BACnet to Modbus HVAC Protocol Converter BL120BN
  • BACnet to Modbus Gateway
  • BACnet to Modbus Gateway
  • BACnet to Modbus Gateway
  • BACnet to Modbus Gateway
  • BACnet to Modbus Gateway
  • BACnet to Modbus Gateway
  • BACnet to Modbus Gateway
  • BACnet to Modbus Gateway
  • BACnet to Modbus Gateway
  • BACnet to Modbus Gateway

BACnet to Modbus HVAC Protocol Converter BL120BN

No.BL120BN
BL120BN HVAC BACnet protocol converter is designed to transmit communications from BACnet devices to Modbus devices for building automation. 
A typical scenario in industrial applications is integration of BACnet/IP or BACnet MS/TP devices into a Modbus TCP or Modbus RTU installatio
Communication
Ethernet, 4G, WiFi
Downlink Protocol
BACnet MS/TP, BACnet/IP
Uplink Protocol
Modbus RTU, Modbus TCP
Serial Port
2CH or 6CH RS485/RS232
Description
BL120BN HVAC BACnet protocol converter is designed to transmit communications from BACnet devices to Modbus devices for building automation. 
A typical scenario in industrial applications is integration of BACnet/IP or BACnet MS/TP devices into a Modbus TCP or Modbus RTU installatio

Key Features

Smart Data Acquisition

  • Connect 10/50 devices simultaneously, collect 512/4000 data points.

  • Dual-channel RS485/RS232 (baud rate 2400-115200bps, 7/8-bit data bits adjustable).

  • Supports cascaded switch device acquisition with high scalability.

Multi-Network Interconnection

  • 1 WAN + 1 LAN dual Ethernet ports (10/100M auto-negotiation, 2KV EMI isolation).

  • Smart Network Failover: Prioritizes wired connection → Automatically switches to 4G when wired fails (optional module).

  • OpenVPN support for encrypted data security.

Efficient Remote O&M

  • PC software remote configuration

  • Remote firmware upgrades to reduce on-site maintenance costs.

  • Real-time monitoring: Chip temperature/memory/network signal status.

Typical Applications

Smart Factories: Integrating PLCs (Modbus) with BMS (BACnet).
Smart Buildings: Connecting HVAC (BACnet) to IIoT platforms.
Remote Monitoring: 4G backup ensures always-on connectivity for edge devices.

Technical Specifications

Parameter Description
System Processor Clock speed 300Mhz
Storage 128MB
Flash Memory 64MB
Power Supply Input Voltage DC 9~36V 
Power Consumption Normal: 70mA@12V, Max: 168mA@12V
Wiring Anti-reverse connection protection
Ethernet Port Specification 2 x RJ45, 10/100Mbps, adaptive MDI/MDIX
Protection ESD: ±6kV(Contact), ±8kV(Air)
EFT: 1kV, 5kHz
Serial Port QTY 2CH or 6CH RS485/RS232
Baud Rate 2400bps-115200bps
Data Bit 7,8
Parity Bit None, Even, Odd
Stop Bit 1, 2
Protection ESD: ±6kV(Contact), ±8kV(Air)
SURGE  ±1kV, 8/20us
EFT: 1kV, 5kHz
SIM Card Slot QTY 1
Specification Drawer type, support 1.8V/3V SIM/UIM card(NANO)
Protection Built-in 15KV ESD protection
USB Port QTY 1xMini USB
Protection Over current protection
4G
(Optional)
Antenna QTY 1
Antenna Type SMA Hole 
GPS
(Optional)
Antenna QTY 1
Antenna Type SMA Hole
Tracking Sensitivity > -148 dBm
Flat Position Precision 2.5m
Protocol NMEA-0183 V2.3
WiFi
(Optional)
QTY 1
Type SMA
Protocol 802.11a/b/g/n (mixed)
Mode Client Mode
Channel 2.4G Channel 1 - 13,5G Channel 36 - 165
Security Security
Encrypted AES, TKIP, TKIPAES
Speed 150Mbps (Max)
Distance Unobstructed/open outdoor coverage up to 20 meters
SSID broadcast switch Support
Indicator PWR Always on when device powered on 
RUN Flickering when system running
Off when system shutdown
LINK Flickering when Ethernet communication; Always on when 4G or WiFi communication; OFF when Ethernet, 4G, WiFi are all disconnected.
Software Internet Protocol IPV4, TCP/UDP, DHCP, DNS, etc
IP Retrieving Static IP/DHCP
Transparent Transmission Support
DNS Support Domain Name resolution
Configuration PC software configuration, support WIN 7, WIN 8, WIN 10 and WIN11
Network Cache Transmitting: 8Kbyte; Receiving: 8Kbyte
Safety Regulations EMC CE, FCC
EMS IEC 61000-4-2 (ESD) Level 3
IEC 61000-4-4 (EFT) Level 3
IEC 61000-4-5 (Surge)Level 3
Vibration IEC60068-2-6
Environment Working -40~85℃, 5~95% RH
Storage -40~85℃,5~95% RH
Others Housing Material Plastic
Size 40×83×110mm/30×83×110mm (LxWxH)
Protection  IP30
Net Weight 171g/133g
Mounting DIN Rail Mounting/Wall-mounting

Model Selection

Model WAN LAN COM(RS485)
(Optional RS232)
WiFi 4G GPS
BL120BN 1 1 2 × × ×
BL120BNL 1 1 2 × ×
BL120BNLG 1 1 2 ×
BL120BNW 1 1 2 × ×
BL120BNP 1 1 6 × × ×
BL120BNPL 1 1 6 × ×
BL120BNPLG 1 1 6 ×
BL120BNPW 1 1 6 × ×

Shipping Packaging
  • Industrial-grade Gateway x1
  • DIN35 mounting bracket x1
  • Connection Terminalsx1
  • WiFi antenna x1 (Optional)
  • Cellular antenna x1(Optional)
  • GPS antenna x1  (Optional)
  • Certificate of conformity x1
  • Warranty card x1
  • BACnet to Modbus Gateway
  • BACnet to Modbus Gateway
  • BACnet to Modbus Gateway
  • BACnet to Modbus Gateway
  • BACnet to Modbus Gateway

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