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Installation Drawings
C'= C' line/line + C' line/screen, if the screen is connected to one line
Length of spur Cable:
Length of trunk cable:
Length of splice:
Terminators
At each end of the trunk cable an approved line terminator with the
following parameters is suitable:
R = 90 ...100 W
C = 0 ...2.2 mF.
System evaluation:
The number of passive devices like transmitters, actuators, connected
to a single bus segment is not limited due to I.S. or N.I. reasons.
Furthermore, if the above rules are respected, the inductance and
capacitance of the cable need not to be considered and will not
impair the intrinsic safety or nonincendive safety of the installation as
applicable.
The sensor circuit is not infallibly galvanically isolated from the
Fieldbus input circuit. However, the galvanic isolation between the
circuits is capable of withstanding a test voltage of 500 Vac during 1
minute.
30 STT17F Smart Temperature Transmitter Operator Manual
max. 30 m
max. 1 Km
max. 1 m
Installation Notes for FISCO and Entity Concepts:
1. The Intrinsic Safety Entity concept allows the interconnection of
FM- / CSA-approved intrinsically safe devices (Div. 1 or Zone 0
or Zone1), with entity parameters not specifically examined in
combination as a system when:
Uo or Voc or Vt ≤ Vmax, Io or Isc or It ≤ Imax, Po ≤ Pi.
Ca or Co ≥ ΣCi + ΣCcable, La or Lo ≥ ΣLi + ΣLcable, Po ≤ Pi.
2. The Intrinsic Safety FISCO concept allows the interconnection of
FM- / CSA-approved intrinsically safe devices with FISCO para-
meters not specifically examined in combination as a system when:
Uo or Voc or Vt ≤ Vmax, Io or Isc or It ≤ Imax, Po ≤ Pi.
3. Control equipment connected to the Associated Apparatus must
not use or generate more than 250 Vrms or Vdc.
4. Intrinsically Safe Installation should be in accordance with
ANSI/ISA RP12.6.01 (except chapter 5 for FISCO Installations)
"Installation of Intrinsically Safe Systems for Hazardous
(Classified) Locations" and the National Electrical Code
NFPA 70) Sections 504 and 505.
5. The configuration of associated Apparatus must be FM Approved
or CSA Approved under the associated concept.
6. Associated Apparatus manufacturer's installation drawing must
be followed when installing this equipment.
7. The equipment is approved for Class I, Zone 0, applications.
If connecting AEx[ib] associated Apparatus or AEx ib I.S.
Apparatus to the equipment the I.S. circuit is only suitable for
Class I, Zone 1, or Class I, Zone 2, and is not suitable for Class I,
Zone 0 or Class I, Division 1, "Hazardous (Classified) Locations".
8. No revision to drawing without prior FM / CSA Approval.
9. Simple Apparatus is defined as a device that neither generates
nor stores more than 1.5 V, 0.1 A or 25 mW.
10. The termination must be NRTL-approved, and the resistor must
be infallible.
11. Warning:
For applications in Div. 2 or Zone 2 (Classified Locations) Explosion
hazard: Except for nonincendive field circuits, do not disconnect
the apparatus unless the area is known to be non hazardous.
12. Warning:
Substitution of Components May Impair Safety.
2/06
2/06
STT17F Smart Temperature Transmitter Operator Manual
Installation Drawings
®
(ANSI/
31
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