Modbus IEC104 DLT645 BACnet to OPC UA Protocol Translator BL121ML
  • Modbus IEC104 DLT645 BACnet to OPC UA Gateway
  • Modbus IEC104 DLT645 BACnet to OPC UA Gateway
  • Modbus IEC104 DLT645 BACnet to OPC UA Gateway
  • Modbus IEC104 DLT645 BACnet to OPC UA Gateway
  • Modbus IEC104 DLT645 BACnet to OPC UA Gateway
  • Modbus IEC104 DLT645 BACnet to OPC UA Gateway
  • Modbus IEC104 DLT645 BACnet to OPC UA Gateway
  • Modbus IEC104 DLT645 BACnet to OPC UA Gateway
  • Modbus IEC104 DLT645 BACnet to OPC UA Gateway
  • Modbus IEC104 DLT645 BACnet to OPC UA Gateway

Modbus IEC104 DLT645 BACnet to OPC UA Protocol Translator BL121ML

No.BL121ML
BL121ML OPC UA protocol converter supports conversion of Modbus RTU, Modbus TCP, IEC104, DL/T645, BACnet/IP, BACnet MS/TP protocols to OPC UA protocol. This protocol gateway is widely used in Industry 4.0 systems.
Communication
Ethernet, WiFi
Downlink Protocol
Modbus RTU, Modbus TCP, IEC104, DL/T645, BACnet/IP, BACnet MS/TP
Uplink Protocol
OPC UA
Serial Port
2CH or 6CH RS485/RS232
Baud Rate
2400bps-115200bps
Ethernet Port
1 WAN + 1 LAN
Description
BL121ML OPC UA protocol converter supports conversion of Modbus RTU, Modbus TCP, IEC104, DL/T645, BACnet/IP, BACnet MS/TP protocols to OPC UA protocol. This protocol gateway is widely used in Industry 4.0 systems.

Key Features

Full Protocol Compatibility, Eliminates Data Silos

  • Downstream Support: Modbus RTU/TCP, IEC104, DL/T645, BACnet/IP, BACnet MS/TP
  • Upstream Support: OPC UA protocol, seamless cloud platform integration
  • Transparent Transmission: Bidirectional Modbus RTU↔TCP conversion, simplifying protocol integration

Efficient Data Acquisition & Processing

  • Supports up to 10/50 devices and 512/4000 data points
  • ARM embedded processor (300MHz) + Linux OS for stable edge computing

Industrial-Grade Hardware Design

  • Dual Isolated Ethernet Ports: 2×RJ45 (1WAN+1LAN), supports cascaded switches with built-in 2KV electromagnetic isolation
  • Dual Configurable Serial Ports: 2×RS485/RS232, 2400-115200bps baud rate, 7/8-bit data bits, parity check
  • Wide Voltage Input: DC 9-36V with reverse-connection protection, ultra-low power consumption (85mA@12V)

Smart O&M & Security

  • Remote configuration/firmware upgrades reduce on-site maintenance
  • Hardware + software dual watchdog ensures 24/7 reliability
  • OpenVPN encryption & WPA2/AES wireless security (WiFi optional model)

Typical Applications

Smart Factories: PLC/instrument data → edge computing → MES/SCADA systems
Power IoT: Meter reading (DL/T645) → cloud energy management
Building Automation: HVAC systems (BACnet) → cloud-based optimization

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
USB Port QTY 1xMini USB
Protection Over current protection
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
BL121ML 1 1 2 × × ×
BL121MLW 1 1 2 × ×
BL121MLP 1 1 6 × × ×
BL121MLPW 1 1 6 × ×

  • Shipping Packaging
  • Industrial-grade Gateway x1
  • DIN35 mounting bracket x1
  • Connection Terminalsx1
  • WiFi antenna x1 (Optional)
  • Certificate of conformity x1
  • Warranty card x1
  • Modbus IEC104 DLT645 BACnet to OPC UA Gateway
  • Modbus IEC104 DLT645 BACnet to OPC UA Gateway
  • Modbus IEC104 DLT645 BACnet to OPC UA Gateway
  • Modbus IEC104 DLT645 BACnet to OPC UA Gateway
  • Modbus IEC104 DLT645 BACnet to OPC UA Gateway

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