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  1. Rocboni

    PT Connection To Pump

    Basically you have a circulation pump with an attached inverter? The analog inputs are AI1 and AI2 you can use either, you’ll have to configure the inverter parameters to allow PID control as per page 17 onwards of the manual, have you done this? Depends on what your trying to do with it though.
  2. Rocboni

    Screw compressor MPCBs keep failing , Please Help !!

    Can the supply cable handle this increase in mccb size?
  3. Rocboni

    Screw compressor MPCBs keep failing , Please Help !!

    Can we get the part number of the MPCB, it could be a standard MCCB
  4. Rocboni

    Screw compressor MPCBs keep failing , Please Help !!

    I agree with the theory of frequent power loss causing the issue, possibly because when the motor looses power inertia takes over threfor it is acting like a generator and backfeeding the MCPB, when power is restored the motor needs to synchronise back in phase with the supply which can mimic a...
  5. Rocboni

    Safety relay Implementation

    Agreed, surely the motors etc that come with the new elevators should come Atex approved, on all the farm and grain handing equipment ive never seen one atex motor, I have noted that the rotation sensors and belt alignment sensors are atex approved,
  6. Rocboni

    Safety relay Implementation

    I Would say it should with the dust involved but nothing explosion proof is never installed.
  7. Rocboni

    Safety relay Implementation

    I’m only going to be working with enclosed conveyors and farm machinery really so, the risk is quite low
  8. Rocboni

    Safety relay Implementation

    I presume redundancy is only required on the motor control circuit for which the guard is operating for instance dual redundancy on the final elements of a bucket elevator where the safety relay is monitoring the inspection/clean out hatch but not required on say a airlock or blower which is...
  9. Rocboni

    The wiring of giant wedding/party Letters

    Yes you can, try rue amusement lighting, not who I use but they will have everything you need.
  10. Rocboni

    The wiring of giant wedding/party Letters

    If you are using carbochon caps which I've used extensively on funfair rides I'd be inclined to use led E14 lamps, and running them at extra low voltage through a transformer, makes it safer for prying fingers. Usually these caps fit into spiked lamp holders.
  11. Rocboni

    Safety relay Implementation

    Reading through the book I have it shows a category 3 stop diagram requiring dual redundancy at each stage of the safety function. For example where a guard switch on a particular elevator was activating the safety relay would dual redundancy on the final actuator for this elevator only be...
  12. Rocboni

    Ade optima compact bleeping

    HI, that’s exactly what it was, just nipped round when inspotted it in the manual, switched it off and it’s now fine! Thanks all
  13. Rocboni

    Ade optima compact bleeping

    Hi, I’ve been asked to look at a ADE optima compact plus as the zone 1 light is activating and it beeps everytime the PIR as activated I.e when someone walks Infront of it even when the system isn’t armed? You can press reset and the light goes off but as soon as it activates again it comes...
  14. Rocboni

    Safety relay Implementation

    Do you verify your own calculations? What qualifications do you actually need? I won’t be doing them, there’s certainly know one in the company qualified enough to verify, they dont even use safety relays.
  15. Rocboni

    Safety relay Implementation

    Well they are mostly to deal with blockages, obviously isolation and lock of takes place at the motor isolator. The Elevators don’t have a high inertia and stop within a few seconds. Good to know though, feel like I’m learning, the tricky bit is the risk assessment and actually determining the...
  16. Rocboni

    Safety relay Implementation

    Trying to relate this to an application I see quite a lot, grain elevators with hatches at the bottom for cleaning out, these often have a magnetic switch arrangement utilising the NC contact in the control circuit. Should something like this really have a safety relay monitoring the guard...
  17. Rocboni

    Safety relay Implementation

    When you say safety loop of the master what terminal do you mean s21 and s22, does this need to be dual channel? I presume this is how a global stop system work swith single buttons across multiple machines? Separate safety relays feeding one master? Could you run a 4 core swa through the...
  18. Rocboni

    Safety relay Implementation

    I knew this is the reply I would get, panel building is like a swear word on here, let’s forget I mentioned I built a have built few panels. Personally I know they were not to the correct standard and had a few cosmetic breaches but I was under instruction for my manager who designs be them but...
  19. Rocboni

    Safety relay Implementation

    Right, looking for some info from some of you control gurus. So I'm very interested in control sytems, panels etc have even built a few and have come across safety relays, trying to get the hang of how they are actually implemented into a control system, I've studied plenty of the safety relay...
  20. Rocboni

    Looks a squeeze, 240 swa thoughts.

    I would say SY is the best option here, it offers better screening properties than SWA, not sure if SWA can be classed as 360degree screening? depends if compliance with 89/336/EEC has to be met as defined by the standard EN 61800-3. Cable shield should be grounded at both ends. Can you not...

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