diagnostic relays allow the user to know the state of the load (resistive load), of the relay output and of the network thanks to a NC (Normally Closed) diagnostic contact.
The diagnostic function does not require an external power supply (celduc® patent) and the contacts can be connected in series. It is possible to use these relays for diagnosis in a three-phase system, star wiring without neutral.
Defects detected :
– Mains present
– Load disconnected
– Relay short-circuited
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+33 (0) 4 77 53 90 21
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