Name: Potentiometer for EC fan with OFF position | Sentera Controls | SDP-E0US-AT
Brand: Sentera controls
SKU: SDP-E0US-AT
Price: 43.38 EUR
Availability: InStock

Product description

Potentiometer for EC fan with OFF position | Sentera Controls | SDP-E0US-AT

SDP-E0US-AT – Sentera Controls potentiometer with OFF position, designed for EC fans and other equipment requiring a stepless control signal. Supplied with 5–24 VDC, the Ao output is switched by jumper to voltage (0–100 % Us), current (0–20 mA) or PWM (1 kHz) mode; the min. and max. limits are set with two trimmers.

Key idea:
One knob performs two functions: turned fully to the left, the fan is switched off (OFF); turned clockwise, the speed changes steplessly from the set minimum to the maximum.

Power supply
5–24 VDC

Ao output
0–100 % Us / 0–20 mA / PWM 1 kHz

OFF position
Yra

Protection
IP44 flush-mounted / IP54 surface-mounted

Operating principle

The potentiometer is installed in the room where the operator wants to change the ventilation intensity, while the controlled EC fan or controller may be in a technical room. A 5–24 VDC supply (Us, GND) and the output signal (Ao, GND) are connected to the EC motor control input.

This is not a power controller: only signal current flows through the potentiometer (own current consumption – 19 mA). The EC fan electronics change the motor speed themselves according to the received 0-10 V, 0-20 mA or PWM command, so the motor power has no influence on the choice of potentiometer.

The output type is selected by jumper: voltage 0–100 % Us (load RL ≥ 50 kΩ), current 0–20 mA (RL ≤ 500 Ω) or PWM 1 kHz with a 3.3 VDC or 12 VDC level (RL ≥ 50 kΩ). The MIN trimmer is set to 0–80 % Us, MAX – 20–100 % Us; a control range of no less than 20 % is always maintained between them. If MIN is set higher than MAX, the control is reversed (from max. to min.).

Engineer's note: in voltage mode the output is proportional to the supply voltage. With a 10 VDC supply a 0–10 V signal is obtained; with a 24 VDC supply the output must be limited with the MAX trimmer (≈ 42 % Us ≈ 10 V) so that the EC motor's 0-10 V input does not receive excessive voltage. In the OFF position (knob fully anticlockwise) the fan is stopped.

Benefits SDP-E0US-AT?
One potentiometer suits 0-10 V, 0-20 mA and PWM controlled EC fans and actuators, and the limits are set on site with trimmers – no computer or programming needed.

Technical specifications

Product type	Potentiometer (control signal source) for an EC fan
Manufacturer / code	Sentera Controls / SDP-E0US-AT
Series	SDP-E0US (AT – with OFF, BT – without OFF, DC – with dry contact)
Supply voltage (Us)	5–24 VDC
Current consumption	19 mA
Ao output – voltage	0–100 % Us, RL ≥ 50 kΩ
Ao output – current	0–20 mA, RL ≤ 500 Ω
Ao output – PWM	1 kHz, 3.3 VDC or 12 VDC level, RL ≥ 50 kΩ
Output type selection	Jumper (voltage / current / PWM)
MIN trimmer	0–80 % Us
MAX trimmer	20–100 % Us (always a range of ≥ 20 % between the limits)
Control direction	Min.→max. (factory default) or max.→min. (MIN > MAX)
OFF position	Yra
Terminals	Spring-type; solid wire 1.0–1.5 mm², stranded with ferrule 0.5–1.0 mm², stripping length 7 mm
Installation	Flush-mounted (IP44) or surface-mounted (IP54), 4× ø3.5 mm mounting holes
Protection class	IP44 / IP54 (EN 60529)
Operating environment	0–50 °C, < 95 % rH non-condensing
Weight	0.14 kg (net)
Compliance	LVD 2014/35/EU, EMC 2014/30/EU, RoHS 2011/65/EU

Manufacturer documentation

✔ Recommended by Elektrotechnikos sprendimai

Original manufacturer documentation – technical data, wiring diagrams and installation instructions.

