iSMA-B-LP 2020-03-30T12:34:30+00:00



iSMA-B-LP is a room unit with 2.3” LCD display and four function buttons. Additionally, the room unit has the built-in temperature sensor.


iSMA-B-LP is powered with 24 V AC/DC and has the built-in RS485 port (Modbus RTU/ASCII and BACnet MSTP). Use of open communication protocol allows to connect the room unit with any controller supporting Modbus RTU/ASCII or BACnet MSTP. Together with iSMA-B-FCU controller, the room unit allows to change the basic parameters such as: temperature setpoint, fan speed, FCU mode and others. Thanks to built-in USB port, there is possibility to firmware update and room unit configuration without the necessity of power supply. iSMA-B-LP has the modern design and is available in different colours (white is basic) on client request.

Temperature sensor

  • Type: 10k NTC
  • Range: 0 – 50°C
  • Accuracy: +/- 0,5°C
  • Resolution: +/- 0,1°C


  • 2x RJ 12 terminal (RS485 half duplex)
  • Baud rate: 2400 to 115200 bps
  • Protocol: Modbus, BACnet
  • MINI USB, Type B


  • ARM Cortex – M0+


  • Dimension: 100x123x27 mm
  • Construction: plastic, self-extinguishing (PC/ABS)
  • Wall mounting (standard electric box)
  • Cooling: internal air circulation


  • Operating temperature: 0°C to 50°C
  • Storage temperature: -40°C to 85°C
  • Relative humidity: 5% to 95%, no condensation
  • Ingress Protection Rating: IP20
  • For indoor installation

Power supply

  • 24 V AC/DC
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Holler Box