Good morning.

Our workshop is connecting equipment to the network and we want to transmit the operating temperature, input current, and actual torque of several magnetic particle brakes for predictive maintenance.

I've read that some newer magnetic particle brakes integrate sensors and communication modules, allowing data transmission via Profinet or EtherCAT. Can we add an external monitoring module to our older equipment?

We don't want to significantly modify the existing control system. Are there any readily available small-box solutions? We only need to collect key parameters and remotely monitor the curve changes.

Any guidance or suggestions would be greatly appreciated.

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Do your present systems have temperature and torque displays locally? On their control panel, if they have one?? Especially the torque output. THAT sensor may already be present, but if not then adding torque sensing could be a "big deal" sort of project. The basic sensors for those variables have been available for a long time. BUT if they are not installed then it will take some effort.
And this time, reading more carefully, I see the goal is to connect it to a LAN, NOT the internet. THAT makes a lot more sense.
The challenge will be all of the wiring, if there is not already a single control console.

 

There's a lot of DIY IOT for home automation that could probably be adapted or used as a starting point. Look into "mysensors" and Tasmota

 

The first requirement will be to have on hand an interface module that accepts the analog outputs from your particle brake dynomometer and converts them into digital signals that can be sent on the present network. But since we have no information about which communications format uses, it is hard to make any correct recomendation.