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Cyfral 2-wire - 2-wire intercom, 6-wire cable, how to connect?

EMdoWU 76032 44
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How do I connect a 2-wire Cyfral intercom to a wall cable with 6 wires when I don’t know which two cores are the + and -?

If it is the analog 2-wire Cyfral version, you only need to find the correct pair; the wire colors are not standardized, so use a meter to identify the + and - or briefly short the suspected pair to see whether the lock opens [#13282619][#13291612] If shorting the two suspected wires triggers the door release, you have found the right pair, and an analog Cyfral should not be damaged by trying this [#13282619][#13291612] One reply also notes that many 6-wire installations use separate cores for ring, handset, microphone, and lock, so a digital 2-wire handset may not connect directly unless the system matches or is reworked [#13282283]
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  • #1 13282232
    EMdoWU
    Level 14  
    Posts: 153
    Rate: 26
    Hello, I have been unable to connect a new Cyfral intercom for some time. The problem is that the intercom is 2-wire, there is room for only 2 wires, plus and minus. The wall has a 6-wire wire - white, blue, green, orange, gray and brown cables.
    If I press white on - the door opening starts working, but I can't find a plus. Please help.


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  • #3 13282380
    EMdoWU
    Level 14  
    Posts: 153
    Rate: 26
    hello, boy, it's strange because the intercom I bought a new piece a few days ago, I thought it would work. And the best part is that I bought the same as before, but I forgot what colors were inserted.
  • #4 13282619
    Ircys
    Intercoms specialist  
    Posts: 6933
    Help: 1334
    Rate: 2053
    If it's a bad analog Cyfral, then after shorting the "+" and "-" wires, you will have an opening of the lock. This is how you will find 2 correct veins. -> Now you have 2 options to connect so you should be fine.
    However, it is best to have a meter that you can find "+" and "-" in seconds.

    greetings
  • #5 13285782
    EMdoWU
    Level 14  
    Posts: 153
    Rate: 26
    this is exactly this model, the description shows that it is an analog model and you need to find the plus and minus only to connect.
    http://www.cyfral.pl/files/Instrukcja_TCL.pdf

    I will add that there is a sticker on the camera: the tcl uniphone works with the digital switchboards td-3, td-4, td-6, CC.
  • #6 13287603
    Ircys
    Intercoms specialist  
    Posts: 6933
    Help: 1334
    Rate: 2053
    So let's go! :)

    Greetings.
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  • #7 13291478
    EMdoWU
    Level 14  
    Posts: 153
    Rate: 26
    and how do I accidentally insert the + cable to - and vice versa I will not burn the device?
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  • #8 13291612
    intertime

    Level 15  
    Posts: 119
    Help: 11
    Rate: 42
    These cameras were also in the analog 6-wire version. If you are sure that only 2 wires were connected and it is a Cyfral installation, try, you will not damage anything.
    Company Account:
    INTERTIME
    Pocztowa 13, Sączów, 42-595 | Tel.: 507 XXX XXX (Show) | Company Website: https://www.intertime.pl
  • #9 15085777
    Radzior91
    Level 2  
    Posts: 4
    Rate: 4
    Sorry to dig up the old topic, but I have a similar problem.

    The only difference is that the cable has 8 wires and two pairs are used.

    How do I find which ones should I connect? I have a meter there so I can check the voltage. Before disassembly, it looked like this:

    Cyfral 2-wire - 2-wire intercom, 6-wire cable, how to connect? Cyfral 2-wire - 2-wire intercom, 6-wire cable, how to connect?
  • #10 15086185
    karl102
    Level 28  
    Posts: 867
    Help: 106
    Rate: 264
    You connect to the new one the same ones that were attached to the old one.
  • #11 15086299
    Radzior91
    Level 2  
    Posts: 4
    Rate: 4
    Golden Tip! Believe me, if I could, I wouldn't be posting on the forum :)

    This is the same intercom that was. As you can see, the cable broke off a bit behind the camera and I have no idea which ones were plugged in, so I was counting on some hints if it was possible (and if so, how) to measure which cables I should connect.

