2k vs 2.2k Ohm EOL Resistors for Elk

[johngalt]

Greetings,
 
I have a number of door magnetic sensors with a built in EOL restore of 2k Ohms.  Is this close enough to the 2.2k Ohms that Elk utilizes to not have issues?
 
Thanks!

 

[sda]

I think it will work.  Page 9 of the install manual says the valid range of an EOL zone is 4.0v to 8.8v.  It also says an open zone should be 13.8v, but all mine are 13.6v max.  Anyway, a 2K resistor should get you about 6.5v.   There's no substitue for field experience.  Try it and see.  In ElkRP, "status" will show you the zone voltage values. 

 

[Del91574]

Should work but not a great idea in practice. Zone should set up but may also generate some trouble conditions reporting (low resistance is indicative of a high resistance short).
 
Normal EOLR's are +/- 5%
 
You're already at -10%

 

[johngalt]

Thanks.
 
I really like the idea of the GRI 2020T so I have a nice hidden door contact without the need for splicing or soldering.  And the fact they make them with built in EOLR is even better.  However, I don't believe they make them in 2.2k and just 2k.
 
So I was hoping I could get by.
 
Any other suggestions?

 

[rexwilson]

well, this is adding a bit more complexity, so I'm not sure this is ideal, but you could put another 0.2k resistor at the other end of the wire run (presumably at the panel, if you're home-running each wire).

 

[Del91574]

well, this is adding a bit more complexity, so I'm not sure this is ideal, but you could put another 0.2k resistor at the other end of the wire run (presumably at the panel, if you're home-running each wire).

Poor idea that ends up causing more trouble than it's worth
 
For the OP, if you drilled deep enough, it's easy enough to put a resistor in series on one leg and splice accordingly with a B connector and have a good connection. Soldering and the like isn't always necessary.

You can order any contact from the popular manufacturers with an integral resistor value of your choosing, even DEOLR's for some, however if you're going to be able to meet the minimum order size is another story.

 

[giansiro]

The best its to have R4 up.............