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Re: Auto reverse area ¡°dead¡±
Charles
There really isn't an answer - if you've truly isolated both rails of the indicated track, and each rail is only wired to one of the two outputs of the PSX-AR, and the PSX-AR is indeed receiving input power from the booster, then either one rail isn't, in fact, wired to the PSX-AR or?the other rail isn't or the PSX-AR isn't doing it's job. So, tell us how you tested the PSX-AR, and how you've verified that the PSX-AR has input power.? There has to be something wrong with the testing, or the test interpretation. Blair |
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Auto reverse area ¡°dead¡±
In the photo albums, the first photo in ¡°Charles layout design¡± shows the 3 isolation locations on the peninsula for auto rev. #2. I¡¯ve removed all electricity from this area except the output side of a psx-ar and there¡¯s no power in the isolated area. Have I missed something?
The NCE doesn¡¯t short out and I¡¯ve proven the psx-ar to ok. |
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Re: Block detection, Frog juicers and Circuit Breakers.
Ken, If i am understanding what you wrote I should be OK.? Currently my PSX and AR Boards are daisy chained directly from my Command station al all centrally located. From each PSX or AR (only 2) board I ran a bus to each power district. So as long as my BD's do not cross the power district all should be OK. am I understanding? That would be a relief to me. Thanks Perry
On Friday, October 8, 2021, 09:20:22 AM CDT, Ken Harstine <kharstin@...> wrote:
Your frogs and short circuit protection devices should be located in the wiring between your track detectors and you DCC track power.? In this way they do not see the supply current.? Not detecting on the frogs will not adversely effect your signals because the track section not detected is minuscule. Ken Harstine 413-250-8298 |
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Re: Block detection, Frog juicers and Circuit Breakers.
Your frogs and short circuit protection devices should be located in the wiring between your track detectors and you DCC track power. In this way they do not see the supply current. Not detecting on the frogs will not adversely effect your signals because the track section not detected is minuscule.
Ken Harstine 413-250-8298 |
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Re: Block detection, Frog juicers and Circuit Breakers.
Hi Perry,
I'm glad to know people are reading my column.? Sorry if the September column ruined your day. As far as using the Atlas signal system, I am not an expert on it's use.? I just read up on it for another reader.? (See the Nov. 2021 Model Railroader for my latest column.)? As long as you are not using DCC track power after a block detector, I think you will be able to use it. As far as block detection and using things like the PSX, PSX-AR, and Frog Juicers (I think that is what you meant by Frog-AR), ANY electronic device placed after a block detector will likely cause it to report a track occupied signal. Now what?? If you want to use Frog Juicers, you can success by placing the block detection on the output (frog) wire of the Frog Juicer.? If you want to use the PSX and PSX-AR's, you will need to put the block detector after it. Some time in 2022 I will probably be writing about using a block detector and feeders.? ALL feeders to a given block must be tied together - to a sub bus or whatever - and then that sub bus must be attached to the output of the block detector.? A block detector cannot be tied to a single feeder of a multi feeder section of track and be expected to work if the other feeders bypass the block detector. Allan Gartner Wiring for DCC |
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Block detection, Frog juicers and Circuit Breakers.
I just read Allan's column in MRR sept. I am gald I did. What? blow to my plans. Now I have a cunundrum. I have laid all my track.
