Four‑protocol building automation controller: BACnet/IP for BMS, MQTT for cloud, OPC UA for IT, and Modbus TCP for legacy. Converts Modbus RTU/TCP data to all four protocols simultaneously. Expandable with 1-3 Y Series I/O boards. Local logic for standalone operation. Dual Ethernet with switch. -40°C to +85°C.
⚡ Multi‑Protocol EdgeIO Controller for Smart Buildings & HVAC
BA190Pro EdgeIO Controller
One device natively supports BACnet/IP, Modbus TCP, OPC UA, and MQTT. Replace “dedicated DDC + multi‑protocol gateway + cloud gateway” with a single controller for building automation, cloud integration, and IT/OT convergence.
Unified Edge Controller for BAS, Cloud, and IT Systems
The BA190Pro is a multi‑protocol EdgeIO controller from BLIIOT, designed for smart buildings and HVAC systems. Building on the BACnet/IP foundation of BA190, it natively integrates Modbus TCP, OPC UA, and MQTT as uplink protocols – delivering a single solution for building automation, cloud platform monitoring, and OT/IT data fusion.
Supporting 1–3 Y‑series expansion slots, it freely combines digital, analog, temperature, serial, and pulse modules to cover HVAC, lighting, security, plumbing, and more. One BA190Pro:
Collects field meters (power, water, heat) via Modbus RTU
Integrates with BAS (e.g., Honeywell, Siemens) via BACnet/IP
Uploads data to cloud platforms (Alibaba Cloud, AWS IoT, etc.) via MQTT
Exposes data to MES, ERP, energy management via OPC UA
Electrical isolation, EMC/EMI tested, -45°C~80°C validated, hardware watchdog, and compliance with BACnet, Modbus, OPC UA, MQTT – a highly reliable, easy‑to‑deploy, scalable edge solution for smart buildings.
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Model: BA190Pro
Multi‑Protocol EdgeIO Controller
✔ 4 native uplink protocols
✔ 1–3 expansion slots
✔ Isolated RS485 + dual Ethernet
Why BA190Pro – Multi‑Protocol Fusion?
Building HVAC systems often face a complex mix of protocols: BAS requires BACnet/IP, energy meters speak Modbus RTU, central monitoring needs MQTT to cloud, and IT analytics expects OPC UA. Traditional solutions deploy multiple gateways – high cost, many failure points.
Traditional Pain Points
BA190Pro Solution
Separate gateways for BACnet, Modbus, MQTT, OPC UA
Single device natively supports all four protocols
Data forwarded across gateways – latency, low reliability
Field data converted directly to any protocol, real‑time sync
Cloud cannot directly retrieve building data – custom development needed
MQTT straight to cloud, collect & upload instantly
IT department cannot access OT data
OPC UA provides standardized, secure interface to upper‑level applications
🔄 Data from Modbus RTU can be simultaneously mapped to BACnet objects, OPC UA nodes, and MQTT messages – one source, every destination.
Key Features
📡 4 Uplink ProtocolsBACnet/IP (BAS), Modbus TCP (PLC/SCADA), OPC UA (IT/OT), MQTT (cloud), plus Modbus RTU master/slave
📟 Modbus RTU Master1x isolated RS485, up to 25 commands – reads power meters, water meters, heat meters, etc.
Custom namespace, node ID mapping to Modbus addresses; security modes: Sign, Sign&Encrypt
MQTT Details
Pub/Sub, QoS 0/1/2, TLS encryption, offline buffering & data packing
Operating Environment
-40°C ~ +85°C, 5%~95% RH
Mounting / Protection
Wall mount / DIN35 rail, IP30
Dimensions (1-slot/3-slot)
30×83×110 mm / 40×83×110 mm
Use Case: Commercial Complex – HVAC Cloud‑Edge Collaboration
Background: A 120,000 m² commercial complex with 30 AHUs, 50 FCUs, 8 chillers, 15 power meters, and 6 heat meters. The original system used multiple standalone DDC controllers and a Honeywell BAS, but faced problems:
Field meters (power, heat) used Modbus RTU – could not directly connect to BACnet network without extra gateways.
Headquarters required energy data upload to Alibaba Cloud IoT – existing system had no MQTT support.
Operators had to manually read meters and adjust setpoints weekly – heavy workload.
✅ Retrofit with BA190Pro
One BA190Pro per equipment zone (e.g., 4 AHUs + 2 power meters + 1 heat meter).
Modbus RTU acquisition: Isolated RS485 reads voltage, current, active power, energy from power meters; instantaneous flow, accumulated heat from heat meters.
I/O local control: AI captures return/supply air temperature, CO₂; AO controls water valve (0‑10V) and VFD frequency; DO controls fan start/stop, alarm lights.
BACnet/IP to BAS: All I/O points and Modbus data mapped to BACnet objects (AI, AO, DI, DO, AV) for Honeywell BAS monitoring.
MQTT to cloud: Energy data and key operational parameters (AHU run hours, start/stop counts) uploaded to Alibaba Cloud IoT. Real‑time energy ranking and alarms on HQ dashboard.
OPC UA for IT integration: Data exposed via OPC UA to third‑party energy management software for deep analytics.
Remote O&M: Engineers use BLRAT to remotely adjust setpoints, PID parameters, schedules, and even upgrade firmware.
▪ Modbus meter integration: separate gateway, high cost
▪ Cloud support: none
▪ System openness: BACnet only, closed
▪ On‑site maintenance: ≥1 visit per week
📈 After Retrofit
▪ Single BA190Pro
▪ Direct Modbus integration, zero extra cost
▪ MQTT direct to Alibaba Cloud, real‑time sync
▪ BACnet + OPC UA + MQTT fully open
▪ Remote maintenance, no weekly visits
Conclusion: One BA190Pro simultaneously satisfies BAS integration, cloud monitoring, data openness, and remote maintenance. Hardware cost reduced by >50%, O&M efficiency improved by 80%.
More Multi‑Protocol Applications
🏥 Hospital Cleanroom HVAC Constant temp/humidity, positive pressure, energy reporting – Modbus RTU to power meter → MQTT to energy platform; BACnet to hospital BAS.
📊 Data Center Cold/hot aisle monitoring, precision A/C, PUE calculation – OPC UA to DCIM; MQTT to HQ operation center.
🚇 Subway Environmental Control Tunnel ventilation, station A/C, smoke exhaust – BACnet to metro BAS; OPC UA to simulation system.
🌿 Multi‑Building Campus Energy metering, chiller plant group control – MQTT aggregation to campus brain; Modbus TCP to EMS.
🏨 Hotel / Apartment FCU networking, public lighting, energy collection – local logic + cloud setpoints, reducing energy and operational cost.
Compatible with BL192Pro, BL192, BL191, BL190, BL193, BA190, BA190Pro — 3 expansion slots. 🖱️ Click same module multiple times = select multiple slots (e.g., 3× Y31).
Available I/O Modules
💡 Click behavior: Each click adds that module to the next available slot. 🔁 Duplicate allowed: Click same module 2 or 3 times to fill multiple slots (e.g. Y31 + Y31). ⚠️ Y61 (Serial) can be selected only once per controller.
Your Selection (Slots 1–3)
Total modules:0 / 3
Configuration summary
No modules selected. Click any Y‑series module to occupy Slot 1 → Slot 2 → Slot 3.