Pepperl+Fuchs K-LB-2.6G Surge Protection Barrier | K-System Module

Product Overview

The K-LB-2.6G by Pepperl+Fuchs is a high-performance, 2-channel surge protection barrier. It safeguards sensitive instrumentation against induced transients caused by lightning or switching impulses. This module effectively diverts surge currents to ground while maintaining safe signal voltage levels. It serves as a critical defense layer for Zener barriers, I/O cards, and field devices.

Technical Specifications

• Brand: Pepperl+Fuchs
• Model: K-LB-2.6G
• Rated Voltage (Un): ≤ 6 V
• Rated Current (In): ≤ 250 mA
• Frequency Response (Bandwidth): ≥ 40 kHz
• Series Resistance: ≤ 0.3 Ω per conductor
• Nominal Discharge Current: 10 kA per core (8/20)
• Maximum Surge Current (Imax): 20 kA per core (8/20)
• Operating Temperature: -30 °C to 80 °C
• Protection Rating: IP20
• Dimensions: 12.5 x 114 x 110 mm
• Weight: Approx. 100 g

Installation and Compatibility

• Mount the module securely on a standard 35 mm DIN rail.
• Ensure the device connects to a solid, low-impedance ground system.
• Maintain equipotential bonding between the barrier and protected instruments.
• Use terminals 1-4 for the unprotected area and terminals 5-8 for the protected area.
• The K-LB-2.6G is fully compatible with standard control cabinets and modular PLC systems.

Maintenance and Diagnostics

• The device supports uninterruptible operation with automatic reset functionality.
• No periodic calibration is required for surge suppression components.
• Inspect ground connections annually to ensure integrity against high-energy transients.
• Status is managed via circuit-level clamping; check wiring if signal continuity fails.

Certifications and Compliance

• ATEX Certification: PTB 00 ATEX 2176X
• Hazardous Area Rating: II 2(1)G Ex ia IIC T6
• CSA Approval: Control drawing 116-0187
• IECEx Approval: IECEx BAS 14.0010X
• Compliance: EN 60079-0, EN 60079-11, and IEC 60529

Typical Applications

• Oil and gas refinery control loops.
• Chemical processing plant instrumentation.
• Water and wastewater automation systems.
• Safety barriers for intrinsically safe (IS) field sensors.

Shipping and Warranty

• We offer reliable global shipping via FedEx, UPS, and DHL.
• Standard processing time is 24-48 hours for all orders.
• All units include a comprehensive 12-month quality warranty.

Buying Guide

• Verify your loop voltage does not exceed 6 V.
• Ensure the required surge capacity (20 kA max) meets your site's lightning protection zone.
• Confirm your control cabinet space permits the 12.5 mm width module.
• Use with compatible K-System accessories for seamless integration.

Frequently Asked Questions

Q: Can I use the K-LB-2.6G in non-hazardous locations?
A: Yes, this barrier is suitable for both intrinsically safe (IS) and non-IS applications.

Q: How does the auto-reset feature function?
A: The surge protection components are self-restoring after clamping the transient energy.

Q: Does the barrier affect my signal frequency?
A: With a bandwidth of ≥ 40 kHz, it maintains signal integrity for most standard process control loops.

Q: Is grounding critical for this module?
A: Absolutely. A robust ground connection is essential for the surge energy to bypass your instrumentation.

Global PLC Spare HUB's Insight

As experts in industrial hardware, we recognize the K-LB-2.6G as a premium choice for circuit protection. Its compact footprint and high surge current capacity make it ideal for protecting modern PLC I/O modules and analog sensors. Our team recommends this for facilities that require high reliability in harsh electromagnetic environments. It effectively mitigates common-mode interference and protects against unexpected power spikes that often lead to costly downtime.

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