Appendix L: Hazardous Area Installations; Wiring Details; Intrinsically Safe Model - Siemens SITRANS LR200 Instruction Manual

Appendix L: hazardous area
installations
•

Wiring details

• Instructions specific to hazardous area installations
Wiring Details

Intrinsically Safe Model

FM/CSA (See page 111 for reference drawing 23650529, also available from the product
page of our website: www.siemens.com/processautomation.)
Under the entity evaluation concept, SITRANS LR 200 has the following characteristics:
(input voltage) U
(input current) I
i
(input power) P
i
(internal capacitance) Ci
(internal inductance) Li
Entity Concept:
The Entity Concept allows interconnection of intrinsically safe apparatus to associated
apparatus not specifically examined in such combination. The criteria for interconnection
is that the voltage and current which intrinsically safe apparatus can receive and remain
intrinsically safe, considering faults, must be equal to or greater than the output voltage
(Uo) and output current (Io) levels which can be delivered by the associated apparatus,
considering faults and applicable factors. In addition, the maximum unprotected
capacitance (Ci) and Inductance (Li) of the intrinsically safe apparatus, including
interconnecting wiring, must be equal to or less than the capacitance and inductance
which can be safely connected to associated apparatus.
Under the FISCO evaluation concept, SITRANS LR 200 has the following characteristics:
(input voltage) U
(input current) I
i
(input power) P
i
(internal capacitance) Ci
(internal inductance) Li
7ML19985HP01 SITRANS LR 200 (PROFIBUS PA) – INSTRUCTION MANUAL
= 24 V
i
= 250 mA
= 1.2 W
= 0
= 0
= 17.5 V
i
= 380 mA
= 5.32 W
= 0
= 0
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