iSMA-B-FCU-LL

The iSMA FCU-LL, a fully programmable controller, is built to control the FCU (Fan Coil Unit)

Configurable and freely programmable, powered by the Sedona Framework 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.

Product Description

To minimise time and simplify the commissioning process, the controller is delivered with a universal application that supports the most popular FCU types. A dedicated DIP switch allows adjustment of the application’s parameters. Additionally, in the BACnet protocol, the application has a built-in function that automatically binds Master and Slave controllers into groups. If the application does not meet the project requirements, it can be modified or created from scratch. The application can be changed in real time via the USB port. There are three hardware versions, which have different types of Triac Outputs and a power supply.

Inputs

• 4x Special Input – voltage, resistance, dry contact
• 4x Digital Input – dry contact

Outputs

• 3x Digital Output 6 A (Fan Speed)
• 1x Digital Output 10 A (electric heater)
• 1x Digital Output 6 A (cooling actuator)
• 2x Triac 0,5 A @ 230 V AC or 0,5 A/0,3 A @ 24 V AC (heating and cooling, actuators)
• 3x Analogue Outputs 0-10 V DC (heating, cooling actuators and Fan Speed)

Platform

• ARM Cortex-M4

Power supply

• 230 V AC

Communication

• Interface RS-485 half duplex
• Up to 128 devices on the bus
• Protocols: Modbus or BACnet
• Baud rate: 4800 to 115200 bps

Housing

• Dimension: 123,6×136,6×54,5 mm, (123,6×171,2×54,9 mm) with plastic cover for terminals
• Construction: plastic, self-extinguishing (PC/ABS)
• DIN rail mounting DIN (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