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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.


I-7061 CR - 12-channel Power Relay Output Module with DCON Protocol I-7061 CR - 12-channel Power Relay Output Module with DCON Protocol
Warranty 12 months 2-3 weeks
Brand: ICPDAS Model: I-7061 CR
12-channel Power Relay Output Module with DCON Protocol. The 7061 series provides 12 power relay output channels and the 7067 series provides 7 signal relay output channels. There are options for configuring power-on and safe values. 4 kV ESD protection and 3750 VDC int..
205.00 €
SDM-8AI - Industrial expansion module, 8 universal analog inputs to Modbus RTU, with RS485 interface SDM-8AI - Industrial expansion module, 8 universal analog inputs to Modbus RTU, with RS485 interface
2-3 days
Brand: Aspar Model: SDM-8AI
Industrial expansion module, 8 universal analog inputs to Modbus RTU, with RS485 interface.Features:INPUT: 8 universal analog inputsOUTPUT: RS485 - Modbus Slave (ASCII, RTU)Operation of voltage inputs +10V, +-10VSupports current inputs +-20mA, 0-20mA, 4-20mAEach channel..
205.00 €
SDM-8AO - Industrial expansion module, 8 analog universal outputs on Modbus RTU, with RS485 interface SDM-8AO - Industrial expansion module, 8 analog universal outputs on Modbus RTU, with RS485 interface
2-3 days
Brand: Aspar Model: SDM-8AO
Industrial expansion module, 8 analog universal outputs on Modbus RTU, with RS485 interface. Features:OUTPUT: 8 universal analog outputsINPUT: RS485 - Modbus Slave (ASCII, RTU)Up to 128 modules on RS485 networkVoltage outputs support: 0 - 10VCurrent outputs support: 0-2..
205.00 €
ET-2261 CR - Ethernet I/O Module with 2-port Ethernet Switch and 10 Power Relay Outputs ET-2261 CR - Ethernet I/O Module with 2-port Ethernet Switch and 10 Power Relay Outputs
Warranty 12 months 2-3 weeks
Brand: ICPDAS Model: ET-2261 CR
Ethernet I/O Module with 2-port Ethernet Switch and 10 Power Relay Outputs. Providing various digital I/O functions, the ET-2261 module is an IP-based Ethernet I/O monitoring and control module. The module can be remotely controlled through a 10/100 M Ethernet network b..
207.00 €
ET-7066 CR - Ethernet I/O Module with 1 Ethernet Port and 8-ch PhotoMOS Relay ET-7066 CR - Ethernet I/O Module with 1 Ethernet Port and 8-ch PhotoMOS Relay
Warranty 12 months 2-3 weeks
Brand: ICPDAS Model: ET-7066 CR
Ethernet I/O Module with 1 Ethernet Port and 8-ch PhotoMOS Relay. The ET-7066/PET-7066 provides 8 form A PhotoMOS relays. It features optical isolation for 3000 Vrms of transient overvoltage protection and doesn’t have channel-to-channel isolation. The power-on value an..
207.00 €
PET-7042 CR - Ethernet PoE I/O Module with 1 Ethernet PoE Port and 16 Digital Outputs PET-7042 CR - Ethernet PoE I/O Module with 1 Ethernet PoE Port and 16 Digital Outputs
Warranty 12 months 2-3 weeks
Brand: ICPDAS Model: PET-7042 CR
Ethernet PoE I/O Module with 1 Ethernet PoE Port and 16 Digital Outputs. The ET-7042/PET-7042/ET-7242/PET-7242 provides 16 sink-type digital output channels. It features optical isolation for 3750 VDC of transient overvoltage protection and doesn’t have channel-to-chann..
207.00 €
PET-7044 CR - Ethernet PoE I/O Module with 1 Ethernet PoE Port, 8 Digital Inputs and 8 Digital Outputs PET-7044 CR - Ethernet PoE I/O Module with 1 Ethernet PoE Port, 8 Digital Inputs and 8 Digital Outputs
Warranty 12 months 2-3 weeks
Brand: ICPDAS Model: PET-7044 CR
Ethernet PoE I/O Module with 1 Ethernet PoE Port, 8 Digital Inputs and 8 Digital Outputs. The ET-7044/PET-7044/ET-7244/PET-7244 provides 8 wet contact digital input channels and 8 sink-type digital output channels. It features optical isolation for 3750 Vrms of transien..
207.00 €
PET-7050 CR - Ethernet PoE I/O Module with 1 Ethernet PoE Port, 12-channel Digital Input, 6-channel Digital Output
Warranty 12 months 2-3 weeks
Brand: ICPDAS Model: PET-7050 CR
Ethernet PoE I/O Module with 1 Ethernet PoE Port, 12-channel Digital Input, 6-channel Digital Output. The ET-7000/ET-7200 series provides full networking capabilities, and a variety of I/O functions, together with web based Ethernet I/O monitoring and control modules, m..
207.00 €
PET-7051 CR - Ethernet PoE I/O Module with 1 Ethernet PoE Port and 16 Digital Inputs PET-7051 CR - Ethernet PoE I/O Module with 1 Ethernet PoE Port and 16 Digital Inputs
Warranty 12 months 2-3 weeks
Brand: ICPDAS Model: PET-7051 CR
Ethernet PoE I/O Module with 1 Ethernet PoE Port and 16 Digital Inputs. The ET-7051/PET-7051/ET-7251/PET-7251 provides 16 wet contact digital input channels. Each input channel can be used as a 32-bit counter. It features optical isolation for 3750 Vrms of transient ove..
207.00 €
PET-7052 CR - Ethernet PoE I/O Module with 1 Ethernet PoE Port, 8 Digital Inputs and 8 Digital Outputs
Warranty 12 months 2-3 weeks
Brand: ICPDAS Model: PET-7052 CR
Ethernet PoE I/O Module with 1 Ethernet PoE Port, 8 Digital Inputs and 8 Digital Outputs. The ET-7052/PET-7052/ET-7252/PET-7252 provides 8 wet contact digital input channels and 8 source-type digital output channels. It features optical isolation for 2500 VDC of transie..
207.00 €
PET-7060 CR - Ethernet PoE I/O Module with 1 Ethernet PoE Port, 6 Relay Outputs and 6 Digital Inputs PET-7060 CR - Ethernet PoE I/O Module with 1 Ethernet PoE Port, 6 Relay Outputs and 6 Digital Inputs
Warranty 12 months 2-3 weeks
Brand: ICPDAS Model: PET-7060 CR
Ethernet PoE I/O Module with 1 Ethernet PoE Port, 6 Relay Outputs and 6 Digital Inputs. The ET-7060/PET-7060/ET-7260/PET-7260 provides 6 wet contact digital input channels and 6 form A electromechanical relays. It features optical isolation for 3000 VDC of transient ove..
207.00 €
BMT-DI4 - I/O BACnet MS/TP Module with 4 digital inputs
3 years warranty 5-10 days
Brand: Contemporary Controls Model: BMT-DI4
I/O BACnet MS/TP Module with 4 digital inputs.For those installations that support a fieldbus solution such as BACnet MS/TP, Contemporary Controls provides solutions for expanding the number of I/O points in the field. These compact cost-effective modules are available ..
209.00 €
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