Main functions

Three output types – 0–100 % Us, 0–20 mA or PWM 1 kHz – one model for various EC fans and actuators.
MIN / MAX trimmers – the minimum speed ensures the hygienic air volume, the maximum limits noise and airflow.
Reverse control – if MIN is set higher than MAX, the signal decreases as the knob is turned clockwise.
Wide supply range 5–24 VDC – suitable for 10 VDC, 12 VDC or 24 VDC sources.
OFF position – when the knob is turned fully to the left, the signal is cut off and the fan stops.
Universal enclosure – flush-mounted (IP44) or surface-mounted (IP54) installation, protected against water splashes.

Where is it used?

Heat recovery units and extract fans with EC motors for apartments and houses
Offices, meeting rooms, classrooms – manual control of ventilation intensity
Damper actuators with 0-10 V / 0-20 mA control
Plant rooms where the controller or fan is far from the user
Control signal for Sentera EVS / MVS controllers or FI-E frequency inverters

On-demand operation

For the ventilation installer.
One model with three output types – fewer different items in stock and on site.

For the automation specialist.
Limits and direction are set on site with trimmers, without programming tools.

For the user.
A simple knob in the room – speed is changed steplessly, without steps.

Application guide: how it is used in practice

SDP-E0US-AT can be adapted to different sites – only what is connected to its output changes:

Site	What is connected	Result	Installer's note
Apartment or house with a heat recovery unit	Ao → EC fan 0-10 V input, Us – 10 VDC source	The occupant sets the ventilation intensity	When supplied with 24 VDC – limit to ≈ 10 V with the MAX trimmer
EC duct fan in an office	Ao (0-10 V) → EC motor control input	Speed changes steplessly, the min. limit ensures the hygienic air volume	Set the MIN trimmer according to the design min. flow
Damper with a proportional actuator	Ao (0-10 V or 0-20 mA) → actuator control input	Manual damper position setting	In current mode, load ≤ 500 Ω
EC fan with a PWM input	Ao (PWM 1 kHz, 3.3 / 12 VDC) → PWM input	Stepless speed control without an analogue signal	Check what PWM level the fan accepts
AC fan with an electronic controller	Ao (0-10 V) → Ai input of a Sentera EVS or MVS controller	Potentiometer in the room, controller in a technical room	Connect the signal GND to the controller GND

How to select the controller current

Rated current of the motor(s)	Recommended model
OFF position needed, supply 5–24 VDC	SDP-E0US-AT (OFF, trimmers) ← this model
Continuous min. flow needed (no OFF), 5–24 VDC	SDP-E0US-BT (no OFF, trimmers)
Dry contact for an external device needed, 5–24 VDC	SDP-E0US-DC (dry contact 1 A)
OFF position and Modbus RTU needed, 24 VDC	SDP-M010-AT (OFF, Modbus RTU)
Modbus RTU needed without OFF position, 24 VDC	SDP-M010-BT (no OFF, Modbus RTU)
Modbus RTU and dry contact needed, 24 VDC	SDP-M010-DC (Modbus RTU, dry contact 1 A)
Simple 0–Us signal with OFF and dry contact needed	SDP-X10K-NA (10 kΩ, dry contact 1 A)

Rule: first determine which signal (0-10 V, 0-20 mA, PWM) and which supply voltage are needed, then whether an OFF position, a dry contact or Modbus RTU is required. Motor power and current have no influence on the selection – only the control input load matters (≥ 50 kΩ in voltage and PWM mode, ≤ 500 Ω in current mode). Several EC fans in parallel – only if the total input resistance meets this limit.

When to choose another solution: For Modbus RTU control and settings – SDP-M010 series (AT / BT / DC); for supply directly from the 230 VAC mains – SPV-8 or MTVN1 series; for digital control with display and steps – RDCV9-AD; for AC fans – electronic EVS-1 controllers.

