Product details
Product Description
- KFD2-RR-EX1 is a 1-channel isolated barrier for RTD and resistance signals.
- It delivers a resistance output to the control system with 0.1 % accuracy.
- Operates on 24 V DC supply via Power Rail, width only 12.5 mm.
- Supports Pt100, Pt500, Pt1000 inputs and includes line fault detection (LFD).
- Rated voltage: 20 … 35 V DC, Ex-Input for hazardous areas.
- Up to SIL 2 (SC 3) acc. to IEC/EN 61508.
- Shipping weight: 1.1 kg.
Technical Specifications
- Brand: Pepperl+Fuchs
- Model: KFD2-RR-EX1
- Type: Thermometer Resistance Repeater
- Input: RTD (Pt100, Pt500, Pt1000) or resistance
- Output: Resistance (to safe area)
- Accuracy: 0.1 % of span
- Linearity: ±0.05 % typical
- Resolution: 0.01 Ω
- Temperature Range (ambient): -20 … +60 °C
- Environmental Tolerance: IP20, suitable for industrial environments
- Immunity: High EMC resistance per NAMUR NE21
- Supply Voltage: 20 … 35 V DC
- Power Consumption: ≤ 1.5 W
- Response Time: < 300 ms
Installation & Compatibility
- Mounting: Snap-on to 35 mm DIN rail (EN 60715).
- Terminals: Screw-type, wire cross-section up to 2.5 mm².
- Orientation: Any, but allow 10 mm clearance for ventilation.
- Compatibility: Works with all standard PLC/DCS analog inputs.
- Direct replacement for older Pepperl+Fuchs barriers.
- Power Rail ready for shared DC supply.
Commissioning & Maintenance
- Setup: DIP switches for sensor type and LFD on/off.
- LED indication: Green for power, red for fault or LFD alarm.
- Maintenance: No routine calibration; auto-diagnostics reduce downtime.
- Testing: Quick loop check via output resistance measurement.
Certifications & Safety
- ATEX, IECEx, and CSA for hazardous locations (Ex-Input).
- Functional Safety: SIL 2 (SC 3) per IEC 61508.
- EMC compliance: EN 61326-1, NAMUR NE21.
Package Contents
- KFD2-RR-EX1 isolated barrier (1 pc).
- User manual (digital download).
- Terminal labels and mounting accessories.
- Warranty: 12 months against manufacturing defects.
Shipping & Delivery
- Dispatch within 12–24 hours after order confirmation.
- Carriers: FedEx, UPS, DHL (express worldwide).
- Tracking number provided same day.
Expert Review
- “The KFD2-RR-EX1 offers robust signal isolation with exceptional linearity. Its LFD feature saves troubleshooting time. For SIL-rated loops, this barrier is a reliable choice.” – Senior Automation Engineer.
Manager’s Insight
- “Standardizing on this repeater reduces spare parts inventory. Its narrow housing and Power Rail compatibility cut cabinet space and wiring costs.” – Product Line Manager.
Applications
- Temperature measurement in chemical reactors.
- Resistance monitoring in HVAC and kilns.
- Remote RTD inputs to DCS/PLC in oil & gas.
- Safe-area signal conversion for Ex zone sensors.
FAQ
- Q: Can I use this with a 3-wire Pt100?
- A: Yes, it supports 2-, 3-, and 4-wire RTDs. LFD works with 3-wire.
- Q: What output resistance range does it provide?
- A: 0 … 1000 Ω, proportional to input.
- Q: Is the device polarity sensitive?
- A: No, it has reverse polarity protection on supply.
- Q: How do I reset a fault?
- A: Cycle power or press the reset button (if equipped).
- Q: Can I use it with a Pt500 sensor?
- A: Yes, select Pt500 via DIP switch.
Selection Guide
- Choose KFD2-RR-EX1 for universal RTD input and resistance output.
- If you need 2-channel or current output, see other models.
- For SIL 2 applications, this unit is pre-certified.
- Ensure supply voltage is stable (20–35 V DC).
- Check sensor lead resistance (≤ 20 Ω per lead) for LFD.
Contact Information:
Sales: sales@powergearx.com
WhatsApp: +86 18030005825
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Original Source: https://www.powergearx.com/
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