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Author Topic: jnior digital input
Aleksandar Obradovic
Expert Film Handler

Posts: 125
From: Belgrade, Serbia
Registered: Oct 2012


 - posted 02-11-2013 01:14 AM      Profile for Aleksandar Obradovic   Email Aleksandar Obradovic   Send New Private Message       Edit/Delete Post 
Hi guys,

Can someone tell me can i use dry contacts from my fire alarm system to trigger jnior digital input (no voltage is present on the line)?

BR Alexander

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Marco Giustini
Film God

Posts: 2565
From: Reading, UK
Registered: Nov 2007


 - posted 02-11-2013 01:23 PM      Profile for Marco Giustini   Email Marco Giustini   Send New Private Message       Edit/Delete Post 
get the + from the power supply of the Jnior itself, route it through your fire alarm relais and then into the Digital Input.

Make sure your fire relais can cope with the voltage (9V? can't remember).

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Aleksandar Obradovic
Expert Film Handler

Posts: 125
From: Belgrade, Serbia
Registered: Oct 2012


 - posted 02-14-2013 02:15 PM      Profile for Aleksandar Obradovic   Email Aleksandar Obradovic   Send New Private Message       Edit/Delete Post 
Relays at fire protection system module are electrically separated (it is Notifier M 701 module) so there is no problem to use + from jnior power supply. I just didn't knew if it is possible to feed 12 VAC voltage to the DIN of jnior (i didn't found it in jnior documentation).

Tnx for your help Macro

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Marco Giustini
Film God

Posts: 2565
From: Reading, UK
Registered: Nov 2007


 - posted 02-14-2013 02:23 PM      Profile for Marco Giustini   Email Marco Giustini   Send New Private Message       Edit/Delete Post 
the manual says 0-30V, with 2-30V considered "high".

(getting started manual, Hardware Specifications)

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Aleksandar Obradovic
Expert Film Handler

Posts: 125
From: Belgrade, Serbia
Registered: Oct 2012


 - posted 02-14-2013 03:48 PM      Profile for Aleksandar Obradovic   Email Aleksandar Obradovic   Send New Private Message       Edit/Delete Post 
Tnx for info Marco.
I tried with dry contacts but without success. Tomorrow in the morning i will try what you said and give you feedback here if it was successful so others can see this too.

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Dave Macaulay
Film God

Posts: 2168
From: Toronto, Canada
Registered: Apr 2001


 - posted 02-15-2013 03:12 PM      Profile for Dave Macaulay   Email Dave Macaulay   Send New Private Message       Edit/Delete Post 
The Jnior power supply is 12VDC, but the inputs only work with one voltage polarity. The DC connector on the Jnior has extra terminals to connect your new wires to. Connect the "-" power directly to the lower of the two Jnior input channel terminals. Connect "+" to your normally open/close for alarm fire relay contact and bring back the other relay contact to the upper terminal on the Jnior input channel.
You can test polarity to be sure, when you activate an input its LED lights up.

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Aleksandar Obradovic
Expert Film Handler

Posts: 125
From: Belgrade, Serbia
Registered: Oct 2012


 - posted 02-21-2013 11:57 AM      Profile for Aleksandar Obradovic   Email Aleksandar Obradovic   Send New Private Message       Edit/Delete Post 
I solved this with one relay and 1k resistor to accommodate current to GPI of Doremi. It works fine and it is much faster then solution with jnior.

tnx to all of you guys

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