Sommario
Cosa significa 24 volt DC?
In elettrotecnica la corrente continua (CC o DC, dall’inglese: Direct Current) è un tipo di corrente elettrica caratterizzata da un flusso di elettroni di direzione costante nel tempo.
Cosa vuol dire DC 12 V?
Troverete spesso alimentatori, dove vi è stampato sull’involucro ad esempio 5V DC, questo significa che è un alimentatore a corrente continua, e di conseguenza anche la tensione sarà continua, quest’ultima con un valore di 5V. Sopra è rappresentato l’andamento di una tensione alternata a 12V, quindi una 12V AC.
Cosa vuol dire 12 VDC?
La sigla per indicare la corrente continua, presente in molti apparecchi e dispositivi, viene rappresentata con le lettere CC (continuous current) o DC (direct current), mentre simbolicamente essa può essere rappresentata da una linea retta continua seguita da tre linee più corte tratteggiate.
Can you get a shock from a 24V DC current?
You can get a shock from 24 vdc or 24vac under the right circumstances. You are very unlikely to get the 10 ma. of current that would cause death as your body resistance is fairly high even with perfect contact. By the way, a hot sweaty hand gives nearly as good a contact as can be had.
Should I use 24V DC or 24vac for relays and solenoids?
Using 24vdc to activate relays and solenoids can and will cause noise on your signal lines if not properly snubbed. Back emf induced when a dc voltage is removed from an inductor will cause havoc on your signal lines. If you cannot use diodes or some other voltage clipping device directly on the solenoid then go with 24vac.
Why is 24VDC so dangerous?
One important reason not mentioned so far for 24VDC is where simple circuits reach into the thousand feet or more to a contact and back (for a pull-cord switch for instance) the capacitive coupling of the field wiring would keep a small control relay energized regardless of the state of the distant contacts. So it can be a safety issue.
Why do we use 24VDC over transistor?
24VDC. Our control outputs are almost always transistor outputs. The reason is simple: Long life and high speed sensing and switching. to the constant zero-voltage crossover. be contact life on mechanical relays. A lot of small devices are Direct Current. One reason is safety.