iSMA-B-LP Modbus User Manual

Introduction

The iSMA-B-LP is a wall panel with 2.3” LCD display and four function buttons. Additionally, the panel has a built-in temperature sensor and, optionally, humidity and CO₂ sensors.

The iSMA-B-LP is powered with 24 V AC/DC and has a built-in RS485 port (Modbus RTU/ASCII and BACnet MS/TP). The use of open communication protocol allows to connect the panel with any controller, which supports Modbus RTU/ASCII or BACnet MS/TP. Connected to the iSMA controllers, the panel allows to change the basic parameters such as: temperature setpoint, fan speed, FCU mode, and other. Thanks to a built-in USB port, there is a possibility of updating firmware and configurating the panel without the need of power supply. The iSMA-B-LP has modern design and is available in different colors (white is basic), on client’s request.

This user manual outlines Modbus registers available in the iSMA-B-LP room panel and describes their configuration.

LP panels

Revision History

Rev.	Date	Description
1.0	28 Aug 2016	First edition
1.1	21 Feb 2017	New function: Added SubmenuIconDisplayOFF bit in DeviceConfiguration register to disable displaying of Submenu Icons; Changes in Document: Added SubmenuIconDisplayOFF bit description in DeviceConfiguration section Added description of Submenu Boolean All present Value registers
1.2	6 Jun 2017	Added information about BACnet MS/TP protocol
1.3	16 Nov 2017	Added new version of the Panel (iSMA-B-LP(-XX)-1)
1.4	25 May 2022	Rebranded

Revision history

This user manual outlines Modbus registers available in the iSMA-B-LP room panel and describes their configuration.