Pepperl+Fuchs KFD2-STC4-Ex120 Smart Transmitter Safety Barrier

Description

Pepperl+Fuchs KFD2-STC4-Ex120 Smart Transmitter Safety Barrier

Product Dimensions：

The KFD2-STC4-Ex1 is a high-performance SMART Transmitter Power Supply isolated barrier. It is designed to provide power to 2-wire SMART transmitters in hazardous areas and transfer the current signal to the safe area.

1. Product Description

This isolated barrier is used for intrinsic safety applications. It supplies 2-wire SMART transmitters with energy and can also be used with 2-wire SMART current sources. It transfers the analog input signal to the safe area as an isolated current value. Digital signals may be superimposed on the analog values in the hazardous or safe area and are transferred bi-directionally (HART communication).

2. Technical Parameters

3. Key Advantages

• Bi-directional HART Communication: Supports remote configuration and diagnostics of field devices without interrupting the 4-20 mA signal.

• High Reliability: Certified for use in SIL 2 functional safety loops.

• Versatile Output: The output can operate as a current source or a current sink, providing flexibility for different PLC/DCS input cards.

• Low Power Dissipation: Optimized design reduces heat buildup within the control cabinet.

• Error Messaging: Features a fault bus for collective error messages via the Power Rail.

4. Important Considerations (Precautions)

• Intrinsic Safety: Ensure that the entity parameters ($U_o, I_o, P_o$) of the barrier match the parameters of the field device to maintain the integrity of the explosion protection.

• Wiring: Always separate intrinsically safe (blue terminals) and non-intrinsically safe wiring to prevent cross-interference.

• Power Supply: While it can be powered via terminals, using the Power Rail system simplifies installation and provides collective error messaging.

• Environment: Ensure the ambient temperature does not exceed the rated 60°C, especially in densely packed cabinets.

5. Typical Applications

The KFD2-STC4-Ex1 is widely used in industries such as Oil & Gas, Chemical, and Pharmaceutical where sensors are located in explosive atmospheres (Zone 0, 1, or 2).

• Pressure & Temperature Monitoring: Powering SMART transmitters on tanks or pipelines.

• Flow Measurement: Interfacing with electromagnetic or vortex flowmeters in hazardous zones.

• Level Control: Connecting ultrasonic or radar level sensors to a DCS in the safe area.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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