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3 port

DisplayPort (DP) is a digital display interface developed by a consortium of PC and chip manufacturers and standardized by the Video Electronics Standards Association (VESA). It is primarily used to connect a video source to a display device such as a computer monitor. It can also carry audio, USB, and other forms of data.DisplayPort was designed to replace VGA, FPD-Link, and Digital Visual Interface (DVI). It is backward compatible with other interfaces, such as HDMI and DVI, through the use of either active or passive adapters.
It is the first display interface to rely on packetized data transmission, a form of digital communication found in technologies such as Ethernet, USB, and PCI Express. It permits the use of internal and external display connections. Unlike legacy standards that transmit a clock signal with each output, its protocol is based on small data packets known as micro packets, which can embed the clock signal in the data stream, allowing higher resolution using fewer pins. The use of data packets also makes it extensible, meaning more features can be added over time without significant changes to the physical interface.DisplayPort can be used to transmit audio and video simultaneously, although each can be transmitted without the other. The video signal path can range from six to sixteen bits per color channel, and the audio path can have up to eight channels of 24-bit, 192 kHz uncompressed PCM audio. A bidirectional, half-duplex auxiliary channel carries device management and device control data for the Main Link, such as VESA EDID, MCCS, and DPMS standards. The interface is also capable of carrying bidirectional USB signals.The interface uses an LVDS signal protocol that is not compatible with DVI or HDMI. However, dual-mode DisplayPort ports are designed to transmit a single-link DVI or HDMI protocol (TMDS) across the interface through the use of an external passive adapter, enabling compatibility mode and converting the signal from 3.3 to 5 volts. For analog VGA/YPbPr and dual-link DVI, a powered active adapter is required for compatibility and does not rely on dual mode. Active VGA adapters are powered directly by the DisplayPort connector, while active dual-link DVI adapters typically rely on an external power source such as USB.

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  1. J

    3 port zone valve question

    Can a three port zone valve allow circulation through both rad circuit and cylinder coil at same time or does one circuit take priority??
  2. R

    Swapping a Danfoss valve for a Honeywell

    Kingo. Did you resolve your 3 port valveswop re wiring.
  3. Bogart

    Flow rates through 2 and 3 port valves.

    Yes it me again with another question. I keep reading that one will get a better flow rate in an S plan than in a Y plan. Now I can see that being valid if both heating and hot water are called for but if only one surely the flow rate will be the same for both plans? Finally are there any makes...
  4. M

    3 port valve

    How can you tell if it's just the motor that has gone on a 3 port valve?
  5. P

    3 Port Valve - Replace the whole thing or just the head? Videos included!

    Hi plumbers and DIYers I made a post about my 3-port valve a couple of weeks ago, but have finally been able to take a look and thought best to start a new one than tag on. Hope that's ok. Recap: We've had a problem whereby our boiler will only heat the radiators, even when set to hot water...
  6. S

    Honeywell 3 port valve not moving & making loud noises

    Hey all, Recently the Honeywell V4073A 3 port valve in the air cupboard has starting making loud screeching noises and the system is also not operating as it should. I've noticed that the Radiators are not getting hot but just warm and the thermostat isn't having any effect on switching boiller...
  7. R

    4 siemens 3 port valves burnt out in a year.

    Changed a clients burnt out 3 port siemens DVA3 heating valve head like for like this time last year. Just put it down to normal wear. Then it burnt out in April. I thought unlucky, siemens not great but ok and changed it. Told client to make sure not to cover it etc as I know they can get hot...
  8. Reddwarf4ever

    Honeywell V4073A 3 Port Motorised Valve Wiring question

    Hi i checked the wiring colours are the same from the junction box to the current 3 port valve, as the new one. But although I could turn off the house mains, I would prefer not to, is it easy to tell if the wires are live, using a multimeter, ? Have an isolation switch, but not 100% sure if...
  9. Spike47

    Wiring 3 Port valve Wiring Station

    Hi Can anyone have a look at a picture of a Wiring Station for a 3 port mid way Valve, against a drawing that I have tried to do, wanting know if the black wire going into 8 could be the feed to the Boiler ! . cheers Spike
  10. Spike47

    Siemens DVA3 3 Port Mid Position

    Hi I have a faulty Siemens DVA3 3 Port Mid Position Actuator that needs replacing, Can get a Drayton MA1 quite cheap, will this fit in place of the Siemens ! . Spike
  11. K

    Central heating not working 3 port valve?

    Hi all, Not posted for some time but come up against a small problem. Been off the tools for many years now but I think I know the issue but looking for some reassurance Boiler isn't firing when programmer and room stat is calling for heating, but does for HW. It's a Y plan system, new house...
  12. L

    No hot water and heating comes on! Changed 3 port valve.

    I wonder if anyone could help. Problem: We have no hot water and the heating comes on when we switch the hot water on from the boiler programmer to heat the hot water up. Our boiler is a Potterton Suprima or (Supr1ma). What we’ve done so far: My neighbour switched the three port valve so...
  13. L

    Wanted; S Y & W plan valves and wiring centre - Used or Faulty

    Wanted; 2 zone valves, 1 midpoint valve, 1 3 port diverted and wiring centre - Used or Faulty Hi, I'm after the above so that I can a mock CH/HW setup to add to my electrical play rig (see link) I'm usually found on EF but figured here would be the more suitable place to ask if anyone has any...
  14. D

    Help identify old 3 port myson pump

    Help in identifying this myson 3 port pump?
  15. F

    Advice on Sunvic 3 port valve

    Hi All, I'd like to swap my Sunvic 3 port motorised port for a Honeywell. The issue I have is that the Sunvic has 4 wires and the Honeywell has 5? Anyone know if this can be done? Thanks
  16. D

    3 port motorised valve wiring question.

    Good evening everyone, Question 1 I have just replaced my 3 port motorised valve head and wired it in. When looking at my chocolate block connector the orange and grey wires are in different places than the diagram on the instructions shows. As you look at the terminal block for all the wiring...
  17. D

    3 port motorised valve wiring question.

    Good evening everyone, Question 1 I have just replaced my 3 port motorised valve head and wired it in. When looking at my chocolate block connector the orange and grey wires are in different places than the diagram on the instructions shows. As you look at the terminal block for all the wiring...
  18. J

    Honeywell 3 port diverter snag?

    G'Day fellers. Appreciate your help please: When my boiler fires up it heats the water and radiators regardless of what is selected. I'm guessing that this means the valve is not moving from the de-energised position? Its a Honeywell V4073A. The manual/auto lever moves freely both ways and...
  19. T

    Danfoss HS3 3 Port Valve Question

    Hi guys, Two questions I am hoping you can help me with. 1) My Danfoss HS3 motorised actuator has a rest position of B hot water as I found out is normal. Once I put the central heating on the valve winds fully to A again as expected but once the CH has been turned off the valve remains at A...
  20. fronty

    How stiff should the 3 port valve be?

    Had a couple occasions where roomstat was calling for heat but boiler wouldn't fire. Wiggled the head on the 3 port valve (Drayton MA1) and the lever would then move from M to H, there'd be a click, the pump would come on and the boiler would fire. Actually on both occasions it looked like the...
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