Pros

OFF position to switch off the fan
Three output types: voltage, current, PWM
Wide supply range 5–24 VDC
MIN / MAX limits and reverse control with trimmers
Low current consumption – 19 mA
Flush-mounted IP44 or surface-mounted IP54 installation

Cons / limitations

A separate 5–24 VDC supply is required – cannot be supplied directly from 230 VAC
In voltage mode the output equals % of Us – with a 24 VDC supply, MAX must be limited
No Modbus RTU – settings are changed only with trimmers
This is a signal source – it does not directly control AC motor speed

Safety and installation notes

Installation and connection must be carried out by a qualified electrician with the supply to all connected devices disconnected.
Supply voltage – no higher than 24 VDC; connecting 230 VAC to the terminals is prohibited.
Before switching on the EC fan, check the output voltage – it must not exceed the permissible limit of the motor control input.
Observe the load limits: ≥ 50 kΩ in voltage and PWM mode, ≤ 500 Ω in current mode.
Use at a temperature of 0–50 °C with relative humidity < 95 % non-condensing.

Quick selection guide

5–24 VDC

0-10 V / 0-20 mA / PWM

OFF

IP44 / IP54

For EC fans

Suitable when you need:

control EC fan speed manually and steplessly;
set the min. and max. speed without programming;
switch off the fan with the same knob;

Check before use:

the EC fan control input type (0-10 V, 0-20 mA or PWM) and its impedance;
the available 5–24 VDC power source;
whether an OFF position, a dry contact or Modbus RTU is needed.

Important reminder: SDP-E0US-AT is a control signal source, not a power controller – the motor current does not flow through it.

FAQ

Does it have an OFF position?
Yes, by turning the knob fully counter-clockwise.

Can it be powered from 230 VAC?
No. A 5–24 VDC source is required; for a 230 VAC supply choose the SPV-8 or MTVN1 series.

How do I get an exact 0-10 V signal?
Supply 10 VDC or, when supplying a higher voltage, limit the output to 10 V with the MAX trimmer.

Is it suitable for PWM-controlled fans?
Yes, by selecting PWM mode with a jumper (1 kHz, 3.3 VDC or 12 VDC level).

Can it control several EC fans?
Yes, provided the total resistance of the parallel-connected control inputs is within the load limits.

Can the control direction be reversed?
Yes – if the MIN trimmer is set higher than MAX, the output changes from max. to min.

Potentiometer for EC fan with OFF position | Sentera Controls | SDP-E0US-AT

Sentera SDP-E0US-AT – potentiometer for EC fans with OFF position: 5–24 VDC supply, 0–100 % Us / 0–20 mA / PWM 1 kHz output, MIN / MAX trimmers, IP44 / IP54 – stepless manual ventilation control.

Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.

Attributes

Manufacturer

Sentera controls

CE certificate – a guarantee of safety, quality, and compliance

This product is marked with the CE label, which confirms that it complies with all applicable European Union directives and regulations. CE marking is not just a formality – it is an important indicator of quality and safety, ensuring that the product has been properly assessed, tested, and can be safely used throughout the EU market.

CE certification means that the product has been evaluated according to the main criteria:

Safety requirements – ensures that the product does not pose a risk to the user or the environment
Electromagnetic compatibility (EMC) – the device does not interfere with other equipment and is resistant to external disturbances
Environmental standards – complies with current ecological and material usage requirements
Operational reliability – the product is suitable for long-term use according to its intended purpose

CE marking allows this product to:

be legally supplied and used in all European Union countries
ensure a high level of quality and safety
be used in residential, commercial, and industrial environments

The CE mark is a declaration of the manufacturer’s responsibility, confirming that the product complies with all applicable standards and has been assessed according to EU legislation.

What does this mean for you as a buyer?

Safe use in everyday activities
Reliable performance and reduced risk of failure
Compliance with EU standards and requirements
Suitability for professional solutions

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Product Catalog

Potentiometer for EC fan with OFF position | Sentera Controls | SDP-E0US-AT

Potentiometer for EC fan with OFF position | Sentera Controls | SDP-E0US-AT

Operating principle

Technical specifications

Manufacturer documentation

Main functions

Where is it used?

On-demand operation

Application guide: how it is used in practice

How to select the controller current

Pros

Cons / limitations

Safety and installation notes

Quick selection guide

FAQ

Potentiometer for EC fan with OFF position | Sentera Controls | SDP-E0US-AT

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