This certificate is issued as verification that a sample(s), representative of production, was assessed and tested and found to comply with the IEC Standard list below and that the manufacturer's quality system, relating to the Ex products covered by this certificate, was assessed and found to comply with the IECEx Quality system requirements. This certificate is granted subject to the conditions as set out in IECEx Scheme Rules, IECEx 02 and Operational Documents as amended.
This Unit verification certificate is issued as verification that the Apparatus identified on page 1, was assessed and tested and found to comply with the IEC Standard list below. This certificate is granted subject to the conditions as set out in IECEx Scheme Rules, IECEx 02 and Operational Documents as amended.
The electrical apparatus and any acceptable variations to it specified in the schedule of this certificate and the identified documents, was found to comply with the following standards:
As this is a Unit Verification Certificate, no QAR is applicable as this certificate is specific to the items listed by serial number or other unique identification.
segment coupler type KFD2-BR*-EX*.***, KLD2-PL*-EX*.***, KLD2-PR*-Ex*.IEC1
are used as associated apparatus for the supply of intrinsically safe electrical apparatus and for the
transmission of electrical signals from the explosion hazardous area to the non
explosion hazardous area and vice versa. The intrinsically safe output circuit corresponds
to the FISCO model. The maximum permissible ambient temperature is 60°C.
(terminals 59(+), 60(-)
contacts 1(+), 2(-))
voltage U = 20 V – 35 V; approx. 7 W
voltage U m = 253 V AC resp.
m = 125 V DC
40, 41, 42, 55, 56, 57 and contacts 3, 5)
connection to an IEC61158-2 interface
voltage U m = 60 V
connection to a serial interface RS485
electrical data see: EQUIPMENT
(terminals 3, 18(+)
and 2, 17(-))
type of protection “Intrinsic Safety” Ex ia IIC /IIB
= 15 V
= 207,2 mA
= 1,93 W
i = 190,4 Ω
connection to fieldbus-systems according to the FISCO-model with the
apparatus connected to the output circuit (fieldbus) must act as passive
current sink (non-feeding). The effective internal capacitance and inductance of each
apparatus must keep the following limits:
C i ≤ 5 nF
line used for the fieldbus must keep the following ranges with regard to it’s
reactances per unit length:
= 15…150 Ω/km (loop resistance)
= 0,4…1 mH/km
= 80…200 nF/km (incl. a possibly existing shield),
= C’strand/strand +0,5xC’strand/shield (if the bus circuit is
= C’strand/strand +C’strand/shield
the shield is connected to one pole of the supply unit)
terminator, consisting of a capacitor up to 2,2 µF (incl. tolerance) in series to a resistor
of 90…100 Ω,
is permissible at the end of the line. This requires a separate examination
certificate as a rule.
the conditions mentioned are met, the maximum line length up to 1000 m is not
limited with respect to safety technology.
for connection to the line’s shield or the equipotential bonding
intrinsically safe output circuit
is safely electrically
isolated from the mains circuit as well as the data circuit up to a peak
value of the nominal voltage of 375 V.