Can The Qolsys IQ Hardwire 16-F Support End Of Line Resistor Learning?

Yes, the Qolsys IQ Hardwire 16-F supports end of line resistor learning if the module was built in week 40 of 2019 or later. Earlier versions of the module are required to use 4.7k Ohm resistors. IQ Hardwire 16-F modules that support EOLR learning can use resistor values from 1k to 10k Ohms.

All versions of the Qolsys IQ Hardwire 16-F require an end of line resistor at each zone. This is true even if the zone isn't being used. Originally, the module could only support 4.7k Ohm resistors, which are color-coded Yellow-Violet-Black-Brown-Brown. If your Qolsys IQ Hardwire 16-F was built before week 40 of 2019, then you will need to use 4.7k Ohm resistors at each zone. In other words, Qolsys IQ Hardwire 16-F modules built before week 40 of 2019 do not support EOLR learning. You can identify a Qolsys IQ Hardwire 16-F that supports EOLR learning by checking its Serial Number (SN). More information is available here.

But in week 40 of 2019, Qolsys made a hardware change so that all future versions of the IQ Hardwire 16-F supported end of line resistor learning for resistor values ranging from 1k to 10k ohms. Although the module supports EOLR learning, you must still use exclusively 4.7k resistors with the 16-F to make the module compliant with UL fire standards. Every version of the Qolsys IQ Hardwire 16-F comes with (16) 4.7k resistors for this purpose, regardless of when the module was manufactured.

When setting up the Qolsys IQ Hardwire 16-F, you will need to decide whether it is going to use Legacy Mode or UL Fire Mode. Legacy Mode means that at least one of the 16 zones will utilize EOLR learning so that an end of line resistor with a value from 1k to 10k Ohms (other than 4.7k) is used with that zone. UL Fire Mode means that all 16 of the Qolsys IQ Hardwire 16-F zones are using 4.7k resistors. Remember, all zones used with the Qolsys IQ Hardwire 16-F must have a resistor, even if the zone input is not being actively used.

Note: In UL Fire Mode, the 16-F Processor LED light will blink quickly (8 times per second). In Legacy Mode, the 16-F Processor LED light will blink slowly (1 time per second). For information on switching between modes, please review this FAQ.

It is required that you have all the resistors for the Qolsys IQ Hardwire 16-F properly wired before attempting to enroll the module to the panel as a hardwire translator. Additionally, if you are planning to use one or more 2-wire smoke detectors with Zone 16 on the module, then those should be fully wired as well before enrolling. This allows the module to properly recognize that Zone 16 is a Normally Open (NO) zone for 2-wire smoke detectors. For more information on setting up 2-wire smoke detectors for use with the Qolsys IQ Hardwire 16-F, please review this helpful FAQ. It is always recommended that you clear the memory on the Qolsys IQ Hardwire 16-F prior to initial setup, or when the end of line resistor mode is being changed.