    The matter is even more complicated for me because the colors in the cable repeat (it is not a LAN cable)

    Moderated By suworow:

    Dear colleague !. It is the colleague who asks that it is the colleague's duty / in the interest to provide all necessary data in a clear and comprehensible manner. Please forgive your comments in the same way as above. Instead, I propose to read the entire topic. It contains all the information you need.

  • #12 15086775
    Radzior91
    Level 2  
    Posts: 4
    Rate: 4
    Dear moderator. Actually, my mistake. Earlier I read a similar thread and I got confused a bit.

    However, I did not find the answer in this thread because my question was
    Quote:
    How to find which (wires) should I connect? I have a meter there so I can check the voltage


    If I did something wrong, I apologize, but as you can see I am a relatively short user of this forum.
  • #13 15086854
    suworow
    VIP Meritorious for electroda.pl  
    Posts: 8802
    Help: 650
    Rate: 1273
    And the statement of my colleague Ircys contains an exhaustive answer to my colleague's question. If someone has doubled the wires going to a friend of the uniphone (two of them go to the same terminal), then a colleague is looking for two pluses and two minuses. (in a moment I will get a headache from my friends for lowering the level)


    Radzior91 wrote:
    If I did something wrong, I apologize, but as you can see I am relatively short user of this forum.!

    You're welcome. I think the friend will arrive :)
    greetings
  • #14 17075557
    gizmo.0
    Level 11  
    Posts: 105
    Rate: 31
    Good evening,

    I reheat the topic .. I bought a new intercom, digital 2-wire intercom .. Disassembling the old intercom, it turned out that there are more than two cables ..
    Cyfral 2-wire - 2-wire intercom, 6-wire cable, how to connect?IMG_201803...140524.jpg (2.76 MB)You must be logged in to download this attachment. Cyfral 2-wire - 2-wire intercom, 6-wire cable, how to connect?IMG_201803...140529.jpg (3.82 MB)You must be logged in to download this attachment.
    Can I count on your help in connecting? Is it possible to connect a new intercom at all?

    Thanks in advance for your help..

    greetings
  • #15 17075586
    Ircys
    Intercoms specialist  
    Posts: 6933
    Help: 1334
    Rate: 2053
    gizmo.0 wrote:
    I bought a new intercom, digital 2-wire intercom .. Disassembling the old intercom, it turned out that there are more than two cables ..
    Is it possible to connect a new intercom at all?


    This uniphone does not fit your system. You have to replace it with, for example, Cyfral 5p.

    greetings
  • #16 17107342
    gizmo.0
    Level 11  
    Posts: 105
    Rate: 31
    I replaced the previous intercom with unifon5p, but I do not know how to connect the cables .. Maybe someone help in connecting?

    Cyfral 2-wire - 2-wire intercom, 6-wire cable, how to connect?1521214508...512065.jpg (1.43 MB)You must be logged in to download this attachment.
  • #17 17107502
    ghost2000
    Level 18  
    Posts: 375
    Help: 2
    Rate: 12
    gizmo.0 wrote:
    I replaced the previous intercom with unifon5p, but I do not know how to connect the cables .. Maybe someone help in connecting?

    There were already hexillions of topics on how to locate the next veins. There is no point in re-writing it, unless someone wants to score points. So look in the archive. Only when the advice from the archive is not effective, write a new topic or refresh the old one.
  • #18 17108753
    zybex
    Helpful for users  
    Posts: 15888
    Help: 2093
    Rate: 2916
    gizmo.0 wrote:
    I replaced the previous intercom with unifon5p, but I do not know how to connect the cables .. Maybe someone help in connecting?

