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Industrial Modbus to MQTT gateways - secure IoT communication, SSL/TLS

MQTT Modbus gateway scheme

Industrial Modbus to MQTT converters, Modbus-MQTT IoT gateways

In this section of our shop you will find converters that allow you to connect your devices to the Modbus communication protocol via an MQTT server. Modbus is a communication bus used in industrial automation for, among other things, communication with controllers, control systems, air conditioning, heating, BMS, machines and robots and much more. Gateways allow two-way communication of Modbus devices such as PLCs or sensors with an MQTT server, meaning both the publication of data from Modbus devices and the transmission of data towards end devices from the MQTT server.

Learn more about our Modbus to MQTT converters

The Modbus-MQTT gateways available in our range offer a wide range of power supply voltages of 12-35VDC or 24VAC, easy DIN rail mounting, resistance to electromagnetic interference and the possibility of installation in industrial environments, with a wide operating temperature range from -40°C to 85°C. The industrial features of the product guarantee long, trouble-free operation and the possibility of installation in applications exposed to both frost (e.g. cold stores) and the high temperatures generated by industrial control cabinets.

Our Modbus to MQTT converters are devices that support standard Ethernet to RJ45 type connectors (Modbus TCP and programming) as well as RS-232 and RS-485 on screw connectors (Modbus RTU and service port). The gateways can operate in one of two modes, Modbus slave or master, depending on the version. The converter in Modbus master mode allows data to be read from any Modbus slave devices and data to be published to the MQTT server. A converter in Modbus slave mode, on the other hand, allows any Modbus master to write and read data from the MQTT server.

Thanks to the free software included with each device, the converters are easy and quick to configure and do not require additional licences. The converters are compatible with all IoT servers such as Microsoft Azure, IBM Cloud, AWS, Google cloud etc..., and the communication between the converter and the server can be encrypted using TLS/SSL. 

Select the Modbus to MQTT converter you are interested in and read the detailed technical description:

