Éducation2 min de lecture

Qu'est-ce qu'une passerelle IoT industrielle ? Le pont entre votre atelier et le cloud

TSL Automation Solutions 17 juin 2025 Mis à jour le 18 mai 2026

Passerelle IoT industrielle, PC sur rail DIN reliant l'usine au cloud, TSL Automation Solutions

Sommaire

What Does an Industrial IoT Gateway Do?

An industrial IoT (IIoT) gateway is a hardware device that sits between the operational technology (OT) layer, your PLCs, sensors, drives, and HMIs, and the information technology (IT) layer, your cloud platform, MES, ERP, or data analytics system. Its primary jobs are:

Protocol translation, converting Modbus RTU, PROFIBUS, EtherNet/IP, and other industrial protocols into MQTT, REST/HTTP, or OPC UA that cloud platforms understand
Data aggregation, collecting data from tens or hundreds of field devices and consolidating it into a single data stream
Edge processing, filtering, compressing, and pre-processing data locally to reduce bandwidth and cloud processing costs
Security enforcement, acting as a firewall between the OT network and the IT/cloud network
Store-and-forward, buffering data locally when the internet connection drops, then forwarding it when connectivity resumes

Key Components of an IIoT Gateway

A complete IIoT gateway solution consists of three layers:

Hardware, a rugged embedded PC with multiple COM ports, dual LAN, and often a 4G modem. DIN rail form factor for easy cabinet mounting.
Protocol drivers, software drivers that speak the field device protocols (Modbus, PROFIBUS, BACnet, EtherNet/IP, OPC DA/UA)
Gateway software, the platform that manages protocol translation, data routing, and cloud connectivity

Popular Gateway Software Platforms

Platform	Type	Best For
Node-RED	Open-source, visual flow editor	Custom integrations, rapid prototyping, Modbus to MQTT
Ignition Edge	Commercial (Inductive Automation)	SCADA edge node, OPC UA server at the edge
AWS IoT Greengrass	Amazon cloud extension	AWS-centric deployments, local Lambda functions
Azure IoT Edge	Microsoft cloud extension	Azure-centric deployments, container-based modules
Kepware	Commercial (PTC)	Industrial protocol aggregation, OPC UA server
MQTT Broker (Mosquitto)	Open-source	Lightweight MQTT brokering at the edge

Hardware Requirements for an IIoT Gateway

The gateway hardware must be reliable, compact, and able to handle multiple communication interfaces simultaneously. Key requirements include:

DIN rail mounting, for easy installation inside existing control cabinets
Multiple COM ports, RS-232/422/485 for legacy field devices
Dual LAN ports, one for the OT network (PLC side), one for the IT/WAN side
4G/LTE modem slot, for remote sites without fixed internet
Wide temperature range, control cabinets can reach 50 à 60°C
Fanless design, no maintenance in sealed cabinets
Sufficient RAM and storage, for gateway software and local data buffering

Avalue DIN Rail PCs as IIoT Gateways

Avalue Technology's DIN rail embedded PCs are purpose-built for the IIoT gateway role. They combine a fanless embedded processor, multiple serial ports, dual Gigabit LAN, optional 4G modem, and wide temperature operation in a compact DIN rail chassis that fits directly into existing control cabinets. Running Windows IoT or Linux, they support all major gateway software platforms including Node-RED, Ignition Edge, and Azure IoT Edge.

TSL Automation Solutions supplies Avalue DIN rail PCs across India with full technical support for gateway deployments. Contact us to discuss your IIoT gateway project.

Questions fréquentes

An industrial IoT gateway is a device that connects factory floor equipment (PLCs, sensors, drives, meters) to higher-level systems (SCADA, MES, cloud platforms) by translating between industrial protocols (Modbus, OPC UA, PROFIBUS) and IT/cloud protocols (MQTT, REST API, OPC UA over internet). It enables legacy machines without ethernet connectivity to participate in IIoT data collection without replacing the machine controller.

Industrial IoT gateways typically support southbound (field side) protocols including Modbus RTU, Modbus TCP, OPC DA/UA, BACnet, EtherNet/IP, DNP3, PROFIBUS (with hardware card), and serial ASCII. Northbound (cloud/IT side) protocols include MQTT, OPC UA, REST/HTTP, AMQP, and direct cloud SDK integration (AWS IoT, Azure IoT Hub, Google IoT Core).

Industrial IoT gateways use compact fanless industrial PCs (DIN rail PCs, 3.5-inch SBC platforms), dedicated gateway appliances from vendors like Moxa, Advantech, or Red Lion, or software-defined gateways running on standard industrial PCs. Running gateway software (Node-RED, Kepware KEPServerEX, Ignition Edge) on an Avalue compact industrial PC is a flexible and cost-effective approach for custom gateway applications.

An IoT gateway focuses on data collection, protocol translation, and upstream data transmission, it doesn't typically include an operator interface, alarm management, or historical trending. A SCADA system provides comprehensive supervisory control including visualisation, alarm management, historian, and control capability. IoT gateways are often used as edge nodes feeding data to cloud-based analytics or to SCADA systems.

Yes, TSL Automation Solutions supplies Avalue compact industrial PCs and DIN rail embedded computers suitable for IoT gateway applications in India, pre-loadable with gateway software such as Ignition Edge or OPC UA servers. Contact our Mumbai team for gateway hardware recommendations for your specific protocol translation requirements.

Mots-clés : industrial IoT gateway IIoT gateway explained factory to cloud gateway Node-RED industrial gateway Azure IoT Edge gateway Avalue DIN rail PC gateway protocol translation gateway India

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TSL Automation Solutions

Responsable marketing, TSL Automation Solutions

Sanjana couvre les tendances de l'automatisation industrielle, les lancements de produits et les analyses technologiques pour TSL Automation Solutions, distributeur basé à Mumbai d'IHM, de Panel PC et de systèmes informatiques embarqués au service des industriels en Inde et dans le monde.