Pepperl Fuchs KFD2-SR2-Ex1.W.LB Switch Amplifier (203351)
The P&F KFD2-SR2-Ex1.W.LB is a 1-channel intrinsically safe switch amplifier with dual relay outputs and line fault detection, designed for transferring digital signals from NAMUR sensors or dry contacts in hazardous areas to safe-zone control systems.
Featuring reversible logic, collective error signaling via Power Rail, and DIP switch configuration, this device is certified up to SIL 2 (SC 3) and ideal for high-reliability applications in process automation.
Technical Specifications
Model: KFD2-SR2-Ex1.W.LB
Type: Intrinsically Safe Switch Amplifier
Input Type: NAMUR sensor or dry contact
Output Type: Dual relay contact outputs (signal & fault)
Channels: 1
Mounting: 35 mm DIN rail (EN 60715)
Input Specifications
- Connection Terminals: 1+, 2+, 3-
- 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 (signal + fault)
- 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: ≤ 45 mA
- Power Dissipation: ≤ 0.9 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 Relay Output: Handles signal and fault outputs separately.
✅ Power Rail Ready: Enables collective fault messaging via DIN rail.
✅ Safe Isolation: Reinforced galvanic separation across all interfaces.
✅ SIL 2 Functional Safety: Certified for safety-critical applications.
✅ Compact Design: Fits standard DIN rail enclosures for efficient wiring.
📦 Buy Pepperl+Fuchs KFD2-SR2-Ex1.W.LB from Drive Outlet Megastore
At Drive Outlet Megastore we offer unbeatable KFD2-SR2-Ex1.W.LB prices.
Delivers safe, redundant signal transfer with dual outputs and built-in fault monitoring. It’s ideal for interfacing NAMUR sensors in Ex zones while maintaining safe zone integrity.
In stock now and available with 2–3 days delivery.
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