Pepperl+Fuchs KFD2-UFC-EX1.D 231194 24VDC Single Channel Frequency Conversion Safety Barrier

1. Overview of the Pepperl+Fuchs KFD2-UFC-EX1.D 231194

The Pepperl+Fuchs KFD2-UFC-EX1.D 231194 is a single-channel frequency conversion safety barrier from the Pepperl+Fuchs K-System series, designed for Zone 0 hazardous locations. It isolates and converts frequency signals (1 mHz…5 kHz) from NAMUR sensors or dry contacts into 0/4…20 mA analog outputs, while also providing two programmable relay alarm points. Its 40 mm-thick DIN rail enclosure (40 × 119 × 115 mm, IP20) allows for minimal space in cabinets. Its wide operating temperature range of -20…+60°C ensures reliable operation in offshore platforms, oil and gas storage and transportation, and chemical plants.

The device is internationally certified to ATEX / IECEx Ex ia IIC T4 Ga and Ex ia IIIC T135°C Da, providing reliable isolation between intrinsically safe circuits and larger systems. Powered by 24 V DC (20…30 V), with a typical power consumption of 100 mA, it can be plugged directly into a Power-Rail power rail for hot swapping without downtime. Parameters such as range, alarm value, and filter time can be set in seconds using the panel knob or PC software. The LED displays input frequency, relay status, and line faults in real time, significantly reducing commissioning and maintenance time.

2. Core Features:

1. Basic Parameters
• Function Type: Single-channel frequency conversion barrier
• Explosion Protection Classification: ATEX / IECEx Ex ia IIC T4 Ga, Ex ia IIIC T135°C Da
• Input Specifications: NAMUR sensor or dry contact in accordance with EN 60947-5-6, pulse width ≥ 50 µs
• Input Frequency: 1 mHz to 5 kHz (programmable)
• Analog Output: 0/4 to 20 mA, load 0 to 550 Ω, resolution 14 bits
• Switching Output: Two changeover relays, contact rating 40 V DC / 2 A (resistive), can be used as overspeed/underspeed alarms
• Power Supply: 20 to 30 V DC, typical power consumption 2.4 W, supports Power-Rail rails
• Electrical Isolation: Input/output/power three-way isolation, isolation voltage ≥ 2.5 kV AC
• Operating Temperature: -20 to +60°C °C, humidity ≤ 95% RH (non-condensing), IP20, DIN rail mount
• Dimensions and Weight: 40 × 119 × 115 mm, approximately 150 g
2. Core Functions
Frequency to Current Linear Conversion: The range start and end points can be set arbitrarily within 1 mHz to 5 kHz using the front panel knob or PC software, with a linear output of 0/4 to 20 mA.
Programmable Trip: Two relay groups can independently set upper and lower alarm limits, start delay, and hysteresis, enabling overspeed, underspeed, or stall interlocks.
Fault Monitoring: Real-time detection of short circuits, disconnections, and overloads, LED status indication, and relay fault outputs, meeting SIL2/IEC 61508 requirements.
Maintenance-Free: Hot-swappable and with a centralized 24 V power supply, replacement or expansion can be performed without downtime.
3. Typical Applications
• Petroleum/Chemical Industry: Speed ​​monitoring and interlock protection for pumps and compressors in Zone 0. • Pharmaceuticals/Food: Blockage and break alarms for powder conveyor belts.
• Wind Power/Rail Transit: Pitch motor and cooling fan speed feedback and overspeed protection.

3. Product details pictures

4. Related products

We are a global trading company specializing in PLC automation and industrial controls.

Xiamen Changxuyuan Trading Co., Ltd. is a leading global online wholesale supplier, offering a wide selection of new and discontinued products. We are committed to providing a wide range of high-quality products to our global customers at highly competitive factory direct prices, fast delivery times, and first-class customer service.

Our goal is to provide high-quality products to our global customers at highly competitive factory direct prices.

The more you buy, the more you save! Our website is available in multiple major languages ​​to meet the needs of our growing international customer base. Looking for low-priced, high-quality products? Xiamen Changxuyuan Trading Co., Ltd. is your ideal choice, offering high-quality products, low prices, fast delivery, and professional service—all backed by our strong global presence.

Four Reasons to Choose Us
1. We have the world's largest selection of industrial spare parts, including a wide variety of new and discontinued products.
2. We update our product information daily.
3. We have a diverse buyer base from around the world, constantly searching for high-quality, low-priced products to meet the diverse needs of our large global customer base.

4. We offer a wide variety of styles at the lowest online prices.

Factory Prices
Leveraging our extensive and strong partnerships with domestic and international manufacturers, we are able to offer high-quality products at exceptionally low factory prices. We are committed to working with global wholesalers to secure the best prices. If you are interested in our products, please feel free to contact us. We are confident that you will enjoy all of our exquisite products at wholesale prices.

Fast Shipping/Professional Packaging
We have established long-term partnerships with UPS, FedEx, DHL, and other leading global carriers, enabling us to offer world-class shipping options. Our dedicated warehouse staff will meticulously process your order, ensuring packaging according to our strict and rigorous standards. Your product will be carefully inspected and securely packaged before shipment. We ship to thousands of customers in dozens of countries around the world every day, demonstrating our commitment as a leading global industrial spare parts company, ensuring the highest level of responsiveness at all times.

Best Customer Service
We value our relationships with every customer, and our dedicated customer service team is always here to assist you. Due to the vast product offering, all staff members are fully trained and familiar with the latest trends and products. We also offer a dedicated online chat service to answer all your questions and respond immediately. Your satisfaction is always our top priority.

Brands