Are you looking for a Web-IO with an ideal fit in the world of Industry 4.0 and IIoT?
Take a look at the Web-IO 4.0 230V Relay 1xNO, 1xCO (#57832)
Switch remotely…
Using this Web-IO you can control 230V switching signals via TCP/IP Ethernet. There are numerous Web and network services available for switching up to 16A with the two integrated relays – even directly from the browser or from a smart phone. Using protocols such as MQTT and REST the Web-IO is an ideal fit in the world of Industry 4.0 and the Industrial Internet of Things.
Here is an application example – MQTT as switching tunnel, send switching signals barrier-free from A to B
There are cases in which switching signals are needed far away from where they are generated. One good way to bridge such distances is transmission using the Web-IO 4.0 Digital in box-to-box mode over the network. Things become difficult however when the distances are so great that the internet has to be involved as a transmission path.
In principle this would also be possible in box-to-box mode. Since there is a direct connection between the two Web-IOs, the respective routers and firewalls would also have to be configured for such a solution such that access to the local network is possible from the internet side. This is cumbersome, but also a no-go for the IT administrators in most companies.
An alternative is to use MQTT protocol (Message Queuing Telemetry Transport). The corresponding Web-IOs do not communicate directly with each other, and so there is no direct connection. Instead the two Web-IOs open a connection from within the local network to a broker in the internet.
This connection direction is non-critical and generally requires no configuration in routers or firewalls. The broker is a kind of turntable for data. The one Web-IO acts as publisher and sends an input status to the broker. The broker passes this information to the second Web-IO, which as subscriber can receive the switching status. The second Web-IO then switches its output to the received switching state.
