Dave from Electrical Engineering has a short and sweet answer:
http://en.allexperts.com/q/Electrical-Engineering-1356/Meanings-Dry-Contact.htm”>Dave from Electrical Engineering:
A dry contact is a set of 2 switch contacts, like a set of contacts from a relay or from a toggle switch, etc, that has both terminals available and neither contact is connected to power or anything else. (“Dry” = no “juice”) The contacts may be NO, normally open (also called form A), or NC, normally closed (also called form B). Form C would be a SPDT (single pole double throw) with 3 connections.
So, you can hook up the contacts to anything you want, not worrying if they are already connected to power or any other circuit.
Hope this helps!
Dave
Dave from Electrical Engineering has a short and sweet answer:
http://en.allexperts.com/q/Electrical-Engineering-1356/Meanings-Dry-Contact.htm”>Dave from Electrical Engineering:
A dry contact is a set of 2 switch contacts, like a set of contacts from a relay or from a toggle switch, etc, that has both terminals available and neither contact is connected to power or anything else. (“Dry” = no “juice”) The contacts may be NO, normally open (also called form A), or NC, normally closed (also called form B). Form C would be a SPDT (single pole double throw) with 3 connections.
So, you can hook up the contacts to anything you want, not worrying if they are already connected to power or any other circuit.
Hope this helps!
Dave