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Page EN-12
SITRANS LR200 (HART) – QUICK START MANUAL
7ML19985XC81
mmmmm
English
• For wiring requirements:
N. America:
See the connection drawings listed above, which can be
downloaded from the product page of our website at:
www.siemens.com/LR200.
Europe:
Follow local regulations.
Australia:
Follow local regulations.
International:
Follow local regulations.
• Use appropriate conduit seals to maintain IP or NEMA rating.
• Recommended intrinsically safe barriers are listed under
Instructions specific to hazardous area installations
on page 13 and the ATEX
certificate listed above.
Passive Shunt Diode Barriers
How to select a passive barrier for SITRANS LR200
To make sure that the barrier safety description is suitable for the LR200 Intrinsically Safe (IS)
input parameters, carry out the following calculations:
Re-e
=
max. end-to-end resistance of the barrier
Rloop
=
loop resistance (total of cable resistance plus e.g. sense resistance,
displays, and/or PLC inputs)
Vbarrier =
value of any non-linear voltage drops due to the barrier
1)
Determine the value for Re-e from the data sheet.
2)
Calculate the total value for Rloop: by adding, for example, sense resistance, displays,
and/or PLC inputs.
3)
Calculate Rworking = Re-e + Rloop.
Note:
Selecting a suitable PLC input module, power supply, or barrier requires knowledge
about Intrinsic Safety and the application. It is the responsibility of the installer to ensure that
the intrinsically safe installation complies with both the apparatus approval requirements and
the relevant national code of practice.
Note:
A well regulated supply voltage is required.
Manufacturer
Part Number
MTL
787SP+ (Dual Channel)
MTL
7787P+ (Dual Channel)
Stahl
9001/01-280-100-10 (Single Channel)
Stahl
9002/01-280-110-10 (Dual Channel)
Содержание Sitrans LR200
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Страница 99: ...Σελίδα EL 24 SITRANS LR200 HART ΠΕΡΙΛΗΠΤΙΚΟ ΕΓΧΕΙΡΙ ΙΟ Ο ΗΓΙΩΝ 7ML19985XC81 mmmmm Ελληνικά Σηµειώσεις ...
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Страница 195: ...Pagina NL 24 SITRANS LR200 HART QUICK START HANDLEIDING 7ML19985XC81 mmmmm Nederlands Opmerkingen ...
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Страница 221: ...Página PT BR 24 SITRANS LR200 HART MANUAL DE INÍCIO RÁPIDO 7ML19985XC81 mmmmm Português Observações ...
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