Pepperl+Fuchs KFD2-STC4-EX1 (P.N. 122580) Technical Specifications

1. General Information

• Manufacturer: Pepperl+Fuchs

• Model: KFD2-STC4-EX1

• Part Number: 122580

• Type: Signal conditioner/isolator with intrinsic safety (Ex) protection

• Primary Use: Signal conversion and isolation for temperature sensors (RTD/thermocouple) in hazardous areas

2. Certifications & Approvals

• Hazardous Area Certifications:

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

  • FM Approval: Class I, II, III, Division 1

  • CSA: Class I, Zone 0

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

3. Electrical Characteristics

• Input Types:

  • RTD: Pt100, Pt200, Pt500, Ni100, Cu10

  • Thermocouples: Types J, K, S, R, T, B, N, E

  • Voltage: 0-10V, 0-5V

  • Current: 0-20mA, 4-20mA

• Output Signal: 4-20mA (active/passive configurable)

• Power Supply: 20-30V DC (24V typical)

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

• Accuracy: ±0.1% of span (RTD/thermocouple)

4. Environmental Specifications

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

• Storage Temperature: -40°C to +85°C

• Humidity: 0-95% non-condensing

• Protection Rating: IP20 (for panel mounting)

5. Mechanical Specifications

• Housing Material: Polycarbonate

• Dimensions: 17.5 x 116 x 121.5 mm (WxHxD)

• Mounting: DIN rail (35mm)

• Weight: Approx. 150g

6. Configuration & Indicators

• Configuration: DIP switches for input type selection

• LED Indicators:

  • Green: Power ON

  • Yellow: Signal transmission

  • Red: Fault condition

7. Ordering Information

• Lead Time: Typically 2-4 weeks (standard)

• Alternative Models:

  • KFD2-STC4-EX2 (P.N. 132952) – Enhanced version

  • KFD2-STC4-EX1.W (P.N. 122581) – Special variant

8. Typical Applications

• Temperature monitoring in hazardous areas

• Process control in oil & gas facilities

• Chemical and pharmaceutical plants

• Power generation systems

Pepperl+Fuchs, KFD2-STC4-EX1,

• Type: 1-channel isolated barrier (SMART Transmitter Power Supply)
• Power Supply: 24 V DC (Power Rail)
• Input:
  • 2-wire and 3-wire SMART transmitters
  • 2-wire SMART current sources
• Output: 0/4 mA … 20 mA
• Test Points: Terminals with test points
• Safety Integrity Level (SIL): SIL 2 (according to IEC/EN 61508)
• HART Communication: Yes
• Housing Width: 20 mm
• Channels: 1-channel
• Rated Voltage: 20 … 35 V DC
• Field Device Compatibility:
  • 2-wire transmitter
  • 3-wire transmitter
  • Current source

DATASHEET:Pepperl+Fuchs MODEL KFD2-STC4-EX1