Configurable and freely programable powered by Sedona Framewor controller for fan coil units with Modbus or BACnet communication. Equipped with onboard 18 I/Os, adapted to be supplied with 24 V AC voltage and 24 V AC triac control.

Explore Pre-loaded Application for 256 Types of Fan Coil Units
To minimize time and simplify the commissioning process, the FCU controller is delivered with a built-in application, which supports the most popular types of fan coil units. A dedicated DIP switch allows adjusting parameters of the application. Additionally, in the BACnet protocol, the application has a built-in function that allows to automatically bind master and slave controllers in the groups.

Experience the Freedom of Control offered by the Sedona Framework
FCU-LL is a configurable and freely programmable controller with Modbus RTU/ASCII and BACnet MS/TP protocols onboard. The possibility of creating a tailor-made application with the power and flexibility offered by the Sedona Framework makes the controller useful not only for fan coil control. Sedona is an open-source software environment designed to make it easy to build smart, networked, embedded devices, which are well suited for implementing control applications.
Freely programmable controller with a modern programming tool and 18 onboard I/Os is suitable for most types of fan coil units and other comfort management applications.

4 Special Inputs
Take advantage of a special input with support for the most popular types of temperature sensors, ability to read voltage, resistance, current, and dry contact measurements, with a fast pulse counter saving up to 100 pulses per second directly to the EEPROM memory.

4 Digital Inputs
Dry contact inputs – made for monitoring. 100 Hz fast pulse counter with override function saves the real-time values to the non-volatile memory of the controller.

5 Digital Outputs
There are onboard: 3 digital outputs 6 A for fan control, 1 digital output 10 A for electric heater, and 1 digital output 6 A for cooling valve actuator.

3 Analog Outputs
0-10 V DC analog outputs dedicated for a heating actuator, cooling actuator, and fan speed control.

2 Triac Outputs
The FCU-LL controller is equipped with two triac outputs dedicated to heating and cooling thermal valve actuators. Outputs can be connected to actuators with a 24 V AC power supply.
Triac outputs can work as typical binary outputs for binary temperature control or with PWM modulation.

Open Communication
The powerful FCU-LL controller is equipped with two RS485 interfaces with open protocols, BACnet MS/TP and Modbus RTU/ASCII. You can connect up to 128 devices on one bus.

Simplified Configuration and Commissioning Process
You can prepare your application with the use of a free of charge programming tool or configure the FCU-LL controller using our Quick Start-up manual and built-in DIP switches.

Quality and Reliability Confirmed by Certificates
iSMA CONTROLLI is a long-standing member of the BACnet community. The experience in developing high quality products and the BTL (BACnet Test Laboratory) certification confirm the excellent performance of communication using the BACnet protocol.


Technical Specification


Hardware Specification
ARM Cortex-M4 processor
2 RS485 interfaces
mini USB type B interface
Programmable DIP switches
DIP switches for configuration
Status LED indicators
DIN rail mounted
18 I/Os onboard

4 Special Inputs (SI)
Temperature input: 10K3A1, 10K4A1, Carel 10K, 20K6A1, 2.2K3A1, 3K3A1, 30K6A1, SIE1, TAC1, SAT1
Resistive input 0-1000 kΩ
Voltage input 0-10 V DC
Current input 0-20 mA
Dry contact input
Fast pulse counter up to 100 Hz saved in the EEPROM memory

4 Digital Inputs (DI)
Dry contact input
Fast pulse counter up to 100 Hz saved in the EEPROM memory

5 Digital Outputs (DO)
3 digital outputs 6 A NO for fan control
1 digital output 10 A NO for electric heater and
1 digital output 6 A NO for cooling valve actuator

3 Analog Outputs (AO)
0-10 V DC output maximum load up to 20 mA
PWM: 0.01 Hz, 0.1 Hz, 1 Hz, 10 Hz, 100 Hz

2 Triac Outputs (TO)
0.5 A @ 24 V AC for heating and cooling actuators
PWM: 0.01 Hz, 0.1 Hz, 1 Hz, 10 Hz, 100 Hz

Free software iSMA Tool & FCU Updater

Power Supply
24 V AC

Power supply24 V AC
Analog outputs3
Digital outputs5
Digital inputs4
Inputs typeDigital, Special
Outputs typeAnalog, Triac, Digital
Controller typeProgrammable|Configurable
Communication protocolBACnet MS/TP, Modbus RTU/ASCII


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