---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 04/13/26: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:32 AM - Re: Z12 Review for my Experimental Robin DR250 (velletazjp) ________________________________ Message 1 _____________________________________ Time: 08:32:32 AM PST US Subject: AeroElectric-List: Re: Z12 Review for my Experimental Robin DR250 From: "velletazjp" Thank you all for the very useful feedback. I have updated the wiring accordingly and I am trying to stay as close as possible to Bob Nuckolls Z-12 philosophy. My design intent for the endurance bus is the following: in normal operation, all equipment is powered from the main bus in case of loss of the main alternator, I want to be able to continue the flight on the endurance bus with the standby alternator in case I need to shed the main bus, I want the endurance bus to keep only the truly necessary loads for safe continuation and landing So I understand the concern about having too much Garmin equipment on the endurance bus, especially in a smoke-in-cockpit scenario. That is a very fair point. My goal is not to make the E-Bus a second main bus, but to preserve the minimum capability needed to keep control, navigate, communicate, and get on the ground. Regarding the suggestion to use Hall effect sensors instead of shunts, I may have misunderstood the intent of that comment. My hesitation is that the AMPLOC KEY100 have an official end-of-life notice with no recommended replacement listed by the manufacturer. Since the G3X can also work with a conventional shunt, I am not sure a Hall sensor is the best path for a new installation at this point. I also have a regulator/alternator integration question: My main alternator is a Plane Power ALY-8520LS, and I plan to use a B&C LR3E regulator. >From what I understand: the LR3 field output should go to the alternator F1 lead F2 on some Plane Power/Hartzell units is either internally grounded or intended to be grounded externally, depending on configuration I do not see a clear need for the AUX terminal when using the LR3E as a basic external regulator Am I understanding this correctly? More specifically: Is the Plane Power ALY-8520LS considered fully compatible with the B&C LR3E? Should I connect only F1 to the LR3E field output? Should F2 be grounded, or is it already internally grounded on this alternator? Should the AUX terminal remain unused in this installation? My objective is to keep the architecture simple, robust, and as faithful as practical to the Z-12 concept, while still matching the Garmin/G3X installation requirements. Thank you again for your time and for reviewing the updated diagram. -------- 2020 contribution paid Read this topic online here: http://forums.matronics.com/viewtopic.php?p=517092#517092 Attachments: http://forums.matronics.com//files/capture_decran_2026_04_13_a_171048_157.jpg http://forums.matronics.com//files/img_1813_1_198.jpg http://forums.matronics.com//files/img_1812_1_430.jpg http://forums.matronics.com//files/f_pezz_electrical_diagram_dual_alternators_single_battery_z12_g3x_integration_model_2_523.pdf ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.