Modbus PLC to MQTT OPC UA Industrial Gateway BL104
  • PLC to MQTT OPC UA Gateway
  • PLC to MQTT OPC UA Gateway
  • PLC to MQTT OPC UA Gateway
  • PLC to MQTT OPC UA Gateway
  • PLC to MQTT OPC UA Gateway
  • PLC to MQTT OPC UA Gateway
  • PLC to MQTT OPC UA Gateway
  • PLC to MQTT OPC UA Gateway
  • PLC to MQTT OPC UA Gateway
  • PLC to MQTT OPC UA Gateway

Modbus PLC to MQTT OPC UA Industrial Gateway BL104

No.BL104
BL104 gateway converts Modbus, PLC to OPC UA and MQTT, enabling seamless data interoperability between different devices and systems in industrial environments, supporting better decision-making and operational control.
Communication
Ethernet, 4G, WiFi
Downlink Protocol
Modbus RTU, Modbus TCP, PLC Protocol (Siemens, Mitsubishi, Omron, Delta PLC )
Uplink Protocol
Modbus RTU, Modbus TCP, OPC UA, MQTT
Serial Port
2CH or 6CH RS485/RS232
Baud Rate
2400bps-115200bps
Ethernet Port
1 WAN + 1 LAN
Description
BL104 is an industrial IoT gateway that converts Modbus RTU, Modbus TCP, PLC to Modbus, OPC UA, MQTT protocol. The gateway supports Ethernet, WiFi, or cellular networks(4G) transmission, ensuring that data is transmitted to AWS, ThingsBoard, IgnitionSCADA, and other cloud platforms stably and reliably.

Key Features

Universal Protocol Support

  • Downlink: Siemens/Mitsubishi/Omron/Delta PLCs, Modbus RTU/TCP Master
  • Uplink: Modbus RTU/TCP, OPC UA, MQTT
  • Cloud Ready: Pre-built drivers for AWS IoT/ThingsBoard/Huawei Cloud/Aliyun/BLIIOT Cloud

Powerful Edge Computing

  • ARM MCU @300MHz + Linux OS
  • Connect 10/50 devices & collect 512/4000 data points simultaneously
  • Hardware/software watchdog for 24/7 reliability

Flexible Connectivity

  • Dual Ethernet (1×WAN + 1×LAN) with switch cascading
  • Optional 4G/WiFi failover (auto-switch to 4G if wired fails)
  • Built-in OpenVPN for secure data transmission

Typical Applications

Smart Factories: PLC remote debugging + real-time production data to cloud
Energy Monitoring: Centralized Modbus meter management
Predictive Maintenance: Failure alerts + remote firmware updates
Environmental Sensing: Cloud transmission for temp/humidity sensors

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
BL104 1 1 2 × × ×
BL104L 1 1 2 × ×
BL104LG 1 1 2 ×
BL104W 1 1 2 × ×
BL104P 1 1 6 × × ×
BL104PL 1 1 6 × ×
BL104PLG 1 1 6 ×
BL104PW 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
  • PLC to MQTT OPC UA Gateway
  • PLC to MQTT OPC UA Gateway
  • PLC to MQTT OPC UA Gateway
  • PLC to MQTT OPC UA Gateway
  • PLC to MQTT OPC UA Gateway

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