Pepperl Fuchs KFD2-SR3-Ex2.2S Switch Amplifier (262112)

The P&F KFD2-SR3-Ex2.2S is a 2-channel intrinsically safe switch amplifier that transfers digital signals from NAMUR sensors or dry contacts in hazardous zones to safe area relay outputs. Designed with advanced AND logic, this unit provides two relay outputs per input and supports signal splitting for parallel control tasks.

With built-in line fault detection, reversible operation, and collective fault output via Power Rail, this SIL 2 certified barrier ensures optimal safety and diagnostics in process automation environments.

Technical Specifications

Model: KFD2-SR3-Ex2.2S
Type: Intrinsically Safe Switch Amplifier
Input Type: NAMUR sensor or dry contact
Output Type: 4 x relay contact outputs (2 per channel)
Channels: 2
Mounting: 35 mm DIN rail (EN 60715)

Input Specifications

• Connection Terminals: 1+, 2+, 3-; 4+, 5+, 6-
• Standard: EN 60947-5-6 (NAMUR)
• Open Circuit Voltage: Approx. 10 V DC
• Short-Circuit Current: Approx. 8 mA
• Switching Point: 1.2 … 2.1 mA
• Hysteresis: Approx. 0.2 mA
• Line Fault Detection: Break ≤ 0.1 mA, Short ≥ 6.5 mA
• Pulse/Pause Ratio: Min. 20 ms

Output Specifications

• Output Terminals: I: 7,8 | II: 8,9 | III: 10,11 | IV: 11,12
• Output Type: Relay contact (channel 1 & 2)
• Contact Rating:
  • 48 V AC / 1 A (cos φ > 0.7)
  • 40 V DC / 1 A resistive
• Minimum Switching Current: 1 mA @ 24 V DC
• Switching Delay: Approx. 20 ms (On/Off)
• Mechanical Life: 10⁸ switching cycles

Power & Configuration

• Supply Voltage: 19 … 30 V DC
• Rated Current: 20 … 30 mA
• Power Consumption: < 600 mW
• Power Rail Support: Yes
• Visual Indicators: LEDs (NAMUR NE 44)
• Configuration: DIP switch configurable

Galvanic Isolation

• Input/Output: Reinforced (300 Veff)
• Input/Power Supply: Reinforced (300 Veff)
• Output/Power Supply: Basic insulation 32 Veff / Functional 50 Veff
• Output/Output: Basic insulation 32 Veff / Functional 50 Veff

Environmental & Mechanical

• Operating Temperature: -20 … 60 °C
• Degree of Protection: IP20
• Connection: Screw terminals
• Dimensions: 20 x 119 x 115 mm (W x H x D)
• Weight: Approx. 150 g

Certifications & Safety

• SIL Rating: SIL 2 (SC 3) per IEC/EN 61508
• ATEX Marking: II 3(1)G Ex nA nC [ia Ga] IIC T4 Gc / II (1)D [Ex ia Da] IIIC / I (M1) [Ex ia Ma] I
• IECEx Marking: Ex nA nC [ia Ga] IIC T4 Gc / [Ex ia Da] IIIC / [Ex ia Ma] I
• Certificates: EXA 16 ATEX 0001 X, IECEx EXA 16.0001X
• FM/UL Approval: Yes (UL E106378)
• Max Safe Voltage (Um): 250 V AC

Key Features & Benefits

✅ Signal Splitting: One input can drive two outputs with AND logic.

✅ 4 Relay Outputs: Dual outputs per channel for parallel control tasks.

✅ Power Rail Enabled: Collective fault output and modular install.

✅ SIL 2 Safety: IEC/EN 61508 certification for critical environments.

✅ Extended Life: 100 million switching cycles for long-term reliability.

📦 Buy Pepperl+Fuchs KFD2-SR3-Ex2.2S from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable KFD2-SR3-Ex2.2S prices.

Supports 2-channel signal isolation with 4 relay outputs and built-in diagnostics—perfect for high-integrity hazardous area installations.

In stock now and available with 2–3 days delivery.

Contact us to place your order today.