Info on wiring Viessman coach lighting decoder 5077

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Info on wiring Viessman coach lighting decoder 5077

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fabstar68		#1 Posted : 20 August 2024 19:30:02(UTC) Retweet
Joined: 14/12/2023(UTC) Posts: 60 Location: Milan		hi all, i got myself a led stripe with integrated decoder for coach lightnimg, Viessmann 5077. Also, i got viessmann 5056 red rear lights for the last coach of my train. i am having a hard time understanding how to wire those rear lights. the 5077 instructions say that the rear led lights can be wired in two ways, but to me neither of them is clear enough. the 5056 instructions tell to connect the blu cable to the internal decoder supply, and the black cable with the provided 6k8 resistor and then to the light output of the decoder. is this last the good way ? i am not cutting the stripe. so i have to connect the blu cable to the "power supply contact" of the stripe (either them will be ok ? they are the same, in a marklin ac c-track layout ? i am connecting the "power supply contact" to the red ac current via a pickup shoe, and the "power supply contact - right track connection" to the brown ac current via wheel contacts) . and the black cable, with the resistor, to the "led-cathode" or "led-anode" of the stripe end ? thanks for any hint. Fab

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marklinist5999		#2 Posted : 21 August 2024 12:40:29(UTC) Retweet
Joined: 10/02/2021(UTC) Posts: 3,889 Location: Michigan, Troy		Hi Fab. Can you test the polarity before you install and solder or connect with the tail lights by touching the wires from both to the rail and center track studs? Maybe use temporary alligator clips.


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JohnjeanB		#3 Posted : 21 August 2024 13:23:52(UTC) Retweet
Joined: 04/02/2011(UTC) Posts: 3,562 Location: Paris, France		Originally Posted by: fabstar68 hi all, i got myself a led stripe with integrated decoder for coach lightnimg, Viessmann 5077. Also, i got viessmann 5056 red rear lights for the last coach of my train. i am having a hard time understanding how to wire those rear lights. the 5077 instructions say that the rear led lights can be wired in two ways, but to me neither of them is clear enough. the 5056 instructions tell to connect the blu cable to the internal decoder supply, and the black cable with the provided 6k8 resistor and then to the light output of the decoder. is this last the good way ? i am not cutting the stripe. so i have to connect the blu cable to the "power supply contact" of the stripe (either them will be ok ? they are the same, in a marklin ac c-track layout ? i am connecting the "power supply contact" to the red ac current via a pickup shoe, and the "power supply contact - right track connection" to the brown ac current via wheel contacts) . and the black cable, with the resistor, to the "led-cathode" or "led-anode" of the stripe end ? thanks for any hint. Fab Hi Fab So the 5077 is a decoder-fitted lighting bar and is connected this way (circled red, see below) The 5056 is a set including: - 2 LEDs - 2 resistors - one diode To provide flicker-free operation, it is best to connect the 2 diodes and resistor to a DC source (from digital- fully-rectified source To this end, I would - connect the diodes in series (identify the anode with a multi-meter or a simple battery in this case with one of the resistors in series. This means connecting the anode of a LED with the cathode of the other LED - at each cut-out, you have solding pads marked + and - - connect the anode side of the 2 LEDs to the + and the cathode to one of the provided resistors and the other resistor extremity to the - pad. See the wiring below. It is simple but with a drawback: when you switch off the light, the red LEDs will be switched off. Cheers Jean
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fabstar68		#4 Posted : 23 August 2024 12:07:57(UTC) Retweet
Joined: 14/12/2023(UTC) Posts: 60 Location: Milan		hi all, and thanks for your kind reply. I am not sure to understand why Jean you are proposing to connect the 2 red led in series. The 5056 instructions show only parallel connections, and they say that they can be soldered directly to the 5077 pads without the need of using neither the resistor or the diode. i tried to connect one red led to the pads (directly), and it's ok, brigthness is right. i haven't tried (yet) to connect 2 red leds in parallel. are you suggesting that parallel connection will not work, and that i should use the serial connection with one resistor that you are proposing ? thanks

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JohnjeanB		#5 Posted : 24 August 2024 00:39:42(UTC) Retweet
Joined: 04/02/2011(UTC) Posts: 3,562 Location: Paris, France		Hi Fab Why connect the 2 red LEDs in series? Because the wiring is simpler and the same current is used to lit both LEDs Why insert a resistor? Because Viessmann, in its manual says so. Look page 5 in the manual in the blue frame "Please note: LEDs must always be wired via a series resistor! Please pay attention to the correct polarity of the LEDs! Cheers Jean This is called RTFM (Read The Fucking Manual)
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fabstar68		#6 Posted : 26 August 2024 10:42:54(UTC) Retweet
Joined: 14/12/2023(UTC) Posts: 60 Location: Milan		yep i RTFMed it multiple times, but just under that paragraph at page 5, it says "When you connect the LEDs according to fig. 1, you can omit the resistors firstly, as they are integrated in the decoder". since the connection that we are making is exactly that, i have interpretated the whole thing in this way : "Please note: LEDs must always be wired via a series resistor (unless you connect them according to fig. 1, read the paragraph below)! Please pay attention to the correct polarity of the LEDs! When you connect the LEDs according to fig. 1, you can omit the resistors firstly, as they are integrated in the decoder"

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marklinist5999		#7 Posted : 26 August 2024 12:38:09(UTC) Retweet
Joined: 10/02/2021(UTC) Posts: 3,889 Location: Michigan, Troy		When some Germans translate to English, it is confusing. Both are complex, maybe Deutsch more so. Many slangs, three dialects,low, middle and high. Subject and participle of sentences are also reversed usually.


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fabstar68		#8 Posted : 05 September 2024 15:50:17(UTC) Retweet
Joined: 14/12/2023(UTC) Posts: 60 Location: Milan		just to provide info that could be useful for others, eventually i connected the leds as i was thinking to be right, they are in parallel and with no resistors. They work fine, i checked that when i add the second led, the brightness doesn't change, and the load on the line is just a bit more than 2A, which is exactly what is written in the LEDs technical section. john methods works, too, given that he has been using it for a long time. just to share info. Fab

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