OVERVIEW

Official designation: Pepperl+Fuchs KFD2-UFC-1.D (K-System, Frequency Converter)

Role/Application: This universal 1-channel signal conditioner converts digital frequency inputs from NAMUR sensors or dry contacts into a proportional 0/4 to 20 mA analog output, offering galvanic isolation and trip alarm functions.

KEY SPECS SUMMARY

Power: 20 to 30 V DC (approximate current 100 mA)

Interfaces / Ports: One digital input, one analog output, two relay outputs

Indicators: Keypad, LC display, three LEDs (Power, Input pulses/Fault, Output I to III)

Operating Temp: -20 to 60 degrees C

Platform / Compatibility: NAMUR/dry contacts, PACTware configurable, DIN rail mounting

Limit: Input frequency 0.001 to 10000 Hz, SIL 2 certified

Lifecycle: Refer to the latest manufacturer manual.

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the maximum analog load resistance for the 0/4 to 20 mA current output?

A: The maximum load resistance for the analog current output is 650 Ohm.

Wiring & Installation:

Q: Which terminals are used for connecting the 24 V DC power supply?

A: The 24 V DC supply connects to terminals 23+ and 24- or via the Power Rail.

Troubleshooting & Compatibility:

Q: What does the LED indicating input pulses and fault signal show?

A: This LED is yellow for input pulses and red to indicate an input line fault (LFD).

Replacement & Upgrades:

Q: Can the converter function as a trip alarm using its outputs?

A: Yes, the module includes two relay outputs and one electronic output configurable for high/low alarm trip values.