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3.5.3 Zulassungsspezifikationen – Eigensichere F
HAZARDOUS (CLASSIFIED) LOCATION
Class I, Division 1, Groups A, B, C, D
Class II, Division 1, Groups E, F, G
Class III, Division 1
Eclipse Level Transmitter
Model 706-52XX-XXX
Ui (Vmax) = 17.5V
Ii (Imax) = 380 mA
Pi = 5.32 W
G
Ci = 440pF
Li = 2.7µH
G
Leakage current < 50µA
Eclipse Level Transmitter
Model 706-52XX-XXX
Ui (Vmax) = 17.5V
Ii (Imax) = 380 mA
Pi = 5.32 W
G
Ci = 440pF
Li = 2.7µH
G
Leakage current < 50µA
Any FM/CSA Approved
Intrinsically Safe
Associated Apparatus with
Parameters suitable for the
FISCO Concept.
APPROVED
TERMINATOR
Ui (Vmax) = 24V
Ii (Imax) = 280mA
Pi = 1.93W
or
Any approved termination on with
R = 90 ... 100
C = 0 ... 2.2µF
68
G
G
R
C
Fieldbus
™
-installation gemäß FM/CSA
OUnDATiOn
UNCLASSIFIED LOCATION
G
Any FM Approved
Intrinsically Safe
Associated Apparatus with Entity
Parameters suitable for the
FISCO Concept.
FISCO Concept :
The FISCO concept allows interconnection of intrinsically safe
apparatus to associated apparatus not speci cally examined in
such combination. The criteria for the interconnection is that the
voltage (Ui or Vmax), the current (Ii or Imax) and the power (Pi)
which intrinsically safe apparatus can receive and remain
intrinsically safe, considering faults, must be equal or greater than
the voltage (Uo or Voc or Vt), the current (Io or Isc or It) and the
power (Po or Pt) levels which can be delivered by the associated
apparatus, considering faults and applicable factors. In addition,
the maximum unprotected capacitance (Ci) and (Li) of each
apparatus (other than the termination) connected to the eldbus
must be less than or equal to 5nF and 10µH respectively.
In each segment only one active device, normally the associated
apparatus, is allowed to provide the necessary energy for the
eldbus system. The voltage (Uo or Voc or Vt), of the associated
apparatus has to be limited to the range of 14V to 24V d.c. All
other equipment connected to the bus cable has to be passive,
meaning that they are not allowed to provide energy to the
system, except to a leakage current of 50µA for each connected
device. Separately powered equipment needs a galvanic isolation
to assure that the intrinsically safe eldbus circuit remains
passive.
The cable used to interconnect the devices needs to have the
parameters in the following range:
Loop resistance R':
Inductance per unit length L':
Capacitance per unit length C':
C' = C' line/line + 0.5 C' line/screen, if both lines are oating or
C' = C' line/line + C' line/screen, if screen is connected to one
line.
Length of splice < 1m (T-box must only contain terminal
connections with no energy storage capability)
Length of spur cable: < 30m
Length of trunk cable: < 1km
At each end of the trunk cable an approved infallible termination
with the following parameters is suitable:
R = 90 ... 100
and C = 0 ... 2.2µF
The number of passive devices connected to the bus segment is
not limited for I.S. reasons. If the above rules are followed, up to
a total length of 1000m (sum of the length of the trunk cable and
all spur cables), the inductance and capacitance of the cable will
not impair the intrinsic safety of the installation.
Note:
FOR PROPER INSTALLATION REFERENCE ALL
APPLICABLE NOTES FROM PAGE 2 - 99-5072-001
AGENCY
LISTED DRAWING
ALL REVISIONS
TO THIS DRAWING
REQUIRE QA APPROVAL
57-606 ECLIPSE Modell 706 GWR-Füllstandmessumformer
G
15 ... 150
/km
0.4 ... 1mH/km
80 ... 200nF/km
099-5072
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