Pepperl+Fuchs KFD2-SR2-EX1.W.LB | Relay | Ex ia | SIL2 | LFD | DIN Rail

Pepperl+Fuchs KFD2-SR2-EX1.W.LB | 1-Channel Relay, NAMUR Input, Ex ia, SIL2, Line Fault Detection

Overview:

The Pepperl+Fuchs KFD2-SR2-EX1.W.LB (Part No. 203351) is a 1-channel isolated signal relay designed for NAMUR sensors or dry contacts in hazardous areas. It features Ex ia intrinsic safety, SIL2 compliance, and Line Fault Detection (LFD), ensuring safe signal processing and system integrity in critical control environments.

Key Features:

• Input Type: NAMUR sensor or dry contact

• Output: 1 SPDT relay contact

• Mounting Type: DIN rail (35 mm)

• Power Supply: 20–30 VDC (via terminals or Power Rail)

• Relay Rating: 250 V AC / 2 A

• Safety Level: SIL2 (IEC 61508)

• Ex Protection: Ex ia IIC certified

• Line Fault Detection: Monitors for open/short circuits on the input

• LED Indicators: Status, power, and fault

• Housing Width: 12.5 mm

Technical Specifications:

• Model Number: KFD2-SR2-EX1.W.LB

• Part Number: 203351

• Switching Voltage: Max. 253 V AC / 125 V DC

• Switching Current: Max. 2 A

• Voltage Drop: Minimal for loop integrity

• Current Consumption: ~30 mA

• Operating Temp: -20°C to +60°C

• Housing Material: Polyamide

• Dimensions: 12.5 x 119 x 114.5 mm

• Weight: Approx. 150 g

Applications:

• Oil & Gas: Safe relay output from field sensors

• Chemical Plants: Intrinsically safe signal routing with diagnostics

• Pharma & Process Control: Monitor NAMUR signals with fault detection

• Water Treatment: High-reliability interface from Ex zones

• SIL2 Systems: Functional safety compliance in automation networks

Why Choose the KFD2-SR2-EX1.W.LB?

✅ Line Fault Detection (LFD) for proactive system monitoring
✅ SIL2 certified for safety-critical applications
✅ Compact 12.5 mm DIN rail housing
✅ Ex ia certified for hazardous zone operation
✅ Reliable relay switching with 3-way isolation

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Available and ships worldwide. 

NEW product in original sealed packaging. The product may be of older version or design. The packaging may have markings, signs of discoloration, and wear. DDPARTSSOLUTION Warranty: 1 Year. Manufacturer's Warranty and Support NEVER apply