I am using DCC specialties PSX, PSX-AR and Frog -ARs. I also planned to use the Atlas signal system. I have actually purchased all the parts. I set up a test trac and and tested the system and liked it for what I need. But Now am reading I wont be able to use it as planned. My test track did not have any of the above mentioned boards or devices. so I had no problems. In Allan's column he mentions how these boards will use current that willand cause block detection to be detected. Did I understand that correctly? So basically my plan to use block detection with the Atlas system has to be scrapped and I need to find another type of detection. I can wire the Frod to the tortoise but I am not sure what to do about short curcuit protection? Perry |
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Re: NCE auto switch Jim Exler Schematic # NCEDCC4 Question
¿ªÔÆÌåÓýDave,?That¡¯s correct, but only if the programming track is isolated from the rest of the layout ¡ª which is the answer to the question you asked.? Bill D N&W Steam Only On Oct 6, 2021, at 10:40 PM, Dave Hamernik <jibebuoy13@...> wrote:
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Re: NCE auto switch Jim Exler Schematic # NCEDCC4 Question
John Bauchiero
¿ªÔÆÌåÓýDave,?The isolation track is to protect the main track from being powered by the program track, IF the loco being programmed wanders toward the main and shorts across the track boundary insulators. Some locos move substantially when programmed.? John
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Re: NCE auto switch Jim Exler Schematic # NCEDCC4 Question
Hi Bill. But I thought that was the purpose of the auto switch. It senses that you are programming so it de-energizes the main and only programs the program track. If I had 3 locos on the main it shouldn't matter since the autoswitch de-energized the main. Right? ()
Btw, if anyone is wondering where the one line diagram is that I am referring to, it is in part 2 of Track Wiring on Alan's web page ( ).?The one lines are at the very, very end. I am looking at schematic ncedcc4.? Thank you.? -- Dave Portland, OR |
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Re: NCE auto switch Jim Exler Schematic # NCEDCC4 Question
¿ªÔÆÌåÓýDave,?As I understand it, you don¡¯t need an isolated program track IF the only Loco on your layout is the one you want to program. ?Without isolation every Loco will be programmed. ?By isolating the program track, the programming signals are sent only to the Loco on the programming track. ?And by by-passing the ¡°programming-out¡± terminals on the auto-switch, you can use the program track to run trains when not in program mode.? Bill D N&W Steam Only On Oct 6, 2021, at 7:43 PM, Dave Hamernik <jibebuoy13@...> wrote:
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NCE auto switch Jim Exler Schematic # NCEDCC4 Question
Hi - On this one-line diagram Jim shows the autoswitch wired to a programming track with an isolation track. I understand that the purpose of the isolation track is to keep you from accidentally driving your loco on to the Layout which would cause issues. Here's my question: isn't the isolation track redundant in this case? The purpose of the auto switch is to detect programming data being sent from the power cab and subsequently killing power to the main. If there is no power to the main then why do you need an isolation track?
Im sure im missing something just like to know what it is.? Thanks.? -- Dave Portland, OR |
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Photo Notifications
#photo-notice
[email protected] Notification
Tom Grassi <trgrassijr@...> added the album BD20 Reverse Loop: Need help with wiring a Reverse Loop for block detection The following photos have been uploaded to the BD20 Reverse Loop album of the [email protected] group. By: Tom Grassi <trgrassijr@...> |
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Added Folder /BD20 Reverse Loop
#file-notice
[email protected] Notification
Tom Grassi <trgrassijr@...> added folder /BD20 Reverse Loop |
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Re: BD20 and Reverse Loop
Don Sorry the image disappeared I will place the image in the upload section and post the link The photo is here [email protected] | Album Can you tell me if I have this correct? When I train is in block 2 near the green mark I have no block detection there only when close to the BD20 another feeder and loop that thru same BD20 or another BD20 and feeder this loop section is little over 6 six feet long Any ideas?? Thanks Tom Grassi trgrassijr@... |
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Re: BD20 and Reverse Loop
Tom, the AR controller still needs to be wired from the main DCC bus and all track feeders inside the AR section(s). Each new BD20 needs to monitor all track current to one of the rails Inside the new signal block. Cut a gap in the rail as desired to create the new signal blocks inside the AR section. Pass the track feeders for the isolated rail of each new signal block through a BD20, and back to, or fed from the output of the existing AR controller. The fact that the DCC signal through the BD20 flips phasing/polarity of track power from the AR controller makes no difference.
DonV |
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BD20 and Reverse Loop
Hello All
I have a reverse Loop and I setup two blocks in the Loop for signaling? All trains can run in either direction thru the loop with now problem. Today on the two feeders I connected my NCE BD20's to my NCE AIU-01 I was trying to setup the turnout also with another pair of BD20's? So when I did that I put a cut in one of the rails and ran a feeder down thru the BD20 and connected to my DCC Track Bus Line. When I put the cut in the rail I had to add an additional pair of feeders just pass the cut so that the rails would have current. ? That all worked? until today.? When I connected the BD20 to the AIU-01 I lost power to the Loop only has 2.3 volts. after some time I decided to remove the extra feeders from the equation? ?So now I only have two wires for each feeder to the BD20. Still no power? So I removed the BD20's from the AIU-01 and still had no power? I then Added back the extra feeders to the terminal block that connects to the AR Device? A Dual Frog Juicer by Tam Valley So the question I have is How to you wire a reverse loop so I can have block detection/ Hope someone has a diagram? or suggestions Thank you Tom -- Tom Grassi trgrassijr@... |
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Re: Seeking reversing section input
¿ªÔÆÌåÓý
A final thanks to everyone that has provided feedback.? It is much appreciated and at this point I feel I have sufficient information to move forward.
Nick
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Charles Cauble
Ken Harstine
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