viliv Posted June 6 Share Posted June 6 Hello can the Shelly Pro 2 switch DC voltage with the relays? It would be 24V DC. The new ones don`t mention this. Quote Link to comment Share on other sites More sharing options...
Administrators Olsche Posted June 6 Administrators Share Posted June 6 No DC switching is not supported with the Pro 2, a separate relay is required. A alternative is Shelly Pro3: https://kb.shelly.cloud/knowledge-base/shelly-pro-3-v1 Quote Link to comment Share on other sites More sharing options...
Members thgoebel Posted June 6 Members Share Posted June 6 Unfortunately, the specification says something about switching alternating current only. If you have a look into the device and the built-in relay type, you‘ll find a HONGFA HF32FV-16. Its data sheet also only mentions contact details for AC load. So you have to read and use your common sense: Switching DC voltage loads, especially inductive ones, such as motors and magnetic coils, significantly shortens the service life of relay contacts. The reason is that when direct current is switched off, there is no zero passage that extinguishes a possibly created arc. DC loads above 1A at 30V are generally considered critical by relay manufacturers. You can completely prevent switch-off light arcs by suitable switching measures (freewheel diodes) or dampen them with spark extinguishing elements. Which load should be switched? What is the current consumption? Quote Link to comment Share on other sites More sharing options...
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