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.
The 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(-)
and contacts 1(+), 2(-))
direct voltage U = 20 V – 35 V; approx. 7 W
maximum voltage U m = 253 V AC resp.
U m = 125 V DC
(terminals 40, 41, 42, 55, 56, 57 and contacts 3, 5)
for connection to an IEC61158-2 interface
maximum voltage U m = 60 V
KFD2-BR*-EX*.*** and KLD2-PL*-EX*.***
for connection to a serial interface RS485
Additional electrical data see: EQUIPMENT (continued)
(terminals 3, 18(+)
and 2, 17(-))
in type of protection “Intrinsic Safety” Ex ia IIC /IIB
U o = 15 V
I o = 207,2 mA
P o = 1,93 W
R i = 190,4 Ω
output characteristic trapezoidal
for connection to fieldbus-systems according to the FISCO-model with the following characteristics:
All 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:
L i ≤ 10 µH
C i ≤ 5 nF
The line used for the fieldbus must keep the following ranges with regard to it's reactances per unit length:
R’ = 15…150 Ω/km (loop resistance)
L’ = 0,4…1 mH/km
C’ = 80…200 nF/km (incl. a possibly existing shield),
C’ = C’strand/strand +0,5xC’strand/shield (if the bus circuit is floating)
C’ = C’strand/strand +C’strand/shield
(if the shield is connected to one pole of the supply unit)
A 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.
If the conditions mentioned are met, the maximum line length up to 1000 m is not limited with respect to safety technology.
(terminal 1, 16)
Only for connection to the line's shield or the equipotential bonding respectively.
The 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.