BL121AC Series · 2 or 6 serial ports · Collects Modbus RTU/TCP air conditioning units · Outputs OPC UA to SCADA/MES/IIoT
Choose BL121AC for small to medium HVAC projects, or BL121ACP for large‑scale air conditioning system integration. Both support optional WiFi.
| Feature | BL121AC (Standard) | BL121ACP (High‑Performance) |
|---|---|---|
| Serial Channels | 2 × RS485/RS232 | 6 × RS485/RS232 |
| Max. AC Units | 10 | 50 |
| Data Points | 512 | 4,000 |
| Downlink Protocols | Modbus RTU Master · Modbus TCP Master | Modbus RTU Master · Modbus TCP Master |
| Uplink Protocol | OPC UA | OPC UA |
| WiFi (Optional) | ✓ 802.11a/b/g/n | ✓ 802.11a/b/g/n |
| Dimensions (L×W×H) | 30 × 83 × 110 mm | 40 × 83 × 110 mm |
| Weight | 133 g | 171 g |
| Best Fit | Small / Medium HVAC Projects | Large‑Scale AC System Integration |
Engineered for HVAC system integration with seamless Modbus AC to OPC UA conversion and standardized data access.
Collects operating data from Modbus RTU and Modbus TCP air conditioning units — outputs to OPC UA for standardized HVAC data access.
OPC UA provides secure, platform‑independent, and standardized data access — seamless integration with BMS, SCADA, and enterprise systems.
Bridge distributed air conditioning units to OPC UA platforms — enabling centralized monitoring, control, and analytics.
Optional WiFi for flexible network deployment — ideal for locations where wired Ethernet is unavailable or impractical.
9–36V DC wide input, reverse‑polarity protection, -40~85°C operation, EMC Level 3 (ESD/EFT/Surge), 2KV isolation.
DIN35 rail or wall mounting with patented rail‑clip — quick installation in electrical panels, mechanical rooms, and equipment enclosures.
Click a tab below for detailed module parameters. Both models share the same core platform.
Designed for building system integrators, facility managers, and HVAC contractors.
Bridge Modbus AC units, chillers, and AHUs to OPC UA BMS and SCADA systems — enable real‑time HVAC monitoring and control.
Monitor AC unit energy consumption, temperature setpoints, and operating modes via OPC UA for energy optimization and demand response.
Connect HVAC systems to OPC UA‑based IIoT platforms — unlock data for predictive maintenance and digital twin applications.
Deploy OPC UA servers at remote sites via WiFi — centralize HVAC data from distributed buildings into a single OPC UA client.
