[foxboro] AW: Foxboro SIL Rating

Hi,

for our projects we often use the Triconex PLC with SIL certificate and
direct connected/integrated to I/A System via Nodebus.

Because peer to peer with the Triconex is possible, we safe signal =
doubling
and additionally engineering work.
Also you have the Triconex diagnosys direct on the operator station
available.
For this solution ask your key account, I have only german =
documentation.

Regards

Heinz Maurer
Vertriebsbuero Duesseldorf

Invensys Systems GmbH
Heerdter Lohweg 53-55
40549 Duesseldorf
Germany

Tel.:     +49 (0) 211 5966 -333
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Email:   heinz.maurer@xxxxxxxxxxxx
http://www.invensys-process-systems.de

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> -----Urspr=FCngliche Nachricht-----
> Von:  Corey R Clingo [SMTP:clingoc@xxxxxxxxxxxxx]
> Gesendet am:  Montag, 29. April 2002 19:49
> An:   foxboro@xxxxxxxxxxxxx
> Betreff:      Re: [foxboro] Foxboro SIL Rating
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> We generally use a separate, TUV-approved programmable safety system =
(PES
> in ISA S84 terminology) for these applications.  Where the I/A must =
use
> inputs that go to the PES, we repeat the signals via outputs for
> control/interlock loops, with some multiplexed data transfer (Modbus
> serial, Ethernet, native DCS network interfaces) for non-critical =
data.
> Except in a few isolated cases (e.g., turbomachinery controls), S84
> requires the separation of the control system and the safety system.  =
 I
> suspect IEC 61508/61511 has similar requirements.
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> Corey
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>=20
> "Ghodhbani, Hafedh" <hafedh.ghodhbani@xxxxxxxxxxxx>@freelists.org on
> 04/28/2002 06:14:53 AM
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> Please respond to foxboro@xxxxxxxxxxxxx
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> Sent by:    foxboro-bounce@xxxxxxxxxxxxx
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> To:    Foxboro
> cc:
> Subject:    [foxboro] Foxboro SIL Rating
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>=20
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> Gents,
> As we all know, the Foxboro system is not certified for
> any SIL (Safety Integrity Level) rating. This means that : If we =
would
> like
> that our safety functions are SIL rated, so a new certified ESD =
System is
> to
> be installed.
> Foxboro system needs to be used only for control logic.
> The above situation generated long discussions, essentially when SIL =
study
> was carried out for new plant extention.
> I am very concerned to know if you faced such situation. How did you =
dealt
> with it?
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> Note: To know more about SIL Rating, see IEC 61508.
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> Hafedh Ghodhbani
> Senior C&I Engineer
> British Gas.
> Tel: 00 216 74 259 250
>=20
> =
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