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Specification & Description
| Specification | Description |
|---|---|
| Part Number | KFD2-STC1-EX1 |
| Manufacturer | Pepperl + Fuchs |
| Type | SMART Transmitter Power Supply |
| Supply Connection | Power Rail or terminals 7+, 8- |
| Rated Operational Voltage | 20 ... 35 V DC |
| Power Consumption | ≤ 1.2 W |
| Input Connection | Terminals 1+, 3- |
| Input Signal | 4 ... 20 mA |
| Output Connection | Terminals 8-, 9+, 10-, 11+ |
| Output Signal | 4 ... 20 mA, max. load 500 Ohm, with HART ≥ 230 Ohm |
| Ripple | ≤ 75 µA ss |
| Transfer Characteristics | Deviation ≤ 10 µA incl. calibration, linearity, hysteresis, loads and fluctuations of supply voltage |
| Temperature Influence | ≤ 20 p.p.m / K |
| Frequency Range | Hazardous area to safe area: 0 ... 12 kHz (-1 dB); 0 ... 30 kHz (-6 dB) |
| Rise Time | 40 µs |
| De-energised Delay | 40 µs |
| Galvanic Isolation | Input/Output safe galvanic isolation according to EN 50020 |
| Ambient Temperature | -20 ... 60 °C (253 ... 333 K) |
| Protection Degree | IP20 |
| Mass | Approx. 150 g |
| EC-Type Examination Certificate | BAS 00 ATEX 7127 |
| Group, Category, Type of Protection | [EEx ia] IIC (Tamb = 60 °C) |
| External Capacitance | 1.016 µF (KFD2-STC1-Ex1) |
| External Inductance | 33.6 mH (KFD2-STC1-Ex1) |
| Safety Maximum Voltage | Um 250 V (Attention! The rated voltage can be lower) |
The Pepperl + Fuchs KFD2-STC1-EX1 is a high-quality transmitter power supply designed to facilitate the safe and efficient operation of SMART transmitters within hazardous areas. This single-channel unit is engineered to provide a stable 24 V DC nominal supply voltage and is capable of supporting SMART communication protocols up to 12 kHz (-1 dB), ensuring compatibility with a wide range of industry-standard devices.
Constructed with intrinsic safety in mind, the KFD2-STC1-EX1 features an input signal range of 4 to 20 mA, making it suitable for a variety of process control applications. The device is adept at transferring measurement currents from the hazardous area to the safe area without compromising the integrity of the signal.
The power supply is designed to work within an ambient temperature range of -20 to 60 °C, catering to diverse environmental conditions. It also boasts a compact form factor with a mass of approximately 150 g and a protection degree of IP20, ensuring it can be easily integrated into existing systems.
With its robust electrical isolation and compliance with relevant EMC standards