Industrial Protocol Gateways
Bridge the IT/OT Divide: Modbus RTU to TCP, MQTT & JSON Edge Gateways
Stop writing complex polling scripts in your cloud back-end. Valtoris Industrial Gateways process protocols at the edge – translating legacy Modbus RTU telemetry into clean JSON payloads over MQTT, HTTP or TCP/IP. Deploy seamlessly to AWS IoT, Azure, or local Ignition SCADA.
Define Your Data Destination
Select your target platform. We will guide you to the correct hardware layer.
Modbus to MQTT / JSON
Built for the cloud. Our Cellular DTUs and Wi-Fi gateways are edge clients, actively polling RS485 meters and publishing structured JSON objects over secure MQTT (SSL/TLS).
Modbus RTU to TCP Gateway
Designed for Ignition, Wonderware, and local PLCs. Our wired Ethernet gateways solve RS485 polling collisions using Multi-Host caching and instant RTU-to-TCP header translation.
Protocol Gateway Hardware Carriers
Select the physical medium (Ethernet, Cellular, or WiFi) required for your environment. All models below support our advanced Modbus/MQTT edge engine.
| Hardware Series | Network Uplink | Serial Inputs | Primary Gateway Functions | Action |
|---|---|---|---|---|
| VT-DTU500 Series | 4G LTE Cellular | RS232/485 | MQTT (SSL/TLS), JSON, HTTP Post, Modbus Polling | View DTUs |
| VT-WF100 / WF110 | 2.4GHz Wi-Fi & LAN | RS232/485/422 | Modbus RTU to TCP, Virtual COM, TCP Server/Client | View WiFi |
| 1CH ~ 8CH-ETH | Wired Ethernet (DIN-Rail) | 1 to 8 RS485 | Multi-Host Caching, Modbus RTU to TCP, JSON | View Ethernet |
| 16CH / 32CH-ETH | Wired Ethernet (1U Rack) | 16 or 32 Ports | Massive Modbus Aggregation, Virtual COM | View Servers |
Why Use a Dedicated Hardware Gateway?
Software alone cannot fix hardware-level industrial constraints.
Solve Polling Collisions
When two SCADA masters interrogate a single RS485 slave simultaneously, the bus crashes. Our gateways feature Smart Caching, answering queries from memory instantly while protecting the physical bus.
Reduce Network Bandwidth
Our gateways poll locally and only send structured JSON payloads when the thresholds are crossed or the data changes, instead of streaming millions of raw bytes over expensive 4G networks.
End-to-End Encryption
Legacy PLCs lack modern security. Our DTUs and WiFi Gateways act as a secure proxy, wrapping unencrypted Modbus data in SSL/TLS encryption before it traverses the internet to AWS or Azure.
Hardware Watchdog Recovery
The industrial environment is volatile. If the cellular or WiFi connection drops, the independent silicon watchdogs automatically reset the comms module, allowing it to recover without human intervention.
Connect Your Legacy OT to the Cloud Today
Tell us your SCADA architecture, target cloud platform (AWS/Azure/Node-RED), and physical environment. Our integration engineers will recommend the exact gateway SKU and configuration required.
Protocol Integration FAQ
Do I need to write scripts on the gateway to convert Modbus to JSON?
A: No programming needed. Our gateways have a no-code web interface (or VirCom utility). You just enter the Modbus Slave ID, Register Address, Data Format (e.g. IEEE Float AB CD) and give a JSON Key name (e.g. “Temperature”). The gateway does the polling and the JSON formatting for you.
Can the gateway handle reverse commands from the Cloud to the PLC?
A: Yes. The gateways support communication in both directions. Your cloud application can publish a MQTT message (or make an HTTP POST) to the gateway, which will translate the payload back into a standard Modbus RTU write command (e.g. Function Code 06 or 16) and send it down the RS485 line to control a relay or VFD.
How many Modbus TCP masters can simultaneously access a single RS485 slave via the Ethernet gateway?
A: Valtoris Modbus Gateways typically support up to 16 concurrent Modbus TCP client connections per port. Because of the built-in multi-host caching engine, the gateway organizes incoming TCP requests into a queue, polls the RS485 slave efficiently, and returns the answers to all masters without causing serial bus collisions.
Which cloud platforms are compatible with your MQTT Gateways?
A: Our gateways are universally compatible with any standard MQTT v3.1.1 broker. We have successfully deployed thousands of nodes communicating directly with AWS IoT Core, Microsoft Azure IoT Hub, Alibaba Cloud, ThingsBoard, and private Mosquitto/EMQX servers, complete with SSL certificate authentication.
