Partner acs contact closure.... No adjunct

[mg86]

Hey everyone. I just completed a nice little access control job and now the customer would like it tied into their phone system. I have a door phone mounted and everything programmed for the door phone extensions and contact closure buttons. The door phone works like a charm. Unfortunately the adjunct is apparently a rare unicorn now. So, I ordered a Viking LDB-1. I have figured out which pins close when the contact closure button is pressed.
My question is does anyone have experience of how I should wore up the ldb-1? I'm assuming current does not need to be feeding through that contact closure for fear of damaging the phone system.
Has anyone used this set up?
Thanks for any help!

 

[mg86]

Has anyone ever used this set up or have another idea?

 

[mg86]

Bump

 

[mforrence]

How is door phone interfaced to phone system? Just put a DTMF-activated contact closure, such as Viking RC2A in line to release door. The loop current detector wouldn't be my first choice...

 

[mg86]

The door phone runs into an extension. I talked to Viking this morning. They are sending me a SRC-1.
They said to wire it in between the door phone and the pbx and that would allow the 3 extensions in the door phone group to all work the relay. No Ned for the onboard contact closure.