Pepperl Fuchs KFD2-SR2-Ex2.W Switch Amplifier (203355)

The P&F KFD2-SR2-Ex2.W is a 2-channel intrinsically safe switch amplifier designed to safely transmit digital signals from NAMUR sensors or dry contacts in hazardous areas to relay outputs in safe zones.

Featuring reversible logic, integrated line fault detection, dual relay outputs, and Power Rail support for collective error messaging, the unit is certified up to SIL 2 (SC 3) for dependable use in process automation environments.

Technical Specifications

Model: KFD2-SR2-Ex2.W
Type: Intrinsically Safe Switch Amplifier
Input Type: NAMUR sensor or dry contact
Output Type: Relay contact output
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. 8 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 mA
• Pulse/Pause Ratio: Min. 20 ms

Output Specifications

• Output Terminals: I: 7, 8, 9 | II: 10, 11, 12
• Output Type: Relay contact
• Contact Rating:
  • 250 V AC / 2 A (cos φ > 0.75)
  • 126.5 V AC / 4 A (cos φ > 0.75)
  • 40 V DC / 2 A resistive
• Minimum Switching Current: 2 mA @ 24 V DC
• Switching Delay: Approx. 20 ms (On/Off)
• Mechanical Life: 10⁷ switching cycles

Power & Configuration

• Supply Voltage: 19 … 30 V DC
• Rated Current: ≤ 50 mA
• Power Dissipation: ≤ 1 W
• 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: Reinforced (300 Veff)
• Output/Output: Reinforced (300 Veff)

Environmental & Mechanical

• Operating Temperature: -40 … 70 °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 (1)G [Ex ia Ga] IIC / II (1)D [Ex ia Da] IIIC / I (M1) [Ex ia Ma] I
• IECEx Marking: Ex ia Ga IIC / Ex ia Da IIIC / Ex ia Ma I / Ex ec nC IIC T4 Gc
• FM/UL Approval: Yes (FM19US0207X, UL E106378)
• Certificates: PTB 00 ATEX 2080, TÜV 99 ATEX 1493 X, IECEx PTB 11.0034, IECEx TUN 19.0013X
• Max Safe Voltage (Um): 253 V AC / 125 V DC (signal), 40 V DC (fault)

Key Features & Benefits

✅ Dual Channel Monitoring: Independent signal channels for increased flexibility.

✅ Relay Fault Output: Reliable detection and signaling of abnormal conditions.

✅ Power Rail Enabled: Supports collective error messaging and modular setup.

✅ Certified SIL 2 Safety: IEC/EN 61508 compliant for critical safety applications.

✅ LED Status Indicators: Visual feedback aligned with NAMUR NE 44 diagnostics.

📦 Buy Pepperl+Fuchs KFD2-SR2-Ex2.W from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable KFD2-SR2-Ex2.W prices.

Delivers safe, dual-channel signal transfer with configurable logic, line fault detection, and relay outputs—perfect for hazardous area installations.

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

Contact us to place your order today.