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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. 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...
  2. 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...
  3. 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...
  4. 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...
  5. M

    3 port valve fitted wrong way around

    Hi ..quick question . If mid position valve is fitted the wrong way around ....would swapping stats wireing around sort it out ...?
  6. N

    3 port valve problem

    Why does my heating only work when hot water is satisfied, the motorised valve only opens when hot water is up to temp when I turn up cylinder stat valve shuts again. Worked ok for long enough wondering if its the synchron motor but it seems to open valve ok when hot water is satisfied.
  7. C

    Advice on 3 port motorised valve? - I have an unusual wiring requirement

    Are there any 3 port motorised valves (preferable cheap) that do not require a constant mains current to flow when the value is either open or closed (ie it just needs current while actually opening or closing)? I'm trying to cobble together something for a small diesel heater to be used in a...
  8. Z

    When CH is switched off the 3 port valve stays in the man position therefore the CH stays on

    I have a Camray 5 90 external combi oil fired boiler. I replaced the 3 port valve body only as it was leaking and after that seemed to work ok. However shortly after when CH was being called for the accuator wasnt moving and had to manually be moved to man position to get CH. However the other...
  9. Jock Spanners

    Three Port Valve Puzzle

    Evening All, I changed a Drayton three port valve today as the valve was completely seized. It appears to be wired correctly. When I switch to HW it moves to HW and when I switch to Mid it moves to Mid. But when I switch to Heating it clicks repeatedly, the small lever on the actuator stays in...
  10. C

    Should my 3 port valve be a 2 port valve?

    Hi, I bought a house last (built 1988) which had a 3 port valve (Honeywell V4073A), a vented cylinder and 2x tanks in the loft. I had a plumbing company remove the cylinder, 2x tanks and replace it with an pressurised cylinder and filling loop along with new radiators. They chose to keep the...
  11. S

    3 port actuator replaced

    Hi I've just replaced my 3 port actuator. It was pretty straight forward. After I turned the power back on, it blew the 3amp fuse in the circuit board. What have I done wrong?
  12. A

    3 port hell

    Hi chaps, 15 year old Danfoss HSA3 - valve body was jammed so replaced with Tower 3 port - swapped orange with orange/ brown and white with white / grey with grey now boiler on all the time - incorrect wiring or could programmer also be at fault? thanks guys - dave :banghead::banghead:
  13. R

    honeywell 3 port

    sent my customer to screwfix to pick up a new 3 port. when i took it out the box it got me puzzled as there was only 3 wires and not the 5 as normal.. sent him to get another from the merchant with 5 wire and the serial numbers were all the same! whats that all about???????
  14. V

    3 port valve override floppy - possible wiring problem?

    Hi all, Im hoping one of you experts could shed some light on a potential issue.. but first a little background. In November 2016 I spent considerable money on a new boiler. The job involved: 1) removing old conventional boiler (in kitchen). Remove F&E tank from attic. 2) Install Valiant...
  15. R

    Sunvic MOMO 3 port problem

    I have a problem with a fairly new Sunvic SDMV2304 Motorised Mid Position 3-Port Valve (MOMO). It won't completely shut off the DHW and consequently the cylinder water is too hot. I have checked for complete rotation and this is fine. If I switch on the valve to make a complete rotation it then...
  16. J

    honywell 3 port valve running hot

    just replaced the motor because it was getting hot , new one does the same is this normal, as far as I can work out the motor has to keep running to keep the valve open because of the return spring, is this right, valve works okay with the motor or with the manual lever.
  17. X

    Holding a 3 port valve

    Hi is it possible to hold a vaccum with bungs and change a 3 port valve, and it is 3 openings and I believe you can only have 2 openings, if not does anyone have any other solutions without draining down, or any other tips. thanks
  18. J

    Sunvic motorised valve 3 port query

    I was having a few problems (rads on with only water switch down). Engineer came and fitted a new three port valve and acutator (was Danfoss, fitted Sunvic SD2701). the Sunvic has a metal lever, one side says normal use, the other end say flushing only. The metal lever can be locked on either...
    • JessDay
    • Thread
    • 3 port heating lever motorised motorised valve normal query sunvic valve water
    • Replies: 11
    • Forum: Plumbing Jobs | The Job-board
  19. B

    Max Kw boiler size for 3 port valve.

    Hello all, perhaps some one can tell me..is there a maximum size of kw boiler that can be used with a 3 port valve? The system is a gravity fed, 2 pipe system system with a heat only boiler. British Gas have said the 3 port valve needs replacing with 2 2 port valves as the a 3 port should not...
  20. J

    British Gas - 3 port valve sticking - power flush?

    The mother in law used British Gas to install her Worcester Greenstar 12 Ri boiler back in 2007!!! She also has a service contract with them at £38 a month!!!!! 3 years ago the 3 port valve was replaced. Each year it still stops working. So she calls them out and they say it's all working again...
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