Product description

Differential pressure controller with 2 setpoints | 0-2000Pa | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VDC | IP65 | Sentera Controls | SPS2F-2K0

The SPS2F-2K0 is a Sentera Controls differential pressure controller with two setpoints and integrated PI control, range 0–2000 Pa. It directly controls EC fans, frequency converters or other devices and maintains the set pressure or air volume, while switching between the two setpoints is done with a dry contact or via Modbus RTU.

Key idea:
Two setpoints are a simple day / night or high / low mode solution: a timer, switch or motion sensor switches the contact, and the controller immediately moves to the other pressure value. No BMS logic or second controller needed.

Measuring range
0–2000 Pa

Output
0-10 VDC / 0-20 mA / PWM (OC) + Modbus RTU

Power supply
24 VDC, 4-wire

Setpoints
2 (switched by OC contact or Modbus)

Operating principle

The controller is wall-mounted; pressure tubes (PSET-PVC-200 or PSET-QF-200) are connected to the aluminium nozzles "+" and "−", and power (Vin, GND), Modbus RTU (A, /B), output AO1 and a dry contact OC for setpoint switching are connected at the terminals. The F type is powered only with 18–34 VDC and connected with 4 wires; if G and F types are powered from the same AC transformer with a common GND, a short circuit is possible – use separate transformers or controllers of the same type.

The sensor measures the pressure difference within the 0–2000 Pa range, the controller works in pressure difference or air volume mode (when the fan K factor is known), and the measuring range is selected automatically according to the active setpoint. The integrated PI algorithm with an autotune function compares the measured value with the active setpoint and changes the output signal 0-10 VDC, 0-20 mA or PWM (open collector) – the type is selected with switch SW1.

Result – closing the OC contact (or a command via Modbus RTU) activates the second setpoint, so the same system runs in day / night or high / low pressure mode without an additional controller or BMS programming.

Benefits SPS2F-2K0?
Two pressure setpoints, PI control, selectable output and Modbus RTU in one IP65 enclosure – simple energy-saving day / night ventilation without additional automation.

Technical specifications

Product type	Differential pressure controller with 2 setpoints
Manufacturer / code	Sentera Controls / SPS2F-2K0
Series	SPS2 (0–2000 / 0–6000 Pa; F – 24 VDC, G – 24 VAC / VDC)
Measuring range	0–2000 Pa
Power supply	18–34 VDC, 4-wire connection; max. 0.96 W, Imax 40 mA
No-load current	10–20 mA (18–34 VDC)
AO1 output	1 analog 0-10 VDC / 0-20 mA or digital PWM (open collector), selectable with switch SW1
Setpoints	2 – switched by dry contact OC or via Modbus RTU; High/Low, Day/Night modes
Control	PI, autotune, K factor setting
Controlled quantities	Pressure difference or airflow (when the K-factor is known)
Accuracy	±3 % (analog voltage output)
Long-term stability	±1 % per year
Communication	Modbus RTU (RS485), NBT line-end jumper; configuration with Sensistant or 3SModbus
Indication	Power LED (green), status LED5 (blue), Modbus LED (green)
Button	SW2 – sensor calibration and Modbus register reset
Pressure nozzles	Aluminium
Protection class	IP65 (EN 60529)
Operating environment	+10…+60 °C, < 95 % rH non-condensing
Wires / cable gland	0.75 / 1.5 mm²; cable gland clamping range 3–6 mm
Weight	0.13 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

Two setpoints – day / night or high / low pressure mode without additional controllers.
Switching by OC contact – a timer, switch, motion sensor or BMS relay switches the setpoint.
PI control and autotune – stable pressure maintenance and quick start-up.
Selectable output – 0-10 VDC, 0-20 mA or PWM (open collector) – via switch SW1.
Air volume mode – constant m³/h by the fan K-factor.
Modbus RTU – setpoints and parameters are changed from the BMS; NBT jumper for the end of the line.
Automatic range selection – the measuring range adapts to the selected setpoint.

Where is it used?

Range 0–2000 Pa – for duct pressure in most ventilation systems
Ventilation of offices and schools with day / night mode
VAV and CAV systems with EC fans
Clean room pressure and airflow control
Sites that need two operating modes without a BMS
Rooms with a motion sensor – a higher setpoint only when people are present
Duct pressure maintenance with frequency-converter-controlled fans

On-demand operation

For school and office ventilation contractors.
The 0–2000 Pa range covers typical duct pressures, and the day/night setpoints are switched by a timer.

For building administrators.
Day/night mode is switched by a timer, switch or motion sensor via an OC contact – no BMS programming.

For ventilation unit manufacturers.
Type F is powered only at 18–34 VDC (max. 0.96 W) and wired with 4 wires – suitable for the equipment's 24 VDC circuit.

Practical application

If a school needs higher duct pressure during working hours and lower at night, then the OC contact of the SPS2F-2K0 is connected to a timer, and the controller switches setpoints within the 0–2000 Pa range and controls the EC fan with a 0-10 VDC signal. Power the controller at 24 VDC (e.g. from a DRPS8-24-40) and wire it with 4 wires.

