Comfort  Automation/ Security System Forums Home
Home Search search Menu menu Not logged in - Login | Register

What is a "digital" input?
 Moderated by: slychiu
 New Topic   Reply   Printer Friendly 
 Rate Topic 
AuthorPost
 Posted: Friday May 13th, 2016 11:17 pm
   PM  Quote  Reply 
1st Post
martin.stevens
Member
 

Joined: Friday May 13th, 2016
Location:  
Posts: 2
Status: 
Offline

  back to top

Hi,
I am replacing my 15 year old Comfort system with a new one, and finding things are a bit different this time round. One question I can't find the answer to on the forums or the manuals concerns the digital flag on the zone types list. What does that mean? They're all digital aren't they? (apart from when you use the EOL resistors and then the analogue voltage is detected obviously).
What difference does it make if the input is defined as digital or not?
The comfigurator help just states that this defines the input as digital.
Sorry if this seems like a stupid question, but it's got be confused.



 Posted: Saturday May 14th, 2016 06:04 am
   PM  Quote  Reply 
2nd Post
slychiu
Administrator


Joined: Saturday Apr 29th, 2006
Location: Singapore
Posts: 5502
Status: 
Offline

  back to top

I am happy to hear you are replacing your old Comfort 1 after 15 years

A Digital input in Zone types means that it will only be On or Off, and never report Trouble. Non-digital zones with End of line resistors actually have 4 states; short circuit, closed, open, open circuit. Open circuit and closed circuit report as Zone Trouble

Digital zone types should not be used for alarm sensors, they can be used for non alarm inputs like switches



 Posted: Sunday May 15th, 2016 10:54 am
   PM  Quote  Reply 
3rd Post
martin.stevens
Member
 

Joined: Friday May 13th, 2016
Location:  
Posts: 2
Status: 
Offline

  back to top

Thanks for the help, that explains a lot.



 Posted: Sunday May 15th, 2016 11:46 am
   PM  Quote  Reply 
4th Post
Swiss-Toni
UCM Pi Users


Joined: Thursday Sep 15th, 2011
Location: Greater London, United Kingdom
Posts: 349
Status: 
Offline

  back to top

Their is no such thing as a stupid question...



 Posted: Monday Feb 12th, 2018 02:35 pm
   PM  Quote  Reply 
5th Post
timop001
Member
 

Joined: Friday Aug 8th, 2008
Location:  
Posts: 60
Status: 
Offline

  back to top

Ah.. one of my quires too - so DigitalNO is equivalent to ZoneType 8 (SwitchNO) where there are no EOL and the jumper is set accordingly?



 Posted: Monday Feb 12th, 2018 03:47 pm
   PM  Quote  Reply 
6th Post
slychiu
Administrator


Joined: Saturday Apr 29th, 2006
Location: Singapore
Posts: 5502
Status: 
Offline

  back to top

Yes Digital N/O is similar to Switch N/O
You can use both types without EOL resistors. With Digital, the position of the shunt does not affect it



 Current time is 07:51 am
Top




UltraBB 1.172 Copyright © 2007-2014 Data 1 Systems