are divided into 3 groups, depending on the needed supply voltage: Low supply voltage (3-24 VDC / 24 VAC), 230 VAC or unpowered 10 Kohm potentiometers. From this last group, the MTP-X10K-NA is by far the most popular potentiometer used to control EC-motors. Our latest developments are situated in the group of “low supply voltage” potentiometers so let’s take a closer look to this range. Often the supply voltage for these potentiometers can come directly from the EC fan or the frequency inverter. The SDP-M010-series needs 24 VDC supply voltage. They have Modbus RTU communication, which makes it possible to remotely control and monitor these potentiometers. They are available with OFF-position (-AT), without OFF-position (-BT) or with OFF-position and a dry contact (-DC) to remotely control an external device. This potentiometer controls the fan speed from low to high but this can be inversed via the Modbus holding registers. The same goes for the minimum and maximum output values. The enclosure is designed as such that it allows flush or surface mounting. In order to comply with most motors, you can choose between different output types: 0-10 Volt / 0–20 mA / 0–100% PWM. When the output overwrite is enabled, you can – by the value you enter in the Modbus holding register – overrule the function of the rotary knob and remotely control the analogue output of the potentiometer. The MTP-D010-series needs a supply voltage between 3–15 VDC. Also these are available with OFF-position (-AT), without OFF-position (-BT) or with OFF-position and a dry contact (-DC) to remotely control an external device. The high and low ventilation limits are adjustable via 2 trimmers. The lowest level lies between 10 – 70% of the supplied voltage and the highest level between 30 – 100%. The enclosure is designed as such that it allows flush or surface mounting. Our latest new development is the SDP-E0US-series, also available in the –AT, -BT and –DC version. These potentiometers need a supply voltage between 5-24 VDC. Both the minimum and maximum output levels can be adjusted in the range of 0 – 100% of the supplied voltage. This makes it possible to inverse the control output (from minimum to maximum or vice versa). There is always a minimum control range of 20% between the minimum and maximum value determined by the 2 trimmers. The splash-proof enclosure allows flush or surface mounting. As last alternative in the range of potentiometers that need a low voltage supply we have our MTP-G010-AT. This potentiometer needs 24 VAC or 24 VDC power supply and has an OFF-position. It gives a 0-10 V output signal and the high and low ventilation limits are again adjustable via 2 trimmers. The low level lies between 0 - 7 VDC and the high level between 3 - 10 VDC. The splash-proof enclosure allows flush or surface mounting.
Recent news
19/09/2023
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.>>>
12/09/2023
DRM - I/O module with relay outputs and Modbus RTUAn I/O module with relay outputs is a device commonly used in industrial and automation applications to interface between a control system (such as a programmable logic controller or PLC) and external devices or equipment. >>>
04/09/2023
Temperature-based fan speed control for AC motorsWe need controls and control systems because, in our modern age of technology, they make our lives more convenient, comfortable, efficient and effective. HVAC controls enable equipment to operate effectively and sometimes give the ability to change their actions as time goes by and conditions or occupancies change. >>>
07/08/2023
TCMF8 – HVAC controller for AC fansQuality ventilation in rooms with high ceilings can be a challenge. Warm air in these rooms rises while cold air lingers at human height. We keep finding it chilly even though there is enough warm air in the room, and turn up the heating as a result. This is not necessary if destratification is provided, pushing the warm air back down.>>>
24/07/2023
Sentera’s New CAV ControllerFollowing the best practices in the HVAC, we designed the new series of circular electrically operated CAV dampers also featuring differential pressure control.
>>>
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.jpg "New ECMF8 Series of Customizable EC Fan Speed Controllers")
.jpg "DRM - I/O module with relay outputs and Modbus RTU")
.jpg "Temperature-based fan speed control for AC motors")
.jpg "TCMF8 – HVAC controller for AC fans")
.jpg "Sentera’s New CAV Controller")
