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Description
iSMA-B-AAC20-LCD-MAbout the product iSMA B AAC20 LCD M controller (iSMA B AAC20)with inbuilt display and M Bus for up to 20 devicesis an advanced device to control building automation and HVAC systems. Use of SVM (Sedona Virtual Machine) allows you to finish the setup quickly and easily. It is ideal for smaller projects where you want to stay open protocol while keeping the development simple and the cost under budget. Big, fully programmable LCD can be used as simple
About the product
iSMA-B-AAC20-LCD-M controller (iSMA-B-AAC20) with inbuilt display and M-Bus for up to 20 devices is an advanced device to control building automation and HVAC systems. Use of SVM (Sedona Virtual Machine) allows you to finish the setup quickly and easily. It is ideal for smaller projects where you want to stay open protocol while keeping the development simple and the cost under budget.
Big, fully programmable LCD can be used as simple user interface to allows local operation of system. The Mbus Interface allows you to pick up max 20 meters.
With the large number of inputs and outputs allows to integrate with other devices and sensors (AAC20 provides 8xUI, 4xDI, 4/6xAO and 4xDO). Its fast processor allows to control of even very large objects. Built-in RS485 can be used to expand number of I/O by connecting MINI or MIX series I/O modules using Modbus ASCII/RTU. In addition, to increase the versatility of the controller, it supports many open communications protocols like: BACnet, Modbus, SOX, DALI, M-Bus, 1-wire or oBIX (optional). AAC20 is mounted in a housing adapted for DIN rail mounting or directly on a panel. Separate, easy to remove connectors allow quick wiring without removing the entire module.
Inputs & Outputs8xUniversal Inputs (8UI)
All universal inputs have 16-bit resolution which support the following types of inputs:
- Temperature input support the following types of sensors: 10K3A1, 10K4A1, Carel 10K, 20K6A1, 2.2K3A1, 3K3A1, 30K6A1, SIE1, TAC1, SAT1, Pt1000, Ni1000
- Voltage input 0-10VDC: input resistance 100kΩ accuracy ±0,1% measurement resolution 3mV@12bit and 1mV@16bit
- Current input 0-20mA (external resistor 499Ω required)
- Resistive input 0-1000kΩ: measurement resolution for 20kΩ load 20Ω@12bit and 1Ω@16bit
- Dry contact input
- Dry contact inputs
- Fast pulse counter up to 100Hz
All analog outputs are equipped with 12-bit ADC provides10 mV resolution and accuracy less than ±0,5%. They support the following output types:
- Output 0-10V DC maximum load up to 20mA(5mA- AO6)
- PWM: 0,01Hz, 0,1Hz, 1Hz, 10Hz, 100Hz
4 x Digital Outputs (4DO)
- Relay output (NO) max. 3A, 250 VAC/30 VDC
- ARM Cortex-M4 204MHz
- ARM Cortex-M0 204MHz
- Interface RS485 half duplex
- Baud rate: 2400 to 115200 bps
- 2xEthernet with built in switch
- 1-Wire Interface
- Micro SD card slot
- USB Host Interface
- Protocols: Modbus, BACnet, 1-wire, oBIX
- 24V AC/DC
- Dimension: 106x110x62 mm.
- Construction: plastic, self-extinguishing (PC/ABS)
- DIN rail mounting (DIN EN 50022 norm)
- Cooling: internal air circulation
- Operating temperature: -10°C to 50°C
- Storage temperature: -40°C to 85°C
- Relative humidity: 5 to 95%, no condensation
- Ingress Protection Rating: IP40 – for indoor installation
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 5
LIFE CHANGING PRODUCT!!
Color: White, Size: 36 inches, Color: White, Size: 36 inches
I absolutely LOVE this tower fan!! I bought the 36 inch & I don’t know how I ever lived without this now! I’ve become so spoiled now by having a wide distributed airflow on me and would like one in every room. This fixed my sleep problems as a woman going through perimenopause, I no longer wake up hot. I LOVE the little remote right on my nightstand and all the many features it offers including different levels (I’ve only needed it up to level 3 so far) and auto shut off. Unlike a traditional fan the air blow is distributed over a wider area so it hits not just my face but the entire bedroom has air movement if desired. And wonderful because it’s silent and you don’t even know it’s on. This has to be my favorite product ever purchased on Amazon! No complaints, this is HEAVEN SENT! My only regret is not purchasing it sooner.