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HD67933-2-B2 - Modbus Master to MQTT converter with TLS/SSL, housing type B, DIN rail mount, RS-232 port, RJ45 Ethernet, 115200 bps, IIoT integration HD67933-2-B2 - Modbus Master to MQTT converter with TLS/SSL, housing type B, DIN rail mount, RS-232 port, RJ45 Ethernet, 115200 bps, IIoT integration
2 year warranty Quantity discount 3-4 days
Brand: ADF Web Model: HD67933-2-B2
HD67933-2-B2 - Modbus Master to MQTT converter with TLS/SSL, housing type B, DIN rail mount, RS-232 port, RJ45 Ethernet, 115200 bps, IIoT integration
Industrial Modbus master to MQTT converter, housing type B (wide), DIN rail mount. The HD67933-B2 is a high-performance industrial gateway designed to connect Modbus Master networks to MQTT-based IoT platforms. It enables real-time publishing of data read from Modbus Slave devices into MQTT servers, providing a direct bridge between traditional automation systems and the modern Industrial Internet of Things (IIoT). This allows process data..
1 029,30 zł
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HD67933-4-B2 - Modbus Master to MQTT converter with TLS/SSL, RS-485, RJ45 Ethernet, housing type B, DIN rail mount, 115200 bps, for IIoT integration HD67933-4-B2 - Modbus Master to MQTT converter with TLS/SSL, RS-485, RJ45 Ethernet, housing type B, DIN rail mount, 115200 bps, for IIoT integration
2 year warranty Quantity discount 3-4 days
Brand: ADF Web Model: HD67933-4-B2
HD67933-4-B2 - Modbus Master to MQTT converter with TLS/SSL, RS-485, RJ45 Ethernet, housing type B, DIN rail mount, 115200 bps, for IIoT integration
Industrial Modbus master to MQTT converter, housing type B (wide), DIN rail mount.  The HD67933-4-B2 is a high-performance industrial gateway that enables direct integration between Modbus Master networks and MQTT-based IoT platforms. It allows users to publish data read from Modbus Slave devices into an MQTT server in real time, creating a bridge between traditional field devices and modern IIoT infrastructures. With TLS/SSL encryption..
1 029,30 zł
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HD67934-2-B2 - Modbus Slave to MQTT converter with TLS/SSL, RS-232, RJ45 Ethernet, sniffer mode, housing type B, DIN rail mount, 115200 bps, IIoT integration
2 year warranty Quantity discount 3-4 days
Brand: ADF Web Model: HD67934-2-B2
HD67934-2-B2 - Modbus Slave to MQTT converter with TLS/SSL, RS-232, RJ45 Ethernet, sniffer mode, housing type B, DIN rail mount, 115200 bps, IIoT integration
Industrial Modbus slave to MQTT converter, housing type B (wide), DIN rail mount.  The HD67934-2-B2 is a high-performance industrial gateway that enables seamless integration between Modbus Slave devices and MQTT-based IoT infrastructures. It allows both publishing and receiving data via an MQTT server, enabling full bidirectional communication with Modbus Masters such as PLCs, SCADA systems, or building management controllers. In addit..
1 029,30 zł
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HD67934-4-B2 - Modbus Slave to MQTT converter with TLS/SSL, RS-485, sniffer mode, DIN rail mount, housing type B
2 year warranty Quantity discount 3-4 days
Brand: ADF Web Model: HD67934-4-B2
HD67934-4-B2 - Modbus Slave to MQTT converter with TLS/SSL, RS-485, sniffer mode, DIN rail mount, housing type B
Industrial Modbus slave to MQTT converter, housing type B (wide), DIN rail mount. HD67934-4-B2 is a high-performance industrial gateway designed to seamlessly integrate Modbus Slave devices with the IoT ecosystem using the MQTT protocol. It enables both publishing and retrieving data from an MQTT Server via a Modbus Master, such as PLC, SCADA systems, or building management systems. Additionally, the device supports an advanced Sniffer mod..
1 029,30 zł
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HD67935-B2 - Modbus TCP Master to MQTT converter with TLS/SSL, 1x Ethernet, DIN rail mount, secure IoT integration, 10/100 Base-T, housing type B
2 year warranty Quantity discount 3-4 days
Brand: ADF Web Model: HD67935-B2
HD67935-B2 - Modbus TCP Master to MQTT converter with TLS/SSL, 1x Ethernet, DIN rail mount, secure IoT integration, 10/100 Base-T, housing type B
Industrial Modbus TCP master to MQTT converter, housing type B (wide), DIN rail mount. The HD67935-B2 is a robust industrial gateway that enables seamless integration between a Modbus TCP Master network and the IoT ecosystem using the MQTT protocol. It allows reading data from multiple Modbus TCP slave devices and publishing it directly to an MQTT server, as well as receiving commands from MQTT and forwarding them to Modbus TCP devices. Th..
1 029,30 zł
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HD67936-B2 - Modbus TCP Slave to MQTT with TLS/SSL,, Type B housing DIN-rail
2 year warranty Quantity discount 3-4 days
Brand: ADF Web Model: HD67936-B2
HD67936-B2 - Modbus TCP Slave to MQTT with TLS/SSL,, Type B housing DIN-rail
