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Building Management System BMS - building automation

Building Management System BMS – Comprehensive Solutions for Automation and Integration

A Building Management System (BMS) is a centralized platform that enables intelligent monitoring and control of building infrastructure, such as HVAC, lighting, access, and energy. To ensure smooth data exchange and automation across different technologies, a BMS requires specialized converters, communication modules, and industrial networking equipment. At CONSTEEL, we offer a full range of industrial-grade solutions to support efficient, reliable, and scalable BMS deployments.

M-Bus Converters – Integrating Energy and Water Meters

M-Bus to Modbus converters enable BMS platforms to retrieve real-time readings from thermal, electric, gas, and water meters. They are essential for accurate energy monitoring, cost allocation, and integration with building analytics systems.

DALI Converters – Smart Lighting Management

DALI converters support the integration of lighting systems into the BMS architecture. They offer advanced control over individual luminaires, groups, and scenes. These devices help reduce energy costs and enhance occupant comfort through automation.

BACnet, Modbus, KNX Converters – Multi-Protocol Communication

Our protocol converters bridge communication between BACnet IP, Modbus RTU/TCP, and KNX systems. They are key components for linking HVAC units, lighting controls, fire systems, and access control into a unified BMS dashboard.

AC Communication Modules – BMS Control for Air Conditioning

Specialized communication modules allow direct integration of split units and VRF/VRV air conditioners (Daikin, LG, Mitsubishi, etc.) into BMS networks. These devices enable centralized temperature, mode, and schedule control across all zones.

I/O Modules – Digital and Analog Signal Handling

Input/output modules expand the control capabilities of your BMS. They collect signals from sensors and switches, and control actuators, fans, relays, or dampers. Ideal for HVAC, alarm, shading, and access control systems.

Industrial Switches – Reliable Ethernet Networks

Our industrial-grade Ethernet switches are designed for high-performance BMS networks. They feature wide temperature ranges, redundant power supply, VLAN, QoS, and ring redundancy support – ensuring network stability in harsh environments.

Serial Device Servers – Integration of RS232/RS485 Devices

Serial servers allow legacy devices with RS232 or RS485 interfaces to communicate over IP-based BMS platforms. Perfect for extending the life and connectivity of meters, controllers, and older field devices.

Fiber Media Converters – Long-Distance Communication

Fiber media converters provide reliable data transmission over long distances and ensure electromagnetic interference resistance. Crucial in large buildings, campuses, and industrial areas where wired Ethernet cannot reach.

Frequently Asked Questions (FAQ)

What is a Building Management System?
A BMS is an integrated platform that enables the automated control and monitoring of building systems, such as HVAC, lighting, and power distribution, improving comfort, energy efficiency, and operational safety.

Why are protocol converters necessary in BMS?
They ensure compatibility between devices using different communication standards. This enables centralized control and expands integration across building technologies from various manufacturers.

Which devices can be integrated into a BMS?
HVAC units, lighting systems, power meters, access control, fire alarms, and other building subsystems – using converters, I/O modules, and network equipment.

Is BMS suitable for industrial environments?
Yes – with our robust industrial solutions such as Ethernet switches and serial servers, BMS platforms can operate reliably even in harsh industrial conditions.

Explore our full product offering to build a powerful and future-proof Building Management System. Our team is ready to assist you with technical support and custom-tailored solutions.


