How Can I Tell if My Qolsys IQ Hardwire 16-F Supports EOLR Learning?
You can tell if your Qolsys IQ Hardwire 16-F supports EOLR learning by checking the Serial Number (SN) for the unit on the back of its enclosure. If the fourth (4th) letter in the SN is the letter A, then the unit cannot support EOLR learning. It must be B or higher to support the feature.
Every Qolsys IQ Hardwire 16-F module must have an end of line resistor (EOLR) at each zone. This includes zones that have no sensors attached and are not actively being used. Originally, you could only use 4.7k resistors with the unit. But in December of 2019, Qolsys updated the device to support end of line resistor learning for resistor values ranging from 1k to 10k.
The best way to tell whether your Qolsys IQ Hardwire 16-F module is an updated unit that supports EOLR learning or an old unit that does not support the feature is to check its Serial Number. You can find the SN on the back of the device's plastic enclosure. The fourth (4th) letter represents the device's Revision. An IQ Hardwire 16-F must be running Revision B or higher to support EOLR learning. If the 4th letter in the SN is B or higher, then it can support EOLR learning. If it is the letter A, then it cannot support EOLR learning.
Below is the SN of a Qolsys IQ Hardwire 16-F that cannot support EOLR learning. Note that the 4th letter in the SN is the letter A. This indicates that the unit is Revision A, and it cannot support EOLR learning.
If you have a Qolsys IQ Hardwire 16-F that is Revision B or higher, then you will be able to switch between Resistor Modes on the unit. The two Resistor Modes for the Qolsys IQ Hardwire 16-F are UL Fire Mode and Legacy Mode. For more information on switching between Resistor Modes on a a compatible Qolsys IQ Hardwire 16-F that is Revision B or higher, please see this FAQ.
Also note that Zone 16 must always use a 4.7k resistor, regardless of which Resistor Mode the unit is running. This is a special zone on the module that is capable of supporting up to ten (10) 2-wire smoke detectors. All versions of the Qolsys IQ Hardwire 16-F, regardless of Revision, come with (16) 4.7k resistors so that you can properly configure the device.
Note: This Serial Number is not used for programming the Qolsys IQ Hardwire 16-F into the panel.
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