Re: Power Distribution and Buses
![Post Post](./styles/prosilver/imageset/icon_post_target.gif)
Spaceman wrote:Spaceman wrote:That's a handy graphic to refer to. None of your instruments have trouble with that drop to like less than 8.5 volts? I'll have to dig through the Garmin encyclopedia later and see if there's a specified minimum.
I looked through the G3X manual but I couldn't find an actual min voltage spec. Just this note on page 27-1:14. TO MINIMIZE THE CHANCE OF THE SYSTEM RESETTING DURING ENGINE CRANKING, THE OPTIONAL REDUNDANT (DIODE OR'D) POWER INPUTS MAY BE CONNECTED TO AN AUXILIARY BATTERY (SUCH AS THE TCW TECHNOLOGIES INTEGRATED BACK-UP BATTERY SYSTEM) OR STABILIZED POWER INPUT (SUCH AS THE TCW TECHNOLOGIES INTELLIGENT POWER STABILIZER IPS-12V-8A) TO MAINTAIN THE NECESSARY LRU MINIMUM INPUT VOLTAGE. HAVING A STABLIZED SOURCE OF POWER DURING ENGINE CRANKING SHOULD ALLOW THE SYSTEM TO PROVIDE CONTINUOUS ENGINE INDICATING SYSTEM (EIS) OPERATION DURING ENGINE START AND MAINTAIN ANY DESIRED PRE-FLIGHT SYSTEM SETUP OR FLIGHT PLANNING THAT WAS ACCOMPLISHED PRIOR TO ENGINE START. VISIT
http://WWW.TCWTECH.COM
So this actually says to connect the optional power inputs to the power stabilzer... I'll have to figure out if what I was planning will work or maybe I need to change some stuff!!
you can either use the stabalizer or a battery the way the dioed or module works is basically like having a convergence of two inputs with one output with a check valve so if you think of it in terms of water. You have two independent sources of water but the one with the higher pressure, will feed the line and the check valve (The dioed) will prevent backflow to the lower pressure line. so if your voltage were to drop during cranking or become unstable the dip will be covered by the other source of water (Electricity). Thats why you want to connect it to the second input line so that the dioed cuircuit can prevent any electrical back flow without complicating the rest of the aircraft wiring.