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LERBAKKEN 10, 8410 RØNDE DENMARK.
Installation notes:
FM / CSA:
For installation in the US the 5350 shall be installed according to the National Electrical
Code (ANSI-NFPA 70).
For installation in Canada the transmitter shall be installed in a suitable enclosure to meet
installation codes stipulated in the Canadian Electrical Code (CEC).
The entity concept:
Equipment that is FM / CSA-approved for intrinsic safety may be connected to barriers
based on the ENTITY CONCEPT. This concept permits interconnection of approved
transmitters, meters and other devices in combinations which have not been specifically
examined by FM / CSA, provided that the agency's criteria are met. The combination is
intrinsically safe, if the entity concept is acceptable to the authority having jurisdiction over
the installation.
The entity concept criteria are as follows:
The intrinsically safe devices, other than barriers, must not be a source of power.
The maximum voltage Ui (V
which the device can receive and remain intrinsically safe, must be equal to or greater
than the voltage (Uo or V
be delivered by the barrier.
The sum of the maximum unprotected capacitance (C
the interconnecting wiring must be less than the capacitance (C
connected to the barrier.
The sum of the maximum unprotected inductance (L
interconnecting wiring must be less than the inductance (L
connected to the barrier.
The entity parameters Uo,V
by the barrier manufacturer.
FISCO/FNICO rules:
The FISCO Concept allows the interconnection of intrinsically safe apparatus to
associated apparatus not specifically examined in such combination. The criterion for such
interconnection is that the voltage (Vmax), the current (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, Voc, Vt), the current (Io, Isc, It,) and the
power (Po) which can be provided by the associated apparatus (supply unit). In addition,
the maximum unprotected residual capacitance (Ci) and inductance (Li) of each apparatus
(other than the terminators) connected to the Fieldbus must be less than or equal to:
FISCO: 5 nF and 10 H.
FNICO: 5 nF and 20 H
Revision date:
2015-10-27
) and current Ii (I
MAX
MAX
or V
) and current (Io or I
OC
t
or V
and Io,I
or I
OC
t
SC
Version /Revision
V4/R0
5350V113-DE
WWW.PRELECTRONICS.COM
), and maximum power Pi (Pmax),
or I
) and the power Po which can
SC
t
) for each intrinsically device and
i
) which can be safely
a
) for each intrinsically device and the
i
) which can be safely
a
, and C
and L
for barriers are provided
t
a
a
5350QFC01
V2R0
5350QE01
Page:
7/15
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