---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Tue 09/17/13: 12 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:22 AM - Re: Electrical System Review (user9253) 2. 07:16 AM - Inline connections needed? (with little space) (donjohnston) 3. 07:42 AM - Re: Inline connections needed? (with little space) (Bob McCallum) 4. 08:49 AM - Re: Electrical System Review (Dennis A Glaeser) 5. 09:16 AM - Re: Inline connections needed? (with little space) (donjohnston) 6. 10:10 AM - Re: Re: Inline connections needed? (with little space) (Bob McCallum) 7. 10:37 AM - Re: Re: Inline connections needed? (with little space) (R. curtis) 8. 12:34 PM - Re: Re: Inline connections needed? (with little space) (Ken) 9. 02:33 PM - Re: Inline connections needed? (with little space) (donjohnston) 10. 04:01 PM - Re: Re: Inline connections needed? (with little space) (Richard Girard) 11. 04:21 PM - Re: Inline connections needed? (with little space) (donjohnston) 12. 05:41 PM - Re: Location of Batteries and Master Relays (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 06:22:13 AM PST US Subject: AeroElectric-List: Re: Electrical System Review From: "user9253" > Of concern is that I don't see any reverse polarity protection from the Ground Power Jack. How would I achieve it with what I've got? The diode located under the GND PWR switch provides reverse polarity protection, as long as the polarity is not reversed after pulling in the Ground PWR contactor. Someone could trip over the jumper cables and pull them off the GND PWR Battery. Then they could put them back on backwards. But that is a remote possibility. If that is a crowbar-type over-voltage module, it is not wired correctly. Its upper wire needs to be removed from the GND PWR Plug and connected to the wire that goes between the diode and 2 amp circuit breaker. Then connect a 4 AWG cable between the GND PWR Plug and the Ground PWR contactor. Joe -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=408726#408726 ________________________________ Message 2 _____________________________________ Time: 07:16:29 AM PST US Subject: AeroElectric-List: Inline connections needed? (with little space) From: "donjohnston" I find myself stuck (again) and cant' decide on how to proceed. :( I'm working on wiring an overhead switch panel with about 10 switches. The space is rather tight. Because of that, I had to use some switches with really small bodies to fit in the area behind the panel. The only connection types are solder lugs. So now I've got to decide on how to wire them. I could solder the wires to the switches and run the wires directly to the mags, starter, master, etc. Or I could put in male/female faston connectors or knife connectors. I feel like hard wiring a switch directly to the controlled device is a bad idea since trying to solder a new switch in that position doesn't look like any fun. But what's the likelyhood of a switch failure? If it's not likely, then maybe it's not a bad idea. One of my thoughts during this build has been ease of service. But there's a point of diminishing returns that has to be considered. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=408732#408732 ________________________________ Message 3 _____________________________________ Time: 07:42:15 AM PST US From: Bob McCallum Subject: RE: AeroElectric-List: Inline connections needed? (with little space) One thought=3B Is the panel removable?? Or can it be made removable?? Solder all the switc h wires to the switches and bring them to a single DB series connector (15 ? 25? pin) and in the event of future switch replacement=2C pop out the pa nel=2C unplug it =2C make the replacements/repairs on the bench and re-inst all the panel. Bob McC > Subject: AeroElectric-List: Inline connections needed? (with little space ) > From: don@velocity-xl.com > Date: Tue=2C 17 Sep 2013 07:15:52 -0700 > To: aeroelectric-list@matronics.com > om> > > I find myself stuck (again) and cant' decide on how to proceed. :( > > I'm working on wiring an overhead switch panel with about 10 switches. Th e space is rather tight. Because of that=2C I had to use some switches with really small bodies to fit in the area behind the panel. The only connecti on types are solder lugs. > > So now I've got to decide on how to wire them. I could solder the wires t o the switches and run the wires directly to the mags=2C starter=2C master =2C etc. > > Or I could put in male/female faston connectors or knife connectors. > > I feel like hard wiring a switch directly to the controlled device is a b ad idea since trying to solder a new switch in that position doesn't look l ike