1. General Information

• Manufacturer: Pepperl+Fuchs

• Model: KFD0-SD2-EX1.1180

• Part Number: 133239

• Type: Signal isolator/barrier with Ex-i protection

• Primary Function: Converts and isolates frequency or pulse signals (e.g., from flow meters, tachometers) for use in hazardous zones (Zone 1/21).

2. Certifications & Safety Approvals

• Hazardous Area Certifications:

  • ATEX/IECEx: Ex ia IIC T6 Ga (Gas) / Ex ia IIIC T85°C Da (Dust)

  • FM/CSA: Class I, Division 1 / Zone 0

• Safety Standards: Compliant with IEC 61508 (SIL 2/3 capable)

3. Electrical Specifications

• Input Signal:

  • Frequency/Pulse: Configurable ranges (e.g., 0–10 kHz)

  • Voltage: Typically 0–30V (adjustable thresholds)

• Output Signal:

  • 4–20 mA (isolated, linear to input frequency)

  • Relay (optional): SPDT contact

• Power Supply: 20–30V DC (typically 24V)

• Isolation: 1500V AC (input/output/power)

• Accuracy: ±0.1% of span

4. Environmental & Mechanical Specifications

• Operating Temperature: -20°C to +60°C

• Protection Rating: IP20 (for control cabinets)

• Housing: Compact, DIN-rail mountable (width: 12.5 mm)

• Connections: Screw terminals

5. Configuration & Indicators

• DIP Switches: Configurable for input type (frequency/voltage), range, and output mode.

• LED Indicators:

  • Green: Power ON

  • Yellow: Signal active

  • Red: Fault/error

6. Applications

• Flow measurement (e.g., turbine meters, magnetic flow sensors)

• Speed monitoring (e.g., tachometers in Ex zones)

• Process automation in oil & gas, chemical, or water treatment plants.