Re: [foxboro] FBM224-multiple slaves on one port
- From: Corey R Clingo <corey.clingo@xxxxxxxx>
- To: foxboro@xxxxxxxxxxxxx
- Date: Mon, 9 Jul 2007 09:34:43 -0500
If you get a chance to do a test, let us know.
Ours have a test plug and receptacle inside the bucket for the same
purpose, and we could also do this; we would just have to remind our power
distribution folks that handle MV gear to switch it when they were
preparing for motor removal.
Thanks,
Corey Clingo
BASF Corporation
"Bob Wingard" <bwingard@xxxxxxxxx>
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07/07/2007 08:38 PM
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Re: [foxboro] FBM224-multiple slaves on one port
Corey,
We have a couple of FBM224s communicating with GE Multilin 469s in a 2300v
MCC. One installation has six starters on one 485 network and the other
has
4 with room for 2 more.
I can not tell you exactly how much delay one or more of the slaves being
powered off adds to the network cycle time, but I can say we have not
noted
any perceivable increase in the delay to start or stop one of these
devices.
We have an outage coming up at the end of the month; maybe I will do some
testing.
Our MCCs are wired with a test switch. The test switch allows for the
control circuits to be powered up with the bucket racked out. The 110v
power
comes from a source other that the control power transformer. These
lineups
are fairly new and they met code when installed.
Regards,
Bob Wingard
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