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Reviewed in the United States on May 31, 2026
★★★★★ 5
Excellent fan, moves a lot of air a long distance, and is very quiet
Color: White, Size: 42 inches
We have the other type of Levoit standing fan which is super quiet and moves air nicely inside a room. But we have one side of the house that gets little air flow in general, so we bought this to try and improve the air flow around the house by directing air from one side to the other. We have been using a Vornado fan for this in the past, but the air flow it produces dissipates too quickly and the damn thing sounds like a small jet engine.
So as we had such a great experience with the other Levoit fan we tried this one. It is very expensive, and there are cheaper ones available, however we felt that longer distance airflow and quiet were very important to us.
We are not disappointed. This fan is really quiet, on lower settings it is whisper quiet, perfect for moving air and still being able to work, or be in a video call. On the highest setting it does make some noise, air moving quickly produces turbulence, there is no way to avoid it. But the noise level is low, and not very noticeable. However it moves huge amounts of air, an directs it very tightly. It does not dissipate even after 30-40ft. Great for moving air around a house.
On the down side, it only has 5 speeds, and it only rotates 90 degrees. The other Levoit fan has more options to control the air flow. It displays the temperature but only when changing the settings. It would be nice to have a button on the remote to display temp, even if just briefly. The auto program has no hysteresis when changing fan speeds, so when the temp hits a point where it is going to change, it keeps speeding up and slowing down every second or two. With that the noise becomes noticeable for a while. A 20 second or so hysteresis delay would solve that issue.
On the major up side, it is as quiet as advertised, it blows huge amounts of air, even on the lowest setting it moves enough air to slowly flap paper 50ft away, and you cannot hear it. The remote is good, and there is a little nook to store it in. You can have it set to not display anything, so it stays dark at night, the timer works well, although we find we don't use it. It is very easy to open and clean.
In short, even though it cost a premium price it ended up being worth it, and now is in use 24/7. Would definitely by again if we needed another one.
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Reviewed in the United States on September 24, 2025
★★★★★ 5
“Excellent purchase for summer ☀️❄️”
Color: White, Size: 36 inches, Color: White, Size: 36 inches
I bought this 36-inch Levoit tower fan and it far exceeded my expectations. I love that it has a quiet mode, especially the night mode, because it allows me to sleep peacefully without disturbing noises. It cools the room very well, and the airflow is constant and pleasant. I also like that it has several speeds and modes, which allows me to adjust it according to the day's temperature.
What I liked most was the design. I love it! It's a super modern tower fan that doesn't take up much space, so it looks good in any corner of the house. The remote control makes it even more practical, since I can use it without getting up.
In short, it's an efficient and practical fan, perfect for everyday use. I definitely recommend it if you're looking for a quiet yet powerful fan.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Best fan I have ever used.
Color: White, Size: 42 inches Wifi
Easy assembly, simple WiFi and Alexa connection. Extremely quiet operation. Fan speeds and oscillating feature are perfect.
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Reviewed in the United States on May 15, 2026
★★★★★ 5
It has many conveniences
Color: White, Size: 42 inches, Color: White, Size: 42 inches
I like that it detects temperature and determines what fan speed it should be on to control temperature in the room. Its made a notable difference in my warmest room of the house this summer. Its nice and quiet. You can also adjust the blades up or down if you want to redirect the air flow much like in a vehicle. I got the taller fan for the bigger living space i have and it’s comfortable. I feel the air right away. It’s bot like a pedestal fan. This is much more giving to the entire body rather than just the face. It’s also not as intrusive as a pedestal fan. It fits in smaller spaces. It doesn’t block the view like a pedestal fan
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Reviewed in the United States on July 22, 2025
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