Audio Switching Relay questions

[burningman]

Two questions:
1. CAE mentions the use of 'passive relays'.
       - Are passive relays non-latching (and active relays - latching)?
2. Does the nomenclature for relays also include optocouplers?
Thanks.

[Ripthorn]

1. I think active relays are latching, but not positive.

2. I think optocouplers are in a different category than relays, so they aren't included.

[R.G.]

1. CAE mentions the use of 'passive relays'. Are passive relays non-latching (and active relays - latching)?
I've never heard the terms used that way. I would guess that latching relays, needing no continuous coil power to stay in one or the other position, would be passive and non-latching, needing continuous power to stay in one position would be active, but that's just the way the terms strike me. I don't know what CAE (?) means by them. And in the tradition of our immortal president William Jefferson Clinton, "it all depends on what your definition of 'is' is". 

2. Does the nomenclature for relays also include optocouplers?
No.