LC-101DIN CR - 1-channel AC Digital Input and 1-channel Relay Output Lighting Control Module with DIN rail mount LC-101DIN CR - 1-channel AC Digital Input and 1-channel Relay Output Lighting Control Module with DIN rail mount
Warranty 12 months 2-3 weeks
Brand: ICPDAS Model: LC-101DIN CR
1-channel AC Digital Input and 1-channel Relay Output Lighting Control Module with DIN rail mount. The LC-101 is an easy-to-use lighting control module that requires no specialist skills to install and operate, and no software is needed in order to control the DO channe..
352,50 zł
CAN232 - CAN232 is used for data exchange between CAN-bus field bus and RS-232 bus interface converter, and supports Modbus RTU protocol CAN232 - CAN232 is used for data exchange between CAN-bus field bus and RS-232 bus interface converter, and supports Modbus RTU protocol
6 years warranty 5-10 days
Brand: 3onedata Model: CAN232
CAN232 is used for data exchange between CAN-bus field bus and RS-232 bus interface converter, and supports Modbus RTU protocol. CAN232 interface converter integrated a RS-232 channel and a CAN bus channel can be easily embedded using RS-232 interface for communication ..
385,40 zł
MOD-2I2O - Industrial expansion module, 2 digital inputs and 2 digital outputs on Modbus RTU, with RS485 interface MOD-2I2O - Industrial expansion module, 2 digital inputs and 2 digital outputs on Modbus RTU, with RS485 interface
2-3 days
Brand: Aspar Model: MOD-2I2O
Industrial expansion module, 2 digital inputs and 2 digital outputs on Modbus RTU, with RS485 interface. Features:INPUT/OUTPUT: 2 digital inputs/2 digital outputsOUTPUT/INPUT: RS485 - Modbus Slave (ASCII, RTU)Mount: DIN rail2 configurable 32-bit countersCounter modes: p..
385,40 zł
MOD-4DI - Industrial expansion module, 4 digital inputs on Modbus RTU, with RS485 interface MOD-4DI - Industrial expansion module, 4 digital inputs on Modbus RTU, with RS485 interface
2-3 days
Brand: Aspar Model: MOD-4DI
Industrial expansion module, 4 digital inputs on Modbus RTU, with RS485 interface. Features:INPUT: 4 digital inputsOUTPUT: Interface: RS485 - Modbus (ASCII, RTU)Mount: DIN rail4 configurable 32-bit countersCounter modes: impulse counter; timer; encoderInputs of PNP or N..
385,40 zł
MOD-4DO - Industrial expansion module, 4 digital outputs on Modbus RTU, with RS485 interface MOD-4DO - Industrial expansion module, 4 digital outputs on Modbus RTU, with RS485 interface
2-3 days
Brand: Aspar Model: MOD-4DO
Industrial expansion module, 4 digital outputs on Modbus RTU, with RS485 interface. Features:OUTPUT: 4 digital outputsINPUT: RS485 - Modbus Slave (ASCII, RTU)Mount: DIN railOutputs type PNP, 250mAWatchdog functionComfortable connectors for cables (up to 2.5 mm2)Configur..
385,40 zł
CAN485 - CAN485 is used for data exchange between CAN-bus field bus and RS-485 bus interface converter, and supports Modbus RTU protocol CAN485 - CAN485 is used for data exchange between CAN-bus field bus and RS-485 bus interface converter, and supports Modbus RTU protocol
Shipping 24h Test for Free! 6 years warranty
Brand: 3onedata Model: CAN485
CAN485 is used for data exchange between CAN-bus field bus and RS-485 bus interface converter, and supports Modbus RTU protocol. CAN485 interface converter integrated a RS-485 channel and a CAN bus channel can be easily embedded using RS-485 interface for communication ..
404,20 zł
MOD-1AI - Industrial expansion module with 1 input for current measurement and 1 input for voltage measurement on Modbus RTU, with RS485 interface MOD-1AI - Industrial expansion module with 1 input for current measurement and 1 input for voltage measurement on Modbus RTU, with RS485 interface
2-3 days
Brand: Aspar Model: MOD-1AI
Industrial expansion module with 1 input for current measurement and 1 input for voltage measurement on Modbus RTU, with RS485 interface. Features:INPUT: 1 input for current measurement, 1 input for voltage measurementOUTPUT: Interface: RS485 - Modbus (ASCII, RTU)Operat..
423,00 zł
MOD-1AO - Industrial expansion module, 1 current output 0 ~ 20mA or 4 ~ 20mA, 1 voltage output 0 ~ 10VDC on Modbus RTU, with RS485 interface MOD-1AO - Industrial expansion module, 1 current output 0 ~ 20mA or 4 ~ 20mA, 1 voltage output 0 ~ 10VDC on Modbus RTU, with RS485 interface
2-3 days
Brand: Aspar Model: MOD-1AO
Industrial expansion module, 1 current output 0 ~ 20mA or 4 ~ 20mA, 1 voltage output 0 ~ 10VDC on Modbus RTU, with RS485 interface. Features:OUTPUT: 1 current output 0 ~ 20mA or 4 ~ 20mA, 1 voltage output 0 ~ 10VDCINPUT: Interface: RS485 - Modbus (ASCII, RTU)2 PNP or NP..
423,00 zł
MOD-1TE - Industrial expansion module, 1 universal temperature input for Modbus RTU, with RS485 interface MOD-1TE - Industrial expansion module, 1 universal temperature input for Modbus RTU, with RS485 interface
2-3 days
Brand: Aspar Model: MOD-1TE
Industrial expansion module, 1 universal temperature input for Modbus RTU, with RS485 interface. Features:INPUT: 1 temperature input, universalOUTPUT: Interface: RS485 - Modbus (ASCII, RTU)Support for thermoresistive sensors PT100, PT500, PT1000, NI100, KTY81-110 (2 or ..
423,00 zł
MOD-4DI-M - Industrial expansion module, 4 digital inputs with FRAM memory to Modbus RTU, with RS485 interface
2-3 days
Brand: Aspar Model: MOD-4DI-M
Industrial expansion module, 4 digital inputs with FRAM memory to Modbus RTU, with RS485 interface. Features:INPUT: 4 digital inputs with memoryOUTPUT: RS485 - Modbus Slave (ASCII, RTU)Mounting on a DIN rail4 configurable 32-bit countersFRAM - non-volatile random-access..
446,50 zł
4-port industrial RS-485 HUB with 2000V optoisolation - SW4485I 4-port industrial RS-485 HUB with 2000V optoisolation - SW4485I
Shipping 24h Test for Free! 6 years warranty
Brand: 3onedata Model: SW4485I
4-port RS485 HUB with 2000V optoisolation for RS-485 system in complicated electromagnetic environment. It supports a transmission rate up to 115.2KBPS, and adopts two-way transparent transmission, which allows one RS-485 bus or one RS-232 bus to be divided into 4 RS-48..
450,07 zł
tM-P3R3 CR - 3-channel Isolated Digital Input and 3-channel Relay Output Module tM-P3R3 CR - 3-channel Isolated Digital Input and 3-channel Relay Output Module
Warranty 12 months 2-3 weeks
Brand: ICPDAS Model: tM-P3R3 CR
3-channel Isolated Digital Input and 3-channel Relay Output Module.The tM-P3R3 provides 3 channels for digital input and 3 channels for relay output, each of which features photocouple isolation. All output channels are form A type relays, while input is based on sink- ..
455,90 zł
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