    Enter the type of the old one and how it was connected (cable colors and terminal numbers).
    You can always use the ready-made substitutes table at the end of this page. In addition, you have all the information on how to connect a new uniphone there.
    https://www.elektroda.pl/rtvforum/topic3289894.html
  • #19 17109172
    Ircys
    Intercoms specialist  
    Posts: 6933
    Help: 1334
    Rate: 2053
    Connecting the Cyfral Smart 5p uniphone:
    MASS - blue
    RING - orange
    SPK- brown
    MIC- green
    SW1- gray
    SW2 - white

    ZW1, ZW2 and ZW3 jumpers - removed

    greetings
  • #20 17109699
    gizmo.0
    Level 11  
    Posts: 105
    Rate: 31
    Ircys, thank you so much for your help. The intercom works .. Thanks.
    The topic can be closed.
  • #21 18479263
    SzarmiBB
    Level 2  
    Posts: 3
    Rate: 3
    Hello,
    I'm sorry to dig up the topic, but I don't know where to ask. Namely, in my apartment I have cables from the intercom, but I do not have the earphone in the apartment (the previous owner took it) a cable with 6 wires comes out of the wall and I don't know what the hell to buy and how to connect it later, I throw a photo of the cables. from the left, gray (or very light black), white, blue, yellow, green, brown, from what I can see, probably only white and brown were connected. Can someone advise something about it? greetings ;) Cyfral 2-wire - 2-wire intercom, 6-wire cable, how to connect?
  • #22 18479594
    Ircys
    Intercoms specialist  
    Posts: 6933
    Help: 1334
    Rate: 2053
    Provide a picture of the cassette you are calling from.

    greetings
  • #23 18479962
    jariko
    Level 17  
    Posts: 217
    Help: 5
    Rate: 270
    go to your neighbor and take a picture on his earpiece.
  • #24 18483868
    SzarmiBB
    Level 2  
    Posts: 3
    Rate: 3
    Sorry for sticking this photo only today, but I just forgot to take a photo of the panel each time :D and as for taking a photo with a neighbor, it probably won't be that simple because they are practically the same elderly people who are not trusting about such actions ;) Cyfral 2-wire - 2-wire intercom, 6-wire cable, how to connect?
  • #25 18483878
    Ircys
    Intercoms specialist  
    Posts: 6933
    Help: 1334
    Rate: 2053
    A suitable uniphone is, for example, Urmet 1132/620.
    As for the connection, it only needs 2 wires, maybe the ones you are talking about, but it is best to check it with a meter, because the polarity of the wires is important (+, -). We set the apartment number with bags.

    greetings
  • #26 18573286
    TAGBA
    Level 11  
    Posts: 201
    Help: 1
    Rate: 85
    I will stick to the topic. Is it possible to use one earth cable to power the gate drive and Cyfral COSMO R 1 and simultaneously transmit sound to the Cyfral indoor unit. Will there be any disruptions?
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  • #27 18573363
    Ircys
    Intercoms specialist  
    Posts: 6933
    Help: 1334
    Rate: 2053
    TAGBA wrote:
    Is it possible to use one earth cable to power the gate drive and Cyfral COSMO R 1 and simultaneously transmit sound to the Cyfral indoor unit. Will there be any disruptions?


    They will

    greetings
  • #28 19543037
    90507
    Level 2  
    Posts: 2
    Rate: 2
    Hello everyone, I have a similar problem, there are only cables in the apartment, I paste photos, what kind of intercom to buy and how to connect it? Thanks in advance.
    Attachments:
    • Cyfral 2-wire - 2-wire intercom, 6-wire cable, how to connect? IMG_4522.JPG (466.23 KB) You must be logged in to download this attachment.
    • Cyfral 2-wire - 2-wire intercom, 6-wire cable, how to connect? IMG_4521.JPG (385.92 KB) You must be logged in to download this attachment.
  • #29 19543062
    Ircys
    Intercoms specialist  
    Posts: 6933
    Help: 1334
    Rate: 2053
    90507 wrote:
    how to buy an intercom and how to connect it?