Industrial Modbus TCP slave to MQTT converter, housing type B (wide), DIN rail mount.  HD67936-B2 allows to integrate a Modbus TCP network with the IoT world based on MQTT net. It also allows to publish and get the data into/from a MQTT Server using a Modbus TCP Master (like PLC, SCADA etc.). By bridging Modbus registers to MQTT topics, the device exposes field data to dashboards and analytics without changing existing PLC logic. E..
1 029,30 zł
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Modbus RTU master to MQTT converter, 1x RS-232, Mini-Fit, mounting brackets, PCB Treatment Varnished
2 year warranty Quantity discount 3-4 days
Brand: ADF Web Model: HD674-A036-2-E4V
Modbus RTU master to MQTT converter, 1x RS-232, Mini-Fit, mounting brackets, PCB Treatment Varnished
Industrial Modbus master to MQTT converter, E-type housing (robust and rugged), RS232 port, Mini-Fit connector, 4KV triple insulation, painted shell The HD674-A036-2 allows the integration of a Modbus network into the IoT world based on the MQTT network. It also allows data read from Modbus slaves to be published to an MQTT server. This gateway allows quick and easy access to the IoT world and is compatible with IoT servers that support the..
1 545,83 zł
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Modbus RTU master to MQTT converter, 1x RS-485, Mini-Fit, mounting brackets, varnished PCB coating
2 year warranty Quantity discount 3-4 days
Brand: ADF Web Model: HD674-A036-4-E4V
Modbus RTU master to MQTT converter, 1x RS-485, Mini-Fit, mounting brackets, varnished PCB coating
Industrial Modbus master to MQTT converter, E-type housing (robust and rugged), RS485 port, Mini-Fit connector, 4KV triple insulation, painted shell The HD674-A036-4 allows the integration of a Modbus network into the IoT world based on the MQTT network. It also allows data read from Modbus slaves to be published to an MQTT server. This gateway allows quick and easy access to the IoT world and is compatible with IoT servers that support the..
1 545,83 zł
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Modbus RTU master to MQTT converter, 1x RS-232, DIN rail mounting Modbus RTU master to MQTT converter, 1x RS-232, DIN rail mounting
2 year warranty Quantity discount 3-4 days
Brand: ADF Web Model: HD67933-2-G43-B2
Modbus RTU master to MQTT converter, 1x RS-232, DIN rail mounting
Industrial Modbus master to MQTT converter, housing type B (wide), DIN rail mounting, RS232 port, LAN + SIM LTE The HD67933-2-G43-B2 allows the integration of Modbus networks into the IoT world based on the MQTT network. It also allows data read from Modbus slaves to be published to an MQTT server. This gateway allows quick and easy access to the IoT world and is compatible with IoT servers that support the MQTT protocol. MQTT communication..
1 649,23 zł
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Modbus RTU master to MQTT converter, 1x RS-232, SuperSeal, mounting brackets, varnished PCB coating
2 year warranty Quantity discount 3-4 days
Brand: ADF Web Model: HD674-A036-2-E7V
Modbus RTU master to MQTT converter, 1x RS-232, SuperSeal, mounting brackets, varnished PCB coating
Industrial Modbus master to MQTT converter, E-type housing (robust and rugged), RS232 port, SuperSeal 1.5 connector, 4KV triple insulation, painted shell The HD674-A036-2 allows the integration of the Modbus network into the IoT world based on the MQTT network. It also allows data read from Modbus slaves to be published to an MQTT server. This gateway allows quick and easy access to the IoT world and is compatible with IoT servers that supp..
1 649,23 zł
Add to Cart
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Modbus RTU master to MQTT converter, 1x RS-485, DIN rail mounting Modbus RTU master to MQTT converter, 1x RS-485, DIN rail mounting
2 year warranty Quantity discount 3-4 days
Brand: ADF Web Model: HD67933-5-G43-B2
Modbus RTU master to MQTT converter, 1x RS-485, DIN rail mounting
Industrial Modbus master to MQTT converter, housing type B (wide), DIN rail mounting, RS485 port, LAN + SIM LTE The HD67933-5-G43-B2 allows the integration of Modbus networks into the IoT world based on the MQTT network. It also allows data read from Modbus slaves to be published to an MQTT server. This gateway allows quick and easy access to the IoT world and is compatible with IoT servers that support the MQTT protocol. MQTT communication..
1 649,23 zł
Add to Cart
Add to Wish List Compare this Product
Quickview
Modbus RTU master to MQTT converter, 1x RS-485, SuperSeal, mounting brackets, varnished PCB coating
2 year warranty Quantity discount 3-4 days
Brand: ADF Web Model: HD674-A036-4-E7V
Modbus RTU master to MQTT converter, 1x RS-485, SuperSeal, mounting brackets, varnished PCB coating
Industrial Modbus master to MQTT converter, E-type housing (robust and rugged), RS485 port, SuperSeal 1.5 connector, 4KV triple insulation, painted shell The HD674-A036-4 allows the integration of the Modbus network into the IoT world based on the MQTT network. It also allows data read from Modbus slaves to be published to an MQTT server. This gateway allows quick and easy access to the IoT world and is compatible with IoT servers that supp..
1 649,23 zł
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