any fun. > > But what's the likelyhood of a switch failure? If it's not likely=2C then maybe it's not a bad idea. One of my thoughts during this build has been e ase of service. But there's a point of diminishing returns that has to be c onsidered. > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=408732#408732 > > > > > > > =========== =========== =========== =========== > > > ________________________________ Message 4 _____________________________________ Time: 08:49:40 AM PST US From: Dennis A Glaeser Subject: AeroElectric-List: Re: Electrical System Review Am I looking at it wrong, or is the battery symbol backwards in that diagra m? It looks like the + side is connected to the ground bus ... Dennis Glaeser Nothing in this message is intended to constitute an electronic signature u nless a specific statement to the contrary is included in this message. Confidentiality Note: This message is intended only for the person or entit y to which it is addressed. It may contain confidential and/or privileged m aterial. Any review, transmission, dissemination or other use, or taking of any action in reliance upon this message by persons or entities other than the intended recipient is prohibited and may be unlawful. If you received this message in error, please contact the sender and delete it from your co mputer. ________________________________ Message 5 _____________________________________ Time: 09:16:25 AM PST US Subject: AeroElectric-List: Re: Inline connections needed? (with little space) From: "donjohnston" Excellent idea! It is removable. http://www.velocity-xl.com/blog/wp-content/uploads/2013/09/2013-09-02-IMG_20130902_153556_104a.jpg But I would need a DB-25 and I'm not certain that will fit. I will check that out. Thanks! Read this topic online here: http://forums.matronics.com/viewtopic.php?p=408747#408747 ________________________________ Message 6 _____________________________________ Time: 10:10:51 AM PST US From: Bob McCallum Subject: RE: AeroElectric-List: Re: Inline connections needed? (with little space) Don't forget Bob's idea for making DB series connectors smaller if space is that much of an issue. This idea applies to the 25 pin as well as the 9. T here is also the high density series which puts more pins in a smaller body size. http://www.aeroelectric.com/articles/macservo/macservo.html Bob McC > Subject: AeroElectric-List: Re: Inline connections needed? (with little s pace) > From: don@velocity-xl.com > Date: Tue=2C 17 Sep 2013 09:15:58 -0700 > To: aeroelectric-list@matronics.com > om> > > Excellent idea! > > It is removable. > > http://www.velocity-xl.com/blog/wp-content/uploads/2013/09/2013-09-02-IMG _20130902_153556_104a.jpg > > But I would need a DB-25 and I'm not certain that will fit. I will check that out. > > Thanks! > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=408747#408747 > > > > > > > =========== =========== =========== =========== > > > ________________________________ Message 7 _____________________________________ Time: 10:37:31 AM PST US From: "R. curtis" Subject: Re: AeroElectric-List: Re: Inline connections needed? (with little space) > But I would need a DB-25 and I'm not certain that will fit. I will check > that out. There is always the option of wiring direct initially, and then if you have a failure later on you can cut and splice. Roger -- Do you have a slow PC? Try a Free scan http://www.spamfighter.com/SLOW-PCfighter?cid=sigen ________________________________ Message 8 _____________________________________ Time: 12:34:40 PM PST US From: Ken Subject: Re: AeroElectric-List: Re: Inline connections needed? (with little space) DB connectors aren't really intended for significant voltage. How high are the voltage peaks on Mag P-leads? Might be a concern for small switches as well or is it not an issue? Ken On 17/09/2013 1:10 PM, Bob McCallum wrote: > *Don't forget Bob's idea for making DB series connectors smaller if > space is that much of an issue. This idea applies to the 25 pin as well > as the 9. There is also the high density series which puts more pins in > a smaller body size. > > http://www.aeroelectric.com/articles/macservo/macservo.html > > Bob McC > * > > > Subject: AeroElectric-List: Re: Inline connections needed? (with > little space) > > From: don@velocity-xl.com > > Date: Tue, 17 Sep 2013 09:15:58 -0700 > > To: aeroelectric-list@matronics.com > > > > > > > Excellent idea! > > > > It is removable. > > > > > http://www.velocity-xl.com/blog/wp-content/uploads/2013/09/2013-09-02-IMG_20130902_153556_104a.jpg > > > > But I would need a DB-25 and I'm not certain that will fit. I will > check