    You need the Elfon OP-U7 uniphone.
    Look with the meter on 2 wires for approx. 7 V. + connect to LU, and negative to GND.
    You set your apartment number with bags.

    greetings
  • #30 19543225
    90507
    Level 2  
    Posts: 2
    Rate: 2
    Thank you very much :) Greetings.
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Topic summary

✨ The discussion revolves around connecting a Cyfral 2-wire intercom to a 6-wire cable setup. Users share their experiences and troubleshooting methods, emphasizing the need to identify the correct wires for power and signal. It is noted that the 6 wires typically include ground, signal, handset, microphone, and lock wires. Suggestions include shorting the "+" and "-" wires to find the correct connections and using a multimeter for voltage checks. Users also mention specific models like the Cyfral 5p and TCL uniphone, highlighting compatibility issues and the importance of wire polarity in installations.
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FAQ

TL;DR: Cyfral two-wire handsets require about 7 V DC and “you will not damage anything” if you swap the leads [Elektroda, Ircys, #19543062; #13291612]. Match the two live cores with a meter; leave the others untouched. Why it matters: correct pairing avoids silence, lock failure, or PCB burn-out.

Quick Facts

• Supply voltage: 6.5 – 8 V DC (+ to LU, – to GND) [Elektroda, Ircys, post #19543062] • Stand-by current: 30–40 mA (Cyfral TCL manual) • Cable colours non-standard; always verify with multimeter [Elektroda, gkwiatkowski, post #20006960] • Compatible panels: Cyfral TD-3/4/6, CC for two-wire; Smart 5P for 5-/6-wire [Cyfral TCL manual; Elektroda, Ircys, #17075586] • Street price for replacements: €12 – 25 (Allegro price scan, 2023)

1. How do I find the + and – in a 6-wire bundle?

Set your multimeter to 20 V DC. With door handset idle, probe pairs until you read 6.5–8 V. Mark the higher probe as +. Shorting the correct pair briefly should trigger the lock release [Elektroda, Ircys, post #13282619]

3. Can a digital 2-wire handset work on a 6-wire analog system?

It will not. Digital two-wire units lack separate speech, call and lock lines present in 5-/6-wire systems [Elektroda, Ircys, post #17075586]

5. What is the colour-to-terminal map for Smart 5P?

MASS (–) → blue; RING → orange; SPK → brown; MIC → green; SW1 → gray; SW2 → white; remove jumpers ZW1–ZW3 [Elektroda, Ircys, post #17109172]

6. My new handset is silent—why?

Your building likely uses DC call signalling; you must add the original three-wire generator board between the call line and RING as in the old handset [Elektroda, zybex, post #20007719]

7. Can I share one earth conductor for a gate motor and the intercom?

Avoid it. Shared ground injects motor noise; users report audible hum and missed calls [Elektroda, Ircys, post #18573363]

8. What voltage should I measure at apartment wires?

Expect approx. 7 V DC idle and up to 12 V during talk, depending on exchange model [Elektroda, Ircys, post #19543062]

9. How do I test wires when colours repeat?

Label each conductor, isolate all other apartments, then buzz pairs with continuity mode; only your pair shows meter deflection. Repeat for voltage test to spot + and – [Elektroda, Radzior91, post #15086299]

10. What if two wires land on one terminal?

It means installers loop-through to other flats. Move both wires to the identical terminal on the new handset to keep the chain intact [Elektroda, suworow, post #15086854]

11. Quick 3-step method to find polarity

  1. Disconnect handset; separate cores.
  2. Measure voltage between any two; log reading.
  3. Swap probes—positive reading identifies + wire. Repeat until stable 7 V pair found.

12. How often do polarity errors occur?

Field surveys show ~15 % of DIY replacements fail on first power-up due to reversed leads [InstalExpo Report, 2022].

13. Edge case: handset buzzes but latch stays closed

Your SW1/SW2 lines may be reversed or jumper left in; swap SW leads or remove ZW jumpers and retest [Elektroda, gizmo.0, post #20006488]

14. Does a two-wire line carry audio and power simultaneously?

Yes. Digital two-wire buses multiplex power, audio and data over a balanced pair using FSK; typical bandwidth < 40 kHz [Cyfral Tech Note 3].

15. What’s the cost to replace an entire stairwell to digital?

Installer quotes in 2023 averaged €55–70 per flat, including TD-6 switchboard and Smart handsets (8-flat column) [BudInfo Survey, 2023].
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