Pepperl+Fuchs KFU8-UFC-Ex1.D Frequency Converter with Trip Values KFU8-UFC-Ex1.D Safety Barriers



 

Frequency Converter with Trip Values KFU8-UFC-Ex1.D

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

 

 

 

Function of Pepperl+Fuchs KFU8-UFC-Ex1.D Frequency Converter with Trip Values KFU8-UFC-Ex1.D Safety Barriers
 

*   This isolated barrier is used for intrinsic safety applications.

*   The device is a universal frequency converter that changes a digital input signal into a proportional free adjustable 0/4 mA ... 20 mA analog output

signal and functions as a switch amplifier and a trip alarm.

*   The functions of the switch outputs (2 relay outputs and 1 potential free transistor output) are easily adjustable [trip value display (min/max alarm),

serially switched output, pulse divider output, error signal output.

*   The device is easily configured by the use of keypad or with the PACTware configuration software.

*   A fault is signalized by LEDs acc. to NAMUR NE44.

 

 

 

 

Technical data of Pepperl+Fuchs KFU8-UFC-Ex1.D Frequency Converter with Trip Values KFU8-UFC-Ex1.D Safety Barriers
 

Product Description of Pepperl+Fuchs KFU8-UFC-Ex1.D Frequency Converter with Trip Values KFU8-UFC-Ex1.D Safety Barriers
 

48 V AC ... 253 V AC/20 V DC ... 90 V DC
 

General specifications of Pepperl+Fuchs KFU8-UFC-Ex1.D Frequency Converter with Trip Values KFU8-UFC-Ex1.D Safety Barriers
 

Signal type Digital Input

Functional safety related parameters

Safety Integrity Level (SIL) SIL 2
 

Supply of Pepperl+Fuchs KFU8-UFC-Ex1.D Frequency Converter with Trip Values KFU8-UFC-Ex1.D Safety Barriers
 

Connection terminals 23, 24

Rated voltage 20 ... 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 interface programming socket
 

Input of Pepperl+Fuchs KFU8-UFC-Ex1.D Frequency Converter with Trip Values KFU8-UFC-Ex1.D Safety Barriers
 

Connection side field side

Connection Input I: intrinsically safe: terminals 1+, 3-

Input II: non-intrinsically safe: terminals 13+, 14-

Input I sensor acc. to EN 60947-5-6 (NAMUR) or mechanical contact

Pulse duration > 50 µs

Input frequency 0.001 ... 5000 Hz

Line fault detection breakage I ≤ 0.15 mA; short-circuit I > 6.5 mA

Input II startup override: 1 ... 1000 s, adjustable in steps of 1 s

Active/Passive I > 4 mA (for min. 100 ms) / I < 1.5 mA

Open circuit voltage/short-circuit current 18 V / 5 mA
 

Output of Pepperl+Fuchs KFU8-UFC-Ex1.D Frequency Converter with Trip Values KFU8-UFC-Ex1.D Safety Barriers
 

Connection side control side

Connection output I: terminals 10, 11, 12

output II: terminals 16, 17, 18

outout III: terminasl 19+, 20-

output IV: terminals 8+, 7-

Output I, II signal, relay

Contact loading 250 V AC / 2 A / cos φ ≥ 0.7 ; 40 V DC / 2 A

Mechanical life 5 x 107 switching cycles

Energized/De-energized delay approx. 20 ms / approx. 20 ms

Output III electronic output, passive

Contact loading 40 V DC

Signal level 1-signal: (L+) - 2.5 V (50 mA, short-circuit/overload proof)

0-signal: switched off (off-state current ≤ 10 µA)

Output IV analog

Current range 0 ... 20 mA or 4 ... 20 mA

Open loop voltage max. 24 V DC

Load max. 650 Ω

Fault signal downscale I ≤ 3.6 mA , upscale ≥ 21.5 mA (acc. NAMUR NE43)
 

Transfer characteristics of Pepperl+Fuchs KFU8-UFC-Ex1.D Frequency Converter with Trip Values KFU8-UFC-Ex1.D Safety Barriers
 

Input I

Measurement range 0.001 ... 5000 Hz

Resolution 0.1 % of the measurement value , ≥ 0.001 Hz

Accuracy 0.1 % of the measurement value , > 0.001 Hz

Measuring time < 100 ms

Influence of ambient temperature 0.003 %/K (30 ppm)

Output I, II

Response delay ≤ 200 ms

Output IV

Resolution < 10 µA

Accuracy < 20 µA

Influence of ambient temperature 0.005 %/K (50 ppm)