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  • Frequency Converter KFU8-UFC Pepperl Fuchs
Frequency Converter KFU8-UFC Pepperl Fuchs

Frequency Converter KFU8-UFC Pepperl Fuchs

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FREQUENCY CONVERTER KFU8-UFC
  • 1-channel isolated barrier
  • Universal usage at different power supplies
  • Input for NAMUR sensors or dry contacts
  • Input frequency 1 mHz ... 5 kHz
  • Current output 0/4 mA ... 20 mA
  • Relay contact and transistor output
  • Start-up override
  • Line fault detection (LFD)
  • Up to SIL 2 acc. to IEC 61508/IEC 61511

    • Product Description
    48 V AC ... 253 V AC/20 V DC ... 90 V DC
    General specifications
    Signal typeDigital Input
    Functional safety related parameters
    Safety Integrity Level (SIL)SIL 2
    Supply
    Connectionterminals 23, 24
    Rated voltage20 ... 90 V DC / 48 ... 253 V AC 50 ... 60 Hz
    Power dissipation/power consumption≤ 2 W ; 2.5 VA / 2.2 W ; 3 VA
    Interface
    Programming interfaceprogramming socket
    Input
    Connection sidefield side
    ConnectionInput I: intrinsically safe: terminals 1+, 3- 
    Input II: non-intrinsically safe: terminals 13+, 14-
    Input Isensor acc. to EN 60947-5-6 (NAMUR) or mechanical contact
    Pulse duration> 50 µs
    Input frequency0.001 ... 5000 Hz
    Line fault detectionbreakage I ≤ 0.15 mA; short-circuit I > 6.5 mA
    Input IIstartup override: 1 ... 1000 s, adjustable in steps of 1 s
    Active/PassiveI > 4 mA (for min. 100 ms) / I < 1.5 mA
    Open circuit voltage/short-circuit current18 V / 5 mA
    Output
    Connection sidecontrol side
    Connectionoutput I: terminals 10, 11, 12
    output II: terminals 16, 17, 18
    outout III: terminasl 19+, 20-
    output IV: terminals 8+, 7-
    Output I, IIsignal, relay
    Contact loading250 V AC / 2 A / cos φ ≥ 0.7 ; 40 V DC / 2 A
    Mechanical life5 x 107 switching cycles
    Energized/De-energized delayapprox. 20 ms / approx. 20 ms
    Output IIIelectronic output, passive
    Contact loading40 V DC
    Signal level1-signal: (L+) - 2.5 V (50 mA, short-circuit/overload proof) 
    0-signal: switched off (off-state current ≤ 10 µA)
    Output IVanalog
    Current range0 ... 20 mA or 4 ... 20 mA
    Open loop voltagemax. 24 V DC
    Loadmax. 650 Ω
    Fault signaldownscale I ≤ 3.6 mA , upscale ≥ 21.5 mA (acc. NAMUR NE43)
    Transfer characteristics
    Input I
    Measurement range0.001 ... 5000 Hz
    Resolution0.1 % of the measurement value , ≥ 0.001 Hz
    Accuracy0.1 % of the measurement value , > 0.001 Hz
    Measuring time< 100 ms
    Influence of ambient temperature0.003 %/K (30 ppm)
    Output I, II
    Response delay≤ 200 ms
    Output IV
    Resolution< 10 µA
    Accuracy< 20 µA
    Influence of ambient temperature0.005 %/K (50 ppm)