K-LB-1.6G 1-Channel Surge Protector by Pepperl+Fuchs - 6V IS Module

Product Overview

The Pepperl+Fuchs K-LB-1.6G is a high-performance, 1-channel surge protection barrier. It is designed for critical industrial environments. This DIN rail mount module shields sensitive control and field circuit inputs from induced transients. It guards against lightning strikes and switching impulses. The K-LB-1.6G clamps voltage to safe levels. It diverts excess energy to ground. This ensures continuous operation of your automation infrastructure. It protects devices with low isolation-to-ground ratings. This includes Zener barriers and standard I/O cards.

Technical Specifications

• Brand: Pepperl+Fuchs
• Model: K-LB-1.6G
• Series: K-System Surge Protection
• Rated Voltage (Un): ≤ 6 V
• Rated Current (In): ≤ 250 mA
• Frequency Response (Bandwidth): ≥ 40 kHz
• Series Resistance: ≤ 0.3 Ω per conductor
• Response Time: 1 ns (Symmetrical), 100 ns (Asymmetrical)
• Max. Surge Current (8/20): 20 kA per core
• Leakage Current: ≤ 5 µA
• On-state Voltage: ≤ 12 V
• Operating Temperature: -30 °C to +80 °C
• Protection Rating: IP20 (IEC 60529)
• Dimensions: 12.5 x 114 x 110 mm
• Weight: Approx. 100 g

Installation and Maintenance

• Snap the K-LB-1.6G module directly onto a 35mm DIN rail.
• Connect unprotected field wiring to terminals 1 and 2.
• Connect the protected control side to terminals 7 and 8.
• Connect the module to a solid, effective system ground.
• Maintain equal potential between the barrier and the instrument.
• The device provides uninterruptible operation with automatic reset.

Compatibility and Certifications

• Ex-Area Rating: II 2(1)G Ex ia IIC T6
• ATEX Certification: PTB 00 ATEX 2176X
• International Standards: IECEx BAS 14.0010X, CSA Approved (116-0187)
• System Compatibility: Compatible with Zener barriers, I/O cards, and 6V field instrumentation.

Typical Applications and Diagnostics

• Protects intrinsically safe field loops.
• Shields sensitive I/O modules in DCS and PLC systems.
• Suppresses transients in process automation networks.
• The K-LB-1.6G ensures reliable surge dissipation.
• It minimizes downtime caused by electrical faults.

Logistics and Warranty

• Shipping: Fast processing within 24-48 hours.
• Carriers: FedEx, UPS, DHL.
• Warranty: 12-month standard manufacturer warranty.
• Package Contents: 1x K-LB-1.6G Surge Protection Barrier, Installation Manual.

FAQ and Buying Guide

• How do I select the right barrier for my system?
  Check your operating voltage (must be ≤ 6 V) and verify if the instrument requires intrinsically safe (IS) protection.
• Is grounding critical for this module?
  Yes, the K-LB-1.6G requires a low-impedance ground connection to function correctly.
• Can I use this for non-IS applications?
  Yes, this device protects both 6 V IS and non-IS signal loops.
• How often should I test the barrier?
  Inspect the grounding integrity during your routine plant maintenance intervals.

Global PLC Spare HUB's Insight

The K-LB-1.6G serves as an essential guard for expensive control hardware. Based on our technical review at Global PLC Spare HUB, we recommend this module for PLC analog input cards and field transmitters. Its low series resistance ensures minimal signal degradation. It is ideal for high-speed process loops requiring high reliability.

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