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APX New Version of O3 HHCH?

james_garner

Member
Premium Subscriber
Joined
Jan 22, 2005
Messages
5
Location
Austin, TX
I have several O3 HHCH units and the latest one I bought has siren control buttons.
Do I need a SLIM to make it work with an APX 7500 or will it work on its own like a O9 control head?

Thanks and 73,

N5VV
 

Mr_Boh

Member
Joined
Oct 10, 2016
Messages
359
Location
The Land of Pleasant Living
There are a couple ways to do lights and sirens, with varying degrees of difficulty and reliability. Someone on eBay has the Whelen siren that directly interfaces for sale, but I have heard mixed reviews of the reliability. You could also do a relay box and trigger them that way.

The only difference between the two O3 is the keypad itself, and you can buy that on it’s own.
 

sfd119

Member
Joined
Jul 18, 2009
Messages
1,713
There are a couple ways to do lights and sirens, with varying degrees of difficulty and reliability. Someone on eBay has the Whelen siren that directly interfaces for sale, but I have heard mixed reviews of the reliability. You could also do a relay box and trigger them that way.

The only difference between the two O3 is the keypad itself, and you can buy that on it’s own.
Got a link?
 
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