Understanding Nominal and Operating Supply voltages

[RonaldJJames]

I've bought a marine navigation device (a Raymarine C90W display) that would normally be operated in a boat and connected to the 12V DC boats supply. The device has a "play at home" mode to learn its features. So I'm looking for a means of powering the device at home. I don't want to spend a lot of money, since I'll only need the power supply during the upcoming winter season.

The device has a "Nominal Supply voltage of 12/24V DV" and an "Operating Voltage Range of 10.7 to 32 V DC".

I don't really understand these terms, but it occurs to me that the AC adapter that's running the laptop I'm using right now is 20V, 90 W. The wattage is more that I need. So can I connect this adapter to the display?

Any other suggestions for a cheap power source would be appreciated.

Many thanks

Ron James

 

[hameeds01]

does it has a voltage selector switch 12v/24v ??
if it has no selector switch then its an Auto supply u can run it via ur 20V laptop supply even if the watts of the supply is more,

 

[threephase]

Operating voltage of 10.7V to 32V sounds like it's designed to be universal for boats that are either 12V or 24V (hence the nominal rating) without having to have a voltage selector. I'm sure it will be fine powered from your 20V supply.

3phase

 

[karesz]

Hi ppls,
Remember: polarity of pwr connector pls?
K.