IoT Gateway

LM Gateway203-IoT data acquisition gateway, based on a solid hardware platform design, a complete software kernel. Provides 2 RS-485 serial ports, 1 10/100 Mbps Ethernet port, and supports 4G modules. The gateway is embedded with Modbus, BACnet, DLT645 and other data acquisition drivers. It provides proprietary protocol driver integration. The gateway acts as Modbus RTU. The Modbus TCP server provides external data. The gateway and cloud platform use the instant messaging protocol MQTT to transmit data. The gateway data points are released through subscription. The mechanism is pushed to the cloud, and the cloud can read and write to the front-end device through the gateway.

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CPUARM926EJ, clocked at 300MHz
Memory64MByte High Performance Memory
Nand Flash128MByte SLC Flash
Serial PortTwo fully isolated RS485/RS232 interface multiplexing
Network PortOne ​​100M/10M Ethernet Interface
4G ModuleBuilt-in 4G Full Netcom Module
PowerDC9V~36V, support anti-reverse, anti-thunder, over-current protection, etc.
Whole weight370g
Shell protection levelIP51
Installation Dimensions135mm×111mm×35mm (L×W×H) with mounting ears
Mechanical InstallationDIN Rail Card Slots
Power ConsumptionMaximum power consumption of the motherboard ≤3W
Working temperature-40~85°C
Work Relative Humidity20~90% No Condensation
InstrumentationData acquisition driverSerial portNetwork port
Modbus protocolModbus RTUModbus TCP, Modbus RTU_over_TCP
DLT645 protocolDLT645-1997, DLT645-2007/
CJ188 protocolCJ188/
MbusMBus_EnergyMeter, MBus_EN1434/
PLCMitsubishi AgreementMitsubishi Fx3U/
Mitsubishi Fx485/
Siemens protocolSiemens S7-200 PPISiemens S7-200 Network
/Siemens S7-300 Network
/Siemens S7-400 Network
/Siemens S7-1200 Network
/Siemens S7-1500 Network
Building communicationBACnet protocolBACnet MS/TPBACnet IP
Industrial control and automation interface standardsOPC protocol/OPC UA, OPC DA, OPC XML DA
Substation communication standardIEC protocol/IEC104
Non-standard protocolInstrumentationYiling temperature controller/
dlt645 JX Digital/
dlt645-2007 extended protocol/
Jiangsu Runyi Water Meter/
HL-MODBUS protocol/
CJ/T133-2012 IC card water meter/
DLT645-Fee Control/
CJ/T133-2012 MBus IC card water meter/
modbus Shendong 43/
Beijing Mingcheng Zhonghui Sunshade Curtain/
Internet interfaceInternet collection/mqtt client subscription
/Gold map weather forecast
/Zhejiang Dahua HTTP
/HTTP collection
/Air Quality
  • Gateway acts as Modbus RTU, Modbus TCP server provides external data

    Support 0x, 1x, 3x, 4x, 4 functional areas

    Supports int16, int32, float32 and various data types

  • The gateway provides an http server, which supports two common methods of GET and POST. Users can retrieve the real-time data and stored historical data of the gateway through the http server interface.

  • The gateway can serve as an MQTT client, connecting Alink (Alibaba Cloud), Baidu Cloud, Tencent Cloud, Tlink and other private clouds.

    Push the data points of the gateway to the cloud through a subscription and publishing mechanism. The gateway reads and writes the front-end equipment.Romi Measurement & Control launched the IoT data center, which is convenient for users to verify IoT applications such as gateways, cloud services, and WeChat public accounts.

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