A5E32337695 SITRANS Probe LU (HART) – OPERATING INSTRUCTIONS Page 99
G: Hazardous Installation
FM Intrinsically safe connection drawing
Note: Reference drawing 23650516 is available from the product page of our website
at: www.siemens.com/probelu.
Product Group
FOR INTERNAL
USE ONLY
2365051601
S. NGUYEN
PETERBOROUGH
17/DEC/03
ULTRASONICS
FOR APPROVAL
CHANGE THE Li VALUE TO 0.5 mH
PER ECO 79B42578
0
1
S. MILLIGAN
R. CLYSDALE
1:1
1
1
NTS
B
SITRANS Probe LU,
INTRINSICALLY SAFE
CONNECTION DIAGRAM
23650516
1
RPC
RPC
SN
SN
DEC
17/03
APRIL
09/2007
NOTES:
1. ANY CSA / FM INTRINSICALLY SAFE BARRIER / POWER SUPPLY, WITH ITS OUTPUT
VOLTAGE (Uo) NOT EXCEEDING 30 V AND ITS OUTPUT CURRENT (Io) LIMITED BY
LOAD RESISTANCE (Ro); SUCH THAT Io = Uo / Ro, DOES NOT EXCEED 120 mA
2. APPROVED DUST-TIGHT AND WATER-TIGHT CONDUIT SEALS ARE REQUIRED
FOR CLASS II, DIV.1, Gr. E, F, G AND OUTDOOR NEMA 4X/TYPE 4X LOCATIONS
3. THE MAXIMUM VOLTAGE OF THE NON-INTRINSICALLY SAFE APPARATUS
MUST NOT EXCEED 250 V rms.
4. UNDER THE ENTITY EVALUATION CONCEPT, THE SITRANS Probe LU HAS THE
FOLLOWING:
Ui = 30 VOLTS D.C. Ii = 120 mA Pi = 0.8 W
Ci = 3.6 nF Li = 0.5 mH
5. SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY.
6. INSTALL PER NEC / CEC
7. USE SUPPLY WIRES RATED FOR 10 ° ABOVE.
8. EXTERNAL BONDING HUBS ARE REQUIRED WHEN BOTH CONDUIT ENTRIES ARE USED.
THE ENTITY EVALUATION CONCEPT IS A METHOD USED TO DETERMINE
ACCEPTABLE COMBINATIONS OF INTRINSICALLY SAFE APPARATUS AND
CONNECTED ASSOCIATED APPARATUS THAT HAVE NOT BEEN
INVESTIGATED IN SUCH COMBINATION.
HAZARDOUS AREA
NON-HAZARDOUS AREA
SAFE AREA APPARATUS
INTRINSICALLY SAFE
(SEE NOTE 1)
Load
4–20mA
ENTITY CONCEPT DEFINITION: THE ENTITY CONCEPT ALLOWS THE INTERCONNECTIONS OF INTRINSICALLY
SAFE APPARATUS TO ASSOCIATED APPARATUS NOT SPECIFICALLY EXAMINED IN SUCH COMBINATIONS.
THE CRITERIA FOR INTERCONNECTION IS THAT THE VOLTAGE AND CURRENT WITH INTRINSICALLY SAFE
APPARATUS CAN RECEIVE AND REMAIN INTRINSICALLY SAFE, CONSIDERING FAULTS, MUST BE EQUAL OR
GREATER THAN THE VOLTAGE (Uo) AND CURRENT (Io) LEVELS WHICH CAN BE DELIVERED BY
THE ASSOCIATED APPARATUS, CONSIDERING FAULTS AND APPLICABLE FACTORS. IN ADDITION, THE MAX.
UNPROTECTED CAPACITANCE (Ci) AND INDUCTANCE (Li) OF THE INTRINSICALLY SAFE APPARATUS, INCL.
INTERCONNECTING WIRING, MUST BE EQUAL OR LESS THAN THE CAPACITANCE AND INDUCTANCE WHICH
CAN BE SAFELY CONNECTED TO THE ASSOCIATED APPARATUS.
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