Application guide: how it is used in practice

The SPS2F-2K0 adapts to different sites – only what switches the setpoints and what is connected to the output change:

Site	What is connected	Result	Installer's note
Office, school (day / night)	Timer or BMS relay → OC contact; AO1 → EC fan	Higher pressure is maintained during working hours, lower at night	Write the setpoint values via Modbus RTU
Room with a motion sensor	Motion sensor contact → OC	When people are present, a higher setpoint is switched on	OC – dry contact, no external voltage
Constant air volume	PSET-PVC-200 at the fan measuring points, K factor	The fan delivers the set m³/h	K factor – in the fan manufacturer's data
Frequency converter	AO1 0-10 VDC / 0-20 mA → converter analog input	The converter controls the motor based on pressure	Select the signal type with switch SW1
Building with BMS	Modbus RTU → A, /B	Setpoints are switched and changed centrally	Close the NBT jumper at the end of the line

How to choose the range of a pressure controller and power supply

Range / supply	Recommended model
0–2000 Pa, 24 VDC (4-wire)	SPS2F-2K0 (0–2000 Pa, 24 VDC) ← this model
0–6000 Pa, 24 VDC (4-wire)	SPS2F-6K0 (0–6000 Pa, 24 VDC)
0–2000 Pa, 24 VAC / VDC (3-wire)	SPS2G-2K0 (0–2000 Pa, 24 VAC / VDC)
0–6000 Pa, 24 VAC / VDC (3-wire)	SPS2G-6K0 (0–6000 Pa, 24 VAC / VDC)

Rule: choose the range according to the maximum operating pressure – 0–2000 Pa for most systems, 0–6000 Pa for higher-pressure systems. Choose the supply according to the site's power source: type F only 24 VDC, type G 24 VAC or VDC (the twin of this model is SPS2G-2K0).

When to choose another solution: for a single setpoint with a wide choice of ranges – HPSP-2 / DPSP-2 (with display) controllers; for damper actuators – HPSA-2 / DPSA-2; for measurement only – HPS-2 / DPS-2 transmitters; for simple on/off control – PSW pressure switches.

Pros

Two setpoints with contact switching
PI control and autotune
0-10 VDC / 0-20 mA / PWM output
Modbus RTU
IP65, aluminium nozzles

Cons / limitations

No display – setpoint values and PI parameters are changed only via Modbus RTU (Sensistant or 3SModbus)
Accuracy ±3 % – if a single setpoint is sufficient, the more accurate (±2 %) HPSP-2 / DPSP-2 controllers
Operating environment from +10 °C – not suitable for unheated locations
The pressure connection kit is not included – choose PSET-PVC-200 or PSET-QF-200
Only for clean air and non-aggressive, non-flammable gases

Safety and installation notes

Installation and connection are to be carried out by a qualified specialist with the power disconnected.
Power supply – only 18–34 VDC.
Do not power G and F types from the same AC transformer with a common GND – a short circuit is possible.
If AC power is used in the Modbus network, do not connect the GND terminal to other devices or to the CNVT-USB-RS485 converter – the communication electronics or the computer may be damaged.
Ambient temperature +10…+60 °C, < 95 % rH non-condensing.

Quick selection guide

0–2000 Pa

2 setpoints

PI controller

0-10 VDC / 0-20 mA / PWM

Modbus RTU

24 VDC

IP65

Suitable when you need:

to implement day / night or high / low pressure mode;
to maintain a constant pressure or airflow in the 0–2000 Pa range;
to control an EC fan or frequency converter without BMS logic.

Check before use:

whether the operating pressure fits within 0–2000 Pa;
what the setpoints will be switched with (dry contact or Modbus);
the supply type (24 VDC or 24 VAC) and the number of wires;
whether the ambient temperature is not below +10 °C.

Important reminder: The SPS2F-2K0 has no display – the setpoint values and PI parameters are set via Modbus RTU (Sensistant or 3SModbus).

FAQ

How are the setpoints switched?
By a dry contact OC (timer, switch, motion sensor or BMS relay) or via Modbus RTU.

What signal does the output provide?
0-10 VDC, 0-20 mA or PWM (open collector) – selected with switch SW1.

Can air volume be controlled?
Yes, when the fan K-factor is known.

What is the difference between F and G?
F – 24 VDC only, 4 wires; G – 24 VAC or VDC, 3 wires.

Are pressure tubes included in the kit?
No, choose the PSET-PVC-200 or PSET-QF-200.

In what environment can it be installed?
Operating environment +10…+60 °C, < 95 % rH non-condensing, so the controller is not suitable for unheated locations.

Differential pressure controller with 2 setpoints | 0-2000Pa | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VDC | IP65 | Sentera Controls | SPS2F-2K0

Sentera SPS2F-2K0 – differential pressure controller with 2 setpoints, 0–2000 Pa, PI control, 0-10 VDC / 0-20 mA / PWM output, Modbus RTU, 24 VDC, IP65 – for day / night ventilation with EC fans.

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

Differential pressure controller with 2 setpoints | 0-2000Pa | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VDC | IP65 | Sentera Controls | SPS2F-2K0

Differential pressure controller with 2 setpoints | 0-2000Pa | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VDC | IP65 | Sentera Controls | SPS2F-2K0

Operating principle

Technical specifications

Manufacturer documentation

Main functions

Where is it used?

On-demand operation

Practical application

Application guide: how it is used in practice

How to choose the range of a pressure controller and power supply

Pros

Cons / limitations

Safety and installation notes

Quick selection guide

FAQ

Differential pressure controller with 2 setpoints | 0-2000Pa | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VDC | IP65 | Sentera Controls | SPS2F-2K0

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