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2 port

The PS/2 port is a 6-pin mini-DIN connector used for connecting keyboards and mice to a PC compatible computer system. Its name comes from the IBM Personal System/2 series of personal computers, with which it was introduced in 1987. The PS/2 mouse connector generally replaced the older DE-9 RS-232 "serial mouse" connector, while the PS/2 keyboard connector replaced the larger 5-pin/180° DIN connector used in the IBM PC/AT design. The PS/2 keyboard port is electrically and logically identical to the IBM AT keyboard port, differing only in the type of electrical connector used. The PS/2 platform introduced a second port with the same design as the keyboard port for use to connect a mouse; thus the PS/2-style keyboard and mouse interfaces are electrically similar and employ the same communication protocol. However, unlike the otherwise similar Apple Desktop Bus connector used by Apple, a given system's keyboard and mouse port may not be interchangeable since the two devices use different sets of commands and the device drivers generally are hard-coded to communicate with each device at the address of the port that is conventionally assigned to that device. (That is, keyboard drivers are written to use the first port, and mouse drivers are written to use the second port.)

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  1. G

    2 port valve sticking open

    Hi, It appears the 2 port valve for the heating is sticking/stuck open. The heating is turned right down on the thermostat but when the hot water is on (separate 2 port valve) the radiators are also getting warm. I'm hoping it doesn't need to be a new valve...... Thanks in advance!
  2. L

    Replacing a 2 port valve

    Can anyone tell me if the thread size on a Honeywell 3/4 imperial valve is compatible with a 22mm valve.
  3. J

    Wiring of 2 port valves on a Green star 32cdi combi

    I was wondering if someone could explain how I would wire 2 2 port valves to a Worcester Bosch 32cdi combi boiler. The whole purpose is to split the heating into 2 separate zones controlled by there own thermostats. all wiring diagrams for the boiler show different connections to what I have...
  4. M

    2 port valve or programmer?

    Hi. I'm needing a bit of reassurance. I've had a long weekend, whilst enjoying my Sunday on the couch someone from around the corner called me to say their hot water wasn't working. It's an S plan with 2x two port valves. Heating works as it should on the timer and room stat. Hot...
  5. S

    2 Port Valve Operating But Still Intermittent Heating- New to this problem

    Help appreciated to help me think this one through.. :-) Have changed the synchro motor Gears are fine.. micro switch fully engages when hot water is switched on from timer.. you can see and hear the click from the microswitch the switch is calling for the boiler to burn.. hot water no...
  6. F

    Water Hammer on 2 Port Valve

    Hi Can someone help please. I get a massive bang when a two port valve closes. I have secured the pipes. It is an S plan and I believe it is the valve that goes to the hot water cylinder. If I turn the Thermostat up on the cylinder and get hot water from the boiler to flow and then turn...
  7. jaydebruyne

    3 & 2 port on same vented system

    Went to look at a job tonight.. when looking at the system it had a 3 port underneath the boiler and a 2 port just before the vented cylinder.. wtf?! Why would that be?
  8. gassafe

    Satchwell 2 port replacement help - wiring

    Gotta replace this ancient 2 port... Is it compatable with a modern 28mm Honeywell 2 port, can't find anything online! Wiring is obviously different according to the label! It's a satchwell 2 port on the cylinder return, the boiler is floor standing gravity set up where the boiler only fires...
  9. A

    Cylinder stat or 2 port?

    Hi guys been to a job recently, 2 port was held open when I got there. Cust only has hw when ch is on. ch will come on and off as it should so no issue there. customer said hw has been really hot lately. Cyl stat is held on with Sellotape. Was set at 40, but the dial just spins and will not...
  10. G

    2 port on UV cyl return

    Any thoughts on putting a 2 port on a megaflo return, which has a 3 port only set up. There is no room or pipework space to get it on the flow to cyl after the 3 port. Whoever fitted it must have thought the 2 port was a billy bonus for stock. My thinking is better on return than not at all.
  11. B

    Siemens 2 port valve bangs shut when off

    Hi, I was hoping to get some ideas to a problem I am having. i have a megaflo with a sealed system and a Valliant boiler. I have 3 x 2 port valves in the loft. ( water, central heating and underfloor hearings) The system was installed 5 years ago and we never had a problem until now. last...
    • Basicbob
    • Thread
    • 2 port 2 port valve bangs boiler central central heating system pressure siemens system valve
    • Replies: 9
    • Forum: Plumbing Jobs | The Job-board
  12. U

    Changing 2 port valve

    hi, can you swap a Siemens 2 port valve for a honeywell valve without having to change the pipes? will the new honeywell valve fit on the old thing that the siemens valve is connected to
  13. R

    2 port valve i.d

    is this a drayton? can the head be changed and any idea who stocks them? thanks.
  14. J

    2 port valve problem maybe?

    2 port valve problem maybe?My Boiler doesn't fire when the hot water is on. If I manually open the 2 port valve the boiler fires for a couple of seconds then shuts off again. Any help would be much appreciated
  15. U

    2 port valve problem maybe?

    My Boiler doesn't fire when the hot water is on. If I manually open the 2 port valve the boiler fires for a couple of seconds then shuts off again. Any help would be much appreciated
  16. M

    2 port valve only works with cover off!

    Recently fitted a new actuator and head unit to a Honeywell 2 port valve on the hot water. When calling for hot water, the valve opens, the pump runs but no boiler. When I take the cover off the valve and call for hot water, it works normally. This was the case on the previous valve that was...
  17. R

    Preferred 2 port motorized valve

    Hi I am renovating a bungalow and redoing all the heating and plan to generate a number of zones for radiator heating. In the past I have mainly used Honeywell 4043H but having had a head fail after 2 years in a previous property I am not sure that they are any better than some other makes these...
  18. A

    Familiar with Barlo 2 port valves?

    Been to a job, someone had been before me and changed a pump but still no hw. Customer hadn't turned heating on yet this year. I pushed lever on 2 port and it all fired up. Switched heating on appears to work ok. Turned both off at programmer, everything still runs. Removed programmer...
  19. Inverness

    swaping a danfoss 2 port motorised valve to be replaced with a honey well

    Changing over a danfoss 2port motorised valve for a Honeywell 2 port valve. The problem is the Honeywell has 5 wires but the danfoss has only four wires. It is a danfoss control box. Can someone please give advice for correct position for wires. cheers
  20. jaydebruyne

    Honeywell 2 port

    Just curious, I need to change a 2 port valve, there is an iso just above it but not below, if it's a sealed system can I not just shut off the iso and replace without draining, and if a vented system bung the feed and vent and replace without draining? It's a 2 floor house and the valve is on...
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