question about relay terminology.

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mkruger

Well-known member
Joined
Jul 25, 2004
Messages
149
Location
Southampton, New York
I'm looking at ordering some power wupply relays but I have a choice of different terminal/swiching options.

N/O
N/C
C/O

What does this mean? Thanks

-mike
 
The first two say what the contacts do when there is no power to the relay coil:

N/O = Normally Open
N/C = Normally Closed

C/O = I have no idea what this is. Show me a data-sheet.
 

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