- Protection Level: Can withstand a maximum surge current of 20kA (8/20μs waveform), suitable for direct lightning strike and induced lightning protection, complying with the EN 61643-21 standard.
- Automatic Reset: Adopts a hybrid architecture of Gas Discharge Tube (GDT) and Transient Voltage Suppressor (TVS), which can automatically recover after surge impact without manual intervention.
- Low Residual Voltage Characteristic: Line-to-line residual voltage ≤100V, line-to-ground residual voltage ≤50V, ensuring signal integrity.
- Explosion-Proof Rating: Complies with ATEX certification (Ex ia IIC T6/T5/T4), suitable for gas explosion-proof Zone 0/1/2 and dust explosion-proof Zone 20/21/22.
- Energy Limitation: Achieves complete isolation between hazardous areas and safe areas through electrical isolation, limiting the energy entering hazardous areas (e.g., short-circuit current ≤250mA, open-circuit voltage ≤30V) to ensure intrinsic safety.
- Signal Compatibility: Supports voltage signal input of ±50mV to ±100mV, compatible with low-level signal sources such as thermocouples, RTDs (Resistance Temperature Detectors), and pressure transmitters.
- Electromagnetic Compatibility: Complies with the NAMUR NE21 standard, featuring strong anti-interference capability and stable operation in complex industrial environments.
- SIL 3 Certification: Obtains functional safety certification (IEC 61508), suitable for Safety Instrumented Systems (SIS).
- Cold-Junction Compensation Expansion: Can be used with K-CJC cold-junction compensators to offset the impact of ambient temperature changes on thermocouple measurements.
- DIN Rail Mounting: Supports 35mm standard rails; dimensions: 12.5×115×116mm, weight approximately 100g, saving cabinet space.
- Terminal Layout: Terminals on the field side (Terminal 7+/8-) and system side (Terminal 1+/2-) are marked with different colors to avoid wiring confusion; the ground terminal (PE) must be reliably connected to the grounding system (grounding resistance ≤1Ω).
- Intrinsically Safe Cable Requirements: Shielded twisted-pair cables must be used and laid separately from non-intrinsically safe cables, with a spacing of ≥50mm.
- Anti-Interference Measures: The signal circuit requires single-point grounding to avoid interference caused by ground potential difference.
- Status Monitoring: Real-time working status is displayed via LED indicators (steady green: normal; flashing red: surge triggered).
- Troubleshooting: If the indicator light is abnormal, check whether the grounding is reliable or read the diagnostic code (e.g., 0x8001 indicates a grounding fault) using a HART handheld communicator.
- Protect the thermocouple signal loop of reaction kettles to prevent signal distortion or equipment damage caused by lightning strikes.
- Isolate the weak voltage signals of vibration sensors to support high-precision condition monitoring in explosive environments.
- In gas turbine control systems, protect the mV signals of temperature sensors from operational overvoltage.
- Monitor the vibration of wind turbine gearboxes and provide early warning of equipment abnormalities through surge protection.
- Protect the low-level signals of pressure transmitters in cleanroom environments, supporting hygienic installation and meeting GMP compliance requirements.
- K: K series surge protector; LB: Surge protection module; 1.30G: 1-channel, rated voltage 30V, intrinsically safe type.
- Cold-Junction Compensator: It is recommended to match with the K-CJC module to compensate for the impact of ambient temperature changes on thermocouple measurements and ensure full-range accuracy.
- Redundant Design: Can be used in parallel with P-LB series surge protectors to achieve dual protection.
- Manufacturer: Pepperl+Fuchs (Germany), providing global technical support and certification document downloads (product manuals and wiring diagrams are available on the official website).
- Chinese Suppliers: Shanghai Guanning Technology, Wuhan Xierfu Trading, etc., providing spot sales and on-site technical services.
- Compliance Documents: Must comply with ATEX/IECEx installation specifications; grounding and power distribution must meet the EN 60079-14 standard.
- Do not plug or unplug the module when energized to avoid electric shock risks.
- Intrinsically safe cables and non-intrinsically safe cables must be strictly isolated to prevent safety hazards caused by mixed connections.
- When matching with PLC/DCS modules, confirm the input impedance matching (e.g., module input impedance ≥10kΩ) to avoid signal attenuation.
- For intelligent transmitter applications, ensure the signal bandwidth (0.3-7.5kHz) is within the range supported by the module to prevent communication failure.
- It is recommended to check the grounding resistance and surge counter once every 12 months to ensure the normal operation of the protection function.
- If the module frequently triggers surge protection, investigate whether there is a continuous overvoltage source on-site (e.g., equipment failure).
With its high reliability, intrinsic safety explosion-proof characteristics, and efficient surge protection capability, the K-LB-1.30G has become a core component for signal line protection in industrial automation, especially suitable for complex industrial scenarios where hazardous energy needs to be strictly controlled.
