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(SEM IVA 7.58€)
8 relay module with ports " NC " means " Usually connected to COM " and ports "NO" means " Usually open to COM ".
Relay, as its name implies, implements a relay function. The relay can be used as a switch operated electrically through the coil to mechanically operate a switch, where it is sometimes necessary to control a circuit of another voltage and current load through a separate low power signal, such as a digital signal emitted by a mircoprocessor. Up to 30V DC and 220V AC.