Hello I am interested to connect ventilators are descendant of the card
Hello I am interested to attach ventilators are descendant of the card
do i need a external power like 12 volt or 5 volt
can i connect the fan without a realys
if i have to connect with realay do i need a relays with 5 volt only
If the current of the fan is less than 100mA you do not need a relay.
Better to use external power supply. It is not a good idea to load the USB supply (+5V) of the card except if the load current is very low (some mA).
You can select the external power supply and the relay for any voltage up to 50V. (E.g. you can use 12V external power and 12V relays.) See the diagram on page 19 of the manual:
- Connect the external power minus (-) to GND of the card.
- Connect the external power plus (+) to CLAMP terminal of the card.
- Connect the relays between CLAMP terminal and digital outputs of the card.