Helmholz PN/MQTT Coupler

The MQTT protocol has become established in recent years as a simple transmission protocol for messages in the IoT world. MQTT stands for "Message Queue Telemetry Transport Protocol" and is an OASIS standard. The MQTT protocol always uses a central broker for communication between devices, which receives messages from, for example, a sensor and forwards them to interested devices, such as a control unit. When a sensor sends data to the broker, it is called a "publish." If a device needs data, it must subscribe to the broker ("subscribe"). The broker delivers the data to all subscribers when new data has arrived from the publisher.

With the PN/MQTT Coupler, it is possible to transfer values between a PROFINET machine (PLC) and an MQTT broker. It is possible to send values from the PLC via PROFINET to a broker ("publish") as well as to subscribe to values from an MQTT broker and receive them in the PLC via PROFINET ("subscribe"). Integration into the PLC engineering tool is enabled by a GSDML file; additional configuration software is not necessary. All settings for the MQTT connection can be done on the device's web page. MQTT brokers can be connected locally in your own network ("on premise") as well as via the internet in the cloud.

• Easy assignment of IO data via GSDML file
• Up to 100 values can be configured for transmission simultaneously
• Flexible configuration via web browser
• Separate networks for PROFINET and MQTT connection
• Connection to brokers in the local network or directly with the "cloud"
• Authentication (password, certificate) and encryption (TLS)
• Supports AWS IoT, Microsoft Azure, HiveMQ, Siemens Mindsphere (in preparation)
• Very compact design for DIN rail mounting
• Redundant power supply
• Galvanic isolation of the networks

For more information, download the attached flyers.