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Description
iSMA-B-4U4O-HAbout the product The module is factory equipped with the two most popular open communication protocols: ModbusASCII RTU andBACnetMSTP, which are selected using DIP switches. Addressing the modules is via rotary switches, which facilitates and accelerates the process of commissioning the system. Built in mini USB allows for initial configuration of the unit without power supply. BMS Compatibility System Controller Tridium Jace3, Jace6,
About the product
The module is factory-equipped with the two most popular open communication protocols: Modbus ASCII/RTU andBACnet MSTP, which are selected using DIP switches.
Addressing the modules is via rotary switches, which facilitates and accelerates the process of commissioning the system.
Built-in mini USB allows for initial configuration of the unit without power supply.
BMS Compatibility 
 
4x Universal Inputs (4UI)
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 For sensor Pt1000 and Ni1000 use only 16bit resolution
- Voltage input 0-10VDC: input resistance 100kΩ accuracy ±0,1% measurement resolution 3mV@12bit and 1mV@16bit
- Current input 0-20mA - Required external resistor: 200 Ω, sold separately
- Resistive input 0-1000kΩ: measurement resolution for 20kΩ load 20Ω@12bit and 1Ω@16bit
- Dry contact input
4x Digital Outputs (4DO)
- Relay output (NO) max. 3A, 250V AC/30 VDC
Platform
- Cortex-M3
Communication
- Interface RS485 half duplex
- Up to 99 devices on the bus
- Protocols: MODBUS or BACnet
- Baud rate: 2400 to 115200 bps
Power supply
- 24V AC/DC
Housing
- Dimension: 35x110x62 mm.
- Construction: plastic, self-extinguishing (PC/ABS)
- DIN rail mounting (DIN EN 50022 norm)
- Cooling: internal air circulation
Environments
- 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 
 Do you have a question about this product?
 
In the DOWNLOAD session you can find:
- The ISMA driver for Niagara, which contains the ISMA device Palette
- Isma configurator which is needed for updating firmware and configure modules
- Templates for Siemens sensors for Niagara (Generic Tabular) - Ni1000 Ohm at 0°C - PTC T1 (Resistance/Voltage) - Pt100 Ohm at 0°C - Pt1000 Ohm at 0°C - Pt1000 Ohm at 0°C - Pt1000 Ohm at 0°C - Pt1000 Ohm at 0°C - Pt1000 Ohm at 0°C  -    Ni100 Ohm at 0°C - Ni100 Ohm at 20°C - NTC 107 Ohm at 20°C - NTC 150 Ohm at 31°C - NTC 1 kOhm at 20°C - NTC 1 kOhm at 20°C - NTC 2 kOhm at 20°C - NTC 3850 Ohm at 0°C - NTC 500 Ohm at 20°C - NTC 575 Ohm at 20°C - NTC 8250 Ohm at 19°C
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
4.1 ★★★★★
Based on 11 reviews
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Product Reviews
★★★★★ 5
Muy práctico 👌
Color: Rucstic Brown, Size: 2+1 Tier Size, Color: Rucstic Brown, Size: 2+1 Tier Size
Muy práctico y fácil de armar e instalar.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
★★★★★ 5
love!
Color: Black, Size: 2+1 Tier Size, Color: Black, Size: 2+1 Tier Size
these floating shelves are sooo cute and i love them so much. it took a HOT minute to put them together (prob like 30-45 mins for me), but i can’t explain how happy i am to have them! i hung these once in my last apartment and re-hung again after moving, and they’re still great.
the only con is that the rail around the bottom shelf (the part “holding” the L block, plant, and white block in) is a little bent and i can’t straighten it out no matter what i do. it’s really hard to tell, but it’s not quite level with the board beneath it (pic 2). i’m just a perfectionist so it was very clear to me when putting it together haha. nobody else notices it until i point it out, and i’ve begun to overlook it too, but just a little something that i wanted to add.
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Reviewed in the United States on August 30, 2023
★★★★★ 5
Cute and functional
Color: Brown, Color: Brown
I wanted something to spruce up a corner in my kitchen and these did the trick. They were easy to install and look great. I use mine for small items and they hold up no problem!
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Reviewed in the United States on December 25, 2025
★★★★★ 5
Shelf
Color: Brown, Color: Brown
Easy to install, clear instructions on how to install. Great quality. Goes well in my space.
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Reviewed in the United States on April 15, 2026
★★★★★ 5
They look good and seem well built.
Color: Brown
These are very well made and look really good. They ended up being too small for my need, but that was my fault on measurements. I would highly recommend if you are looking for corner shelves.
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Reviewed in the United States on March 9, 2026