Configured for discrete signal transfer and line fault detection in intrinsically safe control loops, the Pepperl+Fuchs KFD2-SR2-Ex1-W.LB (KFD2-SR2-Ex1-W.LB Switch Amplifier) provides direct physical/electrical execution.

Technical Performance Matrix

Intrinsic Safety and Surge Voltage Protection Limits

The device operates as a galvanically isolated intrinsic safety (Ex i) barrier certified for hazardous location deployment (up to Ex ia IIC). It isolates binary field signals from NAMUR proximity sensors or mechanical switches located in Zone 0, 1, or 2 environments. Integrated energy-limiting circuitry limits voltage and current surges entering hazardous zones, preventing electrical sparks under fault conditions. Safe galvanic isolation withstands peak test voltages up to 375 V between the field input, relay output, and power supply networks.

Installation Guidelines

Mechanical Mounting

• Snap the housing vertically onto a standard 35 mm DIN mounting rail (EN 60079-15) or position directly onto an integrated Power Rail system.
• Maintain a clearance of at least 50 mm above and below the module housing to allow adequate air circulation.

Wiring and Shielding

• Maintain strict 50 mm physical separation between intrinsically safe blue terminal circuits and non-intrinsically safe power/relay field wiring.
• Connect NAMUR field sensors using twisted-pair shielded cabling. Connect cable shields to a designated earth ground bar at the enclosure cabinet entry point.

Ordering Information

• Order Code: KFD2-SR2-Ex1-W.LB
• Included Items: 1x KFD2-SR2-Ex1-W.LB Switch Amplifier module, removable screw terminal connectors, quick installation instruction guide.
• Optional Accessories: Power Rail system UPR-03, Power Feed Module KFD2-EB2.

Logistics Specifications

• Delivery time: 3-5 days when payment finish
• Fast dispatch via DHL, FEDEX, or UPS international freight
• Shipped in reinforced anti-static industrial packaging with ESD protection

Frequently Asked Questions

Q: How is line fault detection (LFD) configured on the KFD2-SR2-Ex1-W.LB? A: Line fault detection for lead breakage and short-circuit conditions is selected using DIP switches located on the front panel of the housing.

Q: Can mechanical switch contacts be connected directly to the input terminals? A: Yes, simple mechanical contacts can be connected. When line fault detection is enabled, external resistors must be installed across the switch contact to enable loop monitoring.

Q: What power options exist for powering the module? A: The module accepts 24 VDC auxiliary power either directly through terminal connections 14+ and 15- or via the DIN-rail mounted Power Rail system bus.

Q: What is the maximum switching frequency of the relay output? A: The SPDT relay output operates at a maximum switching frequency of 10 Hz due to mechanical contact transition constraints.