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SK3235.440 Rittal Speed control for fan-and-filter uni3240/3241/3243/3244.500 3245
Rittal SK3235.440 EC speed control unit for temperature-dependent regulation and monitoring of EC fan-and-filter units.
£118.54
Why Choose the Rittal SK3235.440 EC Speed Control Unit?
The Rittal SK3235.440 is an intelligent EC fan speed control unit designed for temperature-dependent regulation and monitoring of Rittal fan-and-filter units. As part of the Rittal SK climate control accessory range, it helps reduce operating noise and energy consumption by automatically adjusting EC fan speed according to enclosure temperature conditions.
This controller provides automatic activation and monitoring of up to 4 EC fan-and-filter units, allowing efficient airflow management in industrial electrical cabinets. The integrated external NTC temperature sensor measures enclosure temperature, while the alarm relay provides status reporting for faults such as overtemperature, fan failure, cable break or sensor failure.
With a 100–250 V AC supply range, a temperature setting range of 5–55 °C and DIN rail mounting capability, the SK3235.440 provides a flexible control solution for Rittal EC fan systems used in industrial automation and electrical enclosure applications.
Key Advantages
- Temperature-dependent EC fan speed control for efficient enclosure ventilation.
- Reduces fan noise and energy consumption through demand-based operation.
- Supports monitoring of up to 4 EC fan-and-filter units.
- Integrated alarm relay for reliable fault notification.
- 100–250 V AC operation for flexible industrial applications.
- Easy installation on standard 35 mm DIN rail.
Key Features
- Rittal SK EC speed control series.
- Control unit for EC fan-and-filter units.
- Temperature-controlled fan regulation.
- Monitoring capability for up to 4 EC filter fans.
- External NTC temperature sensor included.
- 1.80 m sensor cable length.
- Status LED indication for operating condition.
- Alarm relay for overtemperature, fan defect, cable break and sensor failure.
- Compatible with Rittal fan-and-filter units including 3140.500, 3140.510, 3240.500, 3241.500, 3243.500, 3244.500 and 3245 series models.
Intelligent Control for Industrial Enclosure Ventilation
Efficient enclosure ventilation requires the correct balance between cooling performance, energy consumption and operating noise. The Rittal SK3235.440 EC speed control unit automatically adjusts connected EC fans according to temperature demand, helping maintain optimal enclosure conditions.
By monitoring fan operation and providing alarm feedback, the controller supports predictive maintenance and improves system reliability. It is ideal for industrial control cabinets where efficient thermal management and dependable operation are essential.
Typical Applications
- Industrial control cabinets.
- Automation and machine-building enclosures.
- Electrical distribution panels.
- PLC and control system cabinets.
- Manufacturing equipment ventilation systems.
- Rittal EC fan-and-filter installations.
Technical Specifications
| Manufacturer | Rittal |
|---|---|
| Series | SK Climate Control Accessories |
| Model | SK3235.440 |
| Product type | EC fan speed control unit |
| Application | Fan-and-filter unit control |
| Rated operating voltage | 100–250 V AC |
| Frequency | 50/60 Hz |
| Temperature setting range | 5–55 °C |
| Fan monitoring capacity | Up to 4 EC fan-and-filter units |
| Mounting type | 35 mm support rail EN 50 022 |
| Sensor type | External NTC temperature sensor |
| Sensor cable length | 1.80 m |
| Weight | approx. 0.45 kg |
Frequently Asked Questions
What is the Rittal SK3235.440 used for?
The SK3235.440 is used to control and monitor EC fan-and-filter units in electrical enclosures using temperature-dependent speed regulation.
How many fans can the SK3235.440 control?
The controller can activate and monitor up to 4 EC fan-and-filter units.
What voltage does the SK3235.440 require?
The speed controller operates from a 100–250 V AC supply at 50/60 Hz.
What temperature range can be set?
The controller has an adjustable temperature setting range of 5–55 °C.
How is the SK3235.440 installed?
The unit is designed for mounting on a standard 35 mm DIN rail according to EN 50 022.
Trusted by Industrial Automation Professionals
Rittal SK EC speed controllers provide intelligent fan management solutions that improve enclosure ventilation efficiency, reduce energy usage and support reliable industrial operation.
