Pepperl+Fuchs kfd2 sr2 ex1 w lb Isolated NAMUR Switch Amplifier Safety Barrier
Product Details:
Manufacturer : Pepperl + Fuchs
Product No. : kfd2 sr2 ex1 w lb
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The Pepperl+Fuchs KFD2-SR2-EX1.W.LB is an upgraded DIN rail mounted isolated switch amplifier built for intrinsic safety signal transmission between explosive hazardous areas and safe control cabinets, matching the search keyword set kfd2 sr2 ex1 w lbPepperl+Fuchs. The LB suffix stands for enhanced Line Breakage monitoring, delivering continuous full-loop open wire & short-circuit supervision with dedicated independent fault relay output, a key upgrade over standard KFD2-SR2-EX1.W variantsPepperl+Fuchs.
Detail:
| Parameter Group |
Specification Item |
Exact Datasheet Value |
| Power Supply |
Rated Operating Voltage |
19 V DC ~ 30 V DC (nominal 24 V DC) |
| Power Supply |
Max Input Ripple Tolerance |
≤ 10% |
| Power Supply |
Rated Operating Current |
≤ 45 mA |
| Power Supply |
Max Power Dissipation |
≤ 0.9 W |
| Power Supply |
Connection Interface |
DIN power rail / Terminals 14+, 15- |
| Hazardous Field Input |
Compliance Standard |
EN 60947-5-6 NAMUR |
| Hazardous Field Input |
Open Circuit Voltage |
Approx. 8 V DC |
| Hazardous Field Input |
Short-Circuit Loop Current |
Approx. 8 mA |
| Hazardous Field Input |
NAMUR Switching Current Range |
1.2 mA ~ 2.1 mA |
| Hazardous Field Input |
Switch Hysteresis |
Approx. 0.2 mA |
| LB Line Fault Threshold |
Wire Breakage Detection |
Loop current ≤ 0.1 mA |
| LB Line Fault Threshold |
Field Short-Circuit Trigger |
Loop current > 6 mA |
| Input Terminals (Ex Side) |
Wiring Label |
1+, 2+, 3- |
| Relay Output I (Signal) |
Contact Type |
Form C changeover relay |
| Relay Output II (LB Fault/Signal) |
Contact Type |
Form C changeover relay |
| Relay Contact AC Load Rating |
Max AC Switching Capacity |
250 V AC / 2 A (cosφ > 0.75) |
| Relay Contact DC Resistive Load |
Max DC Switching Capacity |
40 V DC / 2 A |
| Relay Minimum Switching Current |
Low-Load Operation Limit |
2 mA @ 24 V DC |
| Relay Response Delay |
Pull-in / Drop-out Time |
≤ 20 ms each channel |
| Galvanic Isolation Grade |
Insulation Standard |
Reinforced insulation IEC 61010-1 |
| Isolation Voltage (All Circuits) |
Dielectric Strength |
300 V eff reinforced isolation |
| Max Switching Frequency |
Digital Signal Speed |
≤ 10 Hz |
| Minimum Pulse/Pause Ratio |
Signal Stability Requirement |
≥ 20 ms / ≥ 20 ms |
| Classification Category |
Attribute Item |
Standardized Technical Parameter |
| Mechanical Dimensions |
Overall Housing Size (W × H × D) |
20 mm × 119 mm × 115 mm |
| Mounting Standard |
DIN Rail Compatibility |
35 mm standard DIN rail EN 60715 |
| Housing Protection Class |
Ingress Rating |
IP20 (indoor control cabinet only) |
| Net Unit Weight |
Mass of Single Barrier |
Approx. 150 g |
| Mechanical Configuration |
Adjustment Components |
3-position DIP switches S1, S2, S3 |
| Visual Status Feedback |
LED Indicator Set |
Green Power LED, Yellow Signal LED, Red LB Fault LED |
| Operating Ambient Temp |
Working Temperature Range |
-20 °C ~ +60 °C |
| Storage Temperature Range |
Offline Storage Limit |
-40 °C ~ +70 °C |
| EMC Electromagnetic Compliance |
Applied Standards |
EN 61326-3-1, EN IEC 61326-3-2, NE 21:2017 |
| Functional Safety SIL Rating |
Safety Integrity Level |
SIL 2 (IEC 61508 Low/High Demand) |
| Systematic Capability |
SC Grade |
SC 3 |
| Safety Failure Fraction |
SFF Value |
75% |
| Probability of Dangerous Failure |
PFH Rate |
3.77 × 10⁻⁸ 1/h |
| Explosion Hazard Certification |
ATEX Certificate Code |
PTB 00 ATEX 2080 |
| Hazardous Zone Marking |
Ex Classification |
II (1)G [Ex ia Ga] IIB |
| Global Approvals & Marks |
Official Certifications |
CE, IECEx, SIL2, ATEX |
| Relay Mechanical Lifespan |
Total Switch Cycles |
10⁷ operations |
Brand
Pepperl+Fuchs Automation is our world. Perfect application solutions are our goal.
In 1945, against the backdrop of a war - torn world, Walter Pepperl and Ludwig Fuchs, driven by a strong sense of inventiveness, entrepreneurial foresight, and a deep - seated belief in self - reliance, established a humble radio workshop in Mannheim, Germany.
Their journey was filled with hands - on exploration. As they worked on various radio - related projects, the experiences they amassed became the fertile ground for new and innovative concepts. They took great pleasure in delving into the needs of their customers, constantly striving to develop products that could meet and exceed expectations.
Achievers Automation Limited has more than 10 years experience in the market of Industrial Automation, specialized in reselling factory sealed Probe, Sensor, DCS,isolator barrier, HMI, PLC,Adapter,Profibus connector and cable from Brands as BENTLY NEVADA, E+H, MTL, AB, Pepperl+Fuchs, YOKOGAWA, ASCO, Schneider, Lenze, Pro-face, Mitsubishi, Omron, Lenze, Delta, IFM etc. If you have any request, please do not hesitate to contact us.
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FAQ of Achievers
Q:Are the Products Genuine OEM Units?
A: These items have been certified by Achievers Automation Limited to be genuine OEM Units obtained through OEM or independent third-party channels.
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A: We can arrange shipment based on your request. We have cooperated forwader who can arrange shipment via FedEx, DHL,TNT with good price.
Q:What is the warranty of goods?
A: One-year Warranty.
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