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["Visser, Gerard" <gvisser AT indiana.edu>]

hi Mike,

   Thank you for documenting it on FST side. So after all (this is different than I thought was said in the meeting this morning) the coolind system does not feed into the Jim Thomas interlock but is just done separately.

    I think this is all fine and no actions needed for FST as such. I hope that the Jim Thomas interlock system can be maintained in case of any failure during the run, although AFAIK it has a good record. Still someone might want to have better documentation and be sure parts are available, I don't know. But this is not for the FST group.

   Can you do me a favor and confirm that the FST cooling system interlock does not​ kill GMT power. There is a separate (??) panel just like what you just documented, for GMT, right? (Could you document it too please?) It is probably mounted in the same place. [Or, there is only one such panel, then please show the GMT connections in same diagram. Sorry I don't know which way it has been done, at all.]

   Gerard

p.s. To be clear, I don't think anything more than looking should be done to see what output from the JT PLC goes to FST. Cutting cable ties and moving wires is not something that we as FST should ask for. The output has always worked, no doubt it will keep working...

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From: Capotosto, Michael <capotosto AT bnl.gov>
Sent: Monday, August 16, 2021 5:16 PM
To: Visser, Gerard <gvisser AT indiana.edu>; Ye, Zhenyu <yezhenyu AT uic.edu>; Videbaek, Christian <cvidebaek AT bnl.gov>
Cc: Star-fst L <star-fst-l AT lists.bnl.gov>
Subject: FST Interlocks Wiring Scheme

 

Hi Everyone,

 

I traced out the FST Interlocks panel that’s mounted in 2C8, and just put together a quick connection diagram for you all to review.

 

For the Jim Thomas PLC interlock – It looks like it ties back to a relay contact, but I’m not sure which of the many it’s tied into. Zhenyu had found this diagram (attached image), but it doesn’t call out IST, perhaps we can ask Alexei to trace it out if it’s a concern which relay contact it actually goes to (You have to remove a panel and flip it up to get access, and probably cut some zip ties to trace the cable out, which contains 120V at the moment)

 

--Mike