that out. > > > > Thanks! > > > > > > > > > > Read this topic online here: > > > > http://forums.matronics.com/viewtopic.php?p=408747#408747 > > > > > > > > > &g========================> > > > > > > * > > > * > ________________________________ Message 9 _____________________________________ Time: 02:33:09 PM PST US Subject: AeroElectric-List: Re: Inline connections needed? (with little space) From: "donjohnston" klehman(at)albedo.net wrote: > DB connectors aren't really intended for significant voltage. How high > are the voltage peaks on Mag P-leads? Might be a concern for small > switches as well or is it not an issue? > Ken Good question. I'll have to look and see what current/voltage spec for the mags are. Note 3 in the wiring diagram appendix says to use 20 or 22AWG wiring for the mags. I'm inferring that to mean relatively low current. But I'll verify that nonetheless. Thanks, Don Read this topic online here: http://forums.matronics.com/viewtopic.php?p=408768#408768 ________________________________ Message 10 ____________________________________ Time: 04:01:16 PM PST US Subject: Re: AeroElectric-List: Re: Inline connections needed? (with little space) From: Richard Girard Or you could use the machined pins for the DB 25 and mate them directly with some shrink tubing over them and go without using the body of the connector. Rick Girard On Tue, Sep 17, 2013 at 12:10 PM, Bob McCallum < robert.mccallum2@sympatico.ca> wrote: > *Don't forget Bob's idea for making DB series connectors smaller if space > is that much of an issue. This idea applies to the 25 pin as well as the 9. > There is also the high density series which puts more pins in a smaller > body size. > > http://www.aeroelectric.com/articles/macservo/macservo.html > > Bob McC > * > > > Subject: AeroElectric-List: Re: Inline connections needed? (with little > space) > > From: don@velocity-xl.com > > Date: Tue, 17 Sep 2013 09:15:58 -0700 > > To: aeroelectric-list@matronics.com > > > > don@velocity-xl.com> > > > > Excellent idea! > > > > It is removable. > > > > > http://www.velocity-xl.com/blog/wp-content/uploads/2013/09/2013-09-02-IMG_20130902_153556_104a.jpg > > > > But I would need a DB-25 and I'm not certain that will fit. I will check > that out. > > > > Thanks! > > > > > > > > > > Read this topic online here: > > > > http://forums.matronics.com/viewtopic.php?p=408747#408747 > > > > > > > > > &g========================**> > > > > > > * > > * > > -- Zulu Delta Mk IIIC Thanks, Homer GBYM It isn't necessary to have relatives in Kansas City in order to be unhappy. - Groucho Marx ________________________________ Message 11 ____________________________________ Time: 04:21:28 PM PST US Subject: AeroElectric-List: Re: Inline connections needed? (with little space) From: "donjohnston" rickofudall wrote: > Or you could use the machined pins for the DB 25 and mate them directly with some shrink tubing over them and go without using the body of the connector. > > Rick Girard > I have room for a DB-25 behind the switches. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=408771#408771 ________________________________ Message 12 ____________________________________ Time: 05:41:16 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Location of Batteries and Master Relays At 06:04 PM 9/16/2013, you wrote: >Bob, > >I am planning on using the Z14 wiring for the FADEC electronic >ignition. I am going to use two Odyssey PC680 batteries to be >located under the pilot/co-pilot seats. There is plenty of room for >upright installation with ample room to also install the master >relays, crossover relay, and starter contactor and voltage >regulators as well. I will also have the wing leveler autopilot >servo in the same area. This is essentially dead space that is not >usable for storage. Suggest the cross tie contactor be on the fire wall. "All roads used to lead to Rome", all systems lead to the cross-feed contactor . . . good place to tie alternator and bus feeders. > >The question is do you see any issues with having all the relays, >contactors, and voltage regulators located under the seats in the >same area? Past experience with batteries have proven keeping them >inside greatly extends their life but not sure if there are other >issues I am not considering. There is plenty of room, lots more >than behind the firewall and more accessible too. Under the seats is fine as far as I can see . . . others may have some caveats to offer. If the batteries are there, then the battery busses could be there too since you are obviously planning for handy access. 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