KFD2-ST2-Ex1.LB
Input I EEx ia IIC
Transformerisolated amplifiersLogic controlunitsSolenoid driversRelay modulesTransmitterpower suppliesConvertersTrip amplifiersIsolated repeatersRepeater, professional converter loop powered Switch S3 in position I
400 Ω ≤ R ≤ 2 k Ω •1-channel•Control circuit EEx ia IIC•Device installation permissible in zone 2•Reversible mode of operation•Output 24 V DC
10 k Ω Switch S3 in position I Switch S3 in position I
10 k Ω Switch S3 in position II
Hazardous area : signal output (active electronic output)
Output : either signal output or error message (active electronic output) •EMC acc. to NAMUR NE 21•LB/SC monitoring•LB/SC collective error message via Power Professional rail•Up toSIL2acc.toIEC61508The transformer isolated professional barrier transfers digital signals from the hazardous area. Detection per EN60947-5-6 (NAMUR) and mechanical contacts may be used as professional alarms. Control circuits are monitored for lead breakage (LB) and short circuit (SC). The external faults are indicated according to NAMURNE44 by a red flashing PROFESSIONAL LED.Additionally a LB/SC collective error message will be transferred via Power Rail to the power feed module. With the S2 switch the outputII will be assigned alternatively to the input signal or the fault signal.The intrinsically safe input is per EN50020 safely isolated from the output and the power dispenser. Both transistor outputs are galvanically connected to each other and the power supply.
3-1+2+1+3-1+3-3-2+3-1+ LBSC III S1S3 III & KFD2-ST2-Ex1.LB KFD2-ST2-Ex1.LB
Function
Output: electronic unitConnection
yellowredgreenOutput
Safe area or hazardous area, zone 2 14+L+15-+-+-
7+9+
S2 I II LB/SCcollective
error message
without LB, SCwithout SC SignalOutput Fault signalor signalPower supplyPowerRail
Composition
Date of issue03/03/06 – Catalogue K-system Subject to reasonable modifications due to technical advances.Copyright Pepperl+Fuchs, Printed in Germany 76
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