Pepperl+Fuchs K-LB-1.30 Lightning Protector | SIL3 Non-Grounded Barrier

Product Profile: K-LB-1.30 Surge Protection

The Pepperl+Fuchs K-LB-1.30 is a robust, single-channel surge protection barrier designed to safeguard critical control loops from voltage transients caused by lightning strikes or industrial switching operations. Featuring a non-grounded (floating) topology, this 30V-rated module is the preferred solution for preventing common-mode interference in sensitive instrumentation networks. It remains fully HART transparent, ensuring seamless integration into existing control logic.

Technical Performance Matrix

• Model Number: K-LB-1.30
• Channel Configuration: 1-channel (2-line protection)
• Topology: Non-grounded (Floating)
• Surge Capacity: 20 kA (8/20 µs) total discharge
• Safety Integrity: SIL 3 certified (IEC/EN 61508)
• Voltage Rating: 24V Nominal / 30V Max Operating
• Internal Resistance: < 0.5 Ω per line (Minimal signal drop)
• Environmental: IP20 rating; -30 °C to +80 °C operating range

Global PLC Spare HUB Insight

Our engineering team selects the K-LB-1.30 when signal loop isolation is paramount. Because this barrier utilizes a non-grounded topology, it provides an additional layer of defense against ground-loop currents that can corrupt measurement data in large-scale refinery or power plant architectures. It is the ideal choice for high-precision pressure, temperature, and analytical transmitters requiring peak signal integrity alongside robust transient protection.

Diagnostics & Operational Installation

The K-LB-1.30 is designed for rapid deployment on standard 35 mm DIN rails. The front-facing labeling surface allows for easy loop identification during commissioning. The module includes an auto-reset mechanism with a < 30ms response time, effectively mitigating surges without requiring manual intervention. We recommend pairing this with high-integrity field ground systems to maximize its effective protection radius.

Logistics and Warranty Excellence

• Warranty: 12-month standard quality guarantee.
• Shipping: Worldwide dispatch via FedEx, UPS, or DHL.
• Turnaround: Expedited handling within 24–48 hours of order verification.

Expert FAQs and Selection Guidance

Q: Why choose the K-LB-1.30 non-grounded version over a grounded model?
A: The non-grounded (floating) topology is critical when your control system architecture must maintain electrical isolation from the field-side earth plane to prevent noise induction.

Q: Is the K-LB-1.30 compatible with low-voltage logic circuits?
A: Absolutely; it is designed for 24V nominal systems and safely handles the standard voltage fluctuations found in most process control loops.

Q: What is the benefit of the < 30ms impulse reset time?
A: This ensures that the surge protection circuit recovers almost instantaneously after a transient event, minimizing the risk of "blind spots" in your data acquisition.

Q: Can this barrier be used in explosive environments?
A: Yes, the K-LB-1.30 holds ATEX and IECEx certifications for use in hazardous areas, provided that local installation guidelines are observed.

Q: Selection Guide: Should I use a single-channel or dual-channel barrier?
A: Select the K-LB-1.30 for dedicated single-loop protection where physical and electrical separation between channels is required for safety integrity.

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