Diverts fieldbus line surges toward earth to protect connected field devices and control equipment.
Product Overview
FS-LBF-I1.32 is a Pepperl+Fuchs FieldConnex surge protector for intrinsically safe fieldbus installations. It is intended for PROFIBUS PA or FOUNDATION Fieldbus circuits designed under the FISCO or Entity model.
The FS version uses an M20 x 1.5 connecting thread. Installation, grounding and hazardous-area suitability must follow the rating plate and the applicable fieldbus and explosion-protection design.
Performance
Protects the two-wire fieldbus path while preserving the intrinsically safe installation concept.
Supports field mounting with the documented M20 x 1.5 threaded connection.
Uses a dedicated protective-earth path whose conductor length and cross-section affect surge performance.
Technical Details
| Manufacturer | Pepperl+Fuchs |
|---|---|
| Exact model | FS-LBF-I1.32 |
| Product family | FieldConnex |
| Product type | Fieldbus surge protector |
| Protection execution | Intrinsically safe |
| Fieldbus systems | PROFIBUS PA and FOUNDATION Fieldbus |
| Intrinsic-safety models | FISCO or Entity |
| Connecting thread | M20 x 1.5 |
| Installation rule | Use only within the approved hazardous-area design |
| Grounding requirement | Short, low-impedance protective-earth connection |
System Integration
- Confirm the hazardous-area classification, intrinsic-safety calculation and selected FISCO or Entity design before installation.
- Mount the protector using the M20 x 1.5 interface and maintain enclosure protection according to the installation instructions.
- Keep the earth conductor short and use the required conductor cross-section so surge current has an effective path.
- Do not return a device to an intrinsically safe circuit after it has been operated in an incompatible general electrical system.
Applications
- PROFIBUS PA field segments requiring surge protection at a field device or segment protector.
- FOUNDATION Fieldbus H1 installations engineered for intrinsically safe operation.
- Hazardous-area field connections using the specified M20 x 1.5 mounting interface.
FAQ
What distinguishes FS-LBF-I1.32 from the FN version?
FS-LBF-I1.32 uses an M20 x 1.5 connecting thread; the FN execution uses a one-half-inch NPT interface.
What design records are needed before ordering FS-LBF-I1.32?
Provide the fieldbus type, hazardous-area classification, FISCO or Entity calculation, enclosure entry and grounding arrangement.
Can FS-LBF-I1.32 compensate for poor grounding?
No. Effective surge diversion depends on a short, low-impedance earth path installed to the applicable instructions.
Where should FS-LBF-I1.32 be placed in a fieldbus segment?
Use the approved segment design and protect the vulnerable field entry or device path without changing the intrinsic-safety parameters.
What should be checked after a surge event involving FS-LBF-I1.32?
Follow the site inspection procedure, examine the protector and earth path, and verify fieldbus communication and intrinsic-safety integrity before restart.
About IndustryParts
https://www.industryparts.com/Hazardous-area selection starts with the complete fieldbus design
IndustryParts handles FS-LBF-I1.32 with the thread, fieldbus type, intrinsic-safety model and grounding plan clearly recorded.
- M20 execution retained
- IS design reviewed
- Ground path documented
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