Pepperl Fuchs KFD2-CRG2-1 Transmitter Power Supply & Current Driver

Description Does your control loop require a high degree of flexibility for both sourcing and sinking signals across different voltage potentials? The KFD2-CRG2-1 is a highly versatile signal conditioner within the Pepperl Fuchs K-System family. Unlike basic isolators, the CRG2 series is designed to handle both transmitter power supply functions and current driving tasks, providing a 3-port galvanic isolation barrier between input, output, and the power supply. Inventory Status and Commercial Logistics Product Condition: New Original (Factory Sealed). Availability: Stocked in global distribution hubs; available for immediate dispatch. Lead Time: 1–3 business days for international express air freight. Warranty Protection: 12-month standard industrial warranty from date of shipment. Commercial Note: The price listed on digital marketplaces serves as a reference point. Real-time pricing is subject to global inventory levels and regional trade policies. Request a formal quote for bulk pricing or project-specific discounts. Technical Specifications and Field Parameters In field deployments of the K-System, the KFD2-CRG2-1 is often the “problem solver” for mismatched impedance or grounding issues between field transmitters and PLC/DCS input cards. Core Electrical Specifications Parameter Technical Value Model Designation KFD2-CRG2-1 Supply Voltage 20 to 30 V DC (via Power Rail or Terminals 11 , 12-) Input Signal 0/4 mA to 20 mA Output Signal 0/4 mA to 20 mA (Active or Passive) Input Load $\le$ 50 $\Omega$ (Current input) Transmitter Supply $\ge$ 15 V at 20 mA Isolation Barrier 3-port (Input / Output / Power) Accuracy 0.1% of full scale Temperature Range −20 to 60 °C (−4 to 140 °F) Functional Architecture The module is designed to bridge the gap between field sensors and control room logic. Dual Functionality: It can act as a transmitter power supply for 2-wire sensors or as a current driver for 3-wire sensors and self-powered sources. Fault Monitoring: The module features a dedicated Fault Bus via the Power Rail. If the input signal falls outside the 4–20 mA window (e.g., a wire break), it signals the system for immediate diagnostic action. Galvanic Isolation: It provides a 2.5 kV AC isolation barrier, which is essential for protecting expensive PLC/DCS analog cards from high-voltage transients and ground loops. Global Procurement and Customs Compliance Notes Shipping specialized interface modules like the KFD2-CRG2-1 across borders requires precise documentation to avoid long-term holds at customs entry points. Export Controls and Regulatory Data US ECCN: EAR99 HS Code: 85437090 (Electrical apparatus with individual functions) Certifications: CE, UL, and SIL 2 (IEC/EN 61508) rated for safety-instrumented systems. Country of Origin: Usually Germany or Singapore; check the specific unit nameplate for Certificate of Origin (COO) verification. Logistics and Shipping Options We offer FCA (Free Carrier) or DAP (Delivered at Place) terms for international orders. For critical plant maintenance, we utilize DHL or FedEx international priority. The module is compact and lightweight (approx. 150 g), allowing for cost-effective air transport even for large-quantity replacements. We use anti-static, shock-resistant packaging to ensure the internal components remain calibrated during high-altitude transit. Engineering Notes for Field Deployments Important Configuration Note: The KFD2-CRG2-1 uses side-mounted DIP switches to define the output mode (Source vs. Sink). If you configure the module for “Source” but your PLC card also provides loop power, you will likely blow the internal fuse of the analog card or damage the module’s output stage. Always verify the “Active/Passive” requirements of your control system before power-up. Well, technically the module supports 0–20 mA, but in our experience, most industrial users stay within the 4–20 mA range to utilize the under-range and over-range diagnostic capabilities. To be frank, if you aren’t using the Power Rail for fault signaling, you are missing out on one of the module’s best features—the ability to aggregate hardware alerts into a single system-wide alarm. On a recent project in a petrochemical facility, we found that field technicians were confused by the terminal numbering. For a 2-wire transmitter, you should typically use Terminals 1 and 3. If you are feeding a signal from a 4-wire (self-powered) device, you use Terminals 2 and 3. Mixing these up won’t necessarily break the module immediately, but it will result in zero signal being passed to the output. Frequently Asked Questions Can the KFD2-CRG2-1 be used in hazardous (Ex) areas? No. This module is a “Signal Conditioner” and does not have the internal current/voltage limiting required for Intrinsic Safety (IS). If your transmitter is located in a Zone 0 or Zone 1 environment, you must use the “Ex” version, such as the KFD2-STC5-Ex1. Does this module support HART protocol pass-through? No, the CRG2-1 is an analog-only isolator. If you need to perform remote sensor configuration or calibration via HART through the isolator, you require the KFD2-STC5-1 or a similar HART-compatible transmitter power supply. How do I request a formal pro forma invoice for my project? Submit your inquiry with the total quantity and the full destination address. Our global trade experts will generate a comprehensive quote including international freight costs, estimated transit times, and all necessary HTS codes for your customs broker. Are you planning to mount these modules on a standard DIN rail or are you utilizing the P F Power Rail for centralized 24 V distribution? 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