I've used the Wheelock DCI-24-24 dry contact interface for installations that needed a 24 volt bell to ring with a contact closure. I've used these for years, but it was years ago. I find that they've been discontinued for a while now. For those repair/replacement calls, I find one on ebay when I need it.

But what do you use today on an install with a 24 volt signal requirement? I'm going to be replacing a system that has a few of these bells and would like to freshen up the DCI connections. Would rather not have to change out bells.

Thanks.
Jim