If I am not concerned about supervision using EOLR's at the devices, can EOLR's be used in the panel and how?

I have a separate dedicated CAT5e wire run to each device (door monitors, motion detectors, smoke detectors and sirens).

I have a version 9.1 Ademco 20P that was purchased from Brinks Home Security. I know it is not recommended to not have EOLR'sat the devices, but since I do not have anything in a series, will the panel and devices work if the EOLR's are placed in the panel? My smoke detectors are the System Sensor 4 wire type. Will an End of Line Relay and an EOLR be required at each smoke detector or just one Relay and one EOLR in the panel?

If the EOLR's will work in the panel, but just not detect say shorts, then how do I wire the EOLR's in the panel?

Thanks for your help. 



1 comment
  • Hi Lee, 

    A few things: 

    1.) Honeywell does not recommend using Cat5 since it is shielded and can cause "noise" on the ECP (Enhanced Console Protocol) BUS. Keep an eye out for trouble down the road if you are using Cat5.

    2.) It is recommended to put the EOL (End of Line) Resistors at the device so no one can tamper with them and they provide the supervision you need per zone. Having said that , you can place them in the panel for all devices except those that are Normally Open ( that is closed for alarm event, such as smoke detectors or pull stations). To do this you would wire the hi side of the zone to the panel and the low side of the zone to one end of the resistor (does not matter which side of resistor) then the open end of the resistor would get connected to the control panel to the "low" screw of that particular zone. Chapter 9 of this article will be helpful.

    3.) You will need 1 EOL Relay AND 1 EOL Resistor per smoke zone. These need to be installed in the "field" at the smoke detector. 

    Let us know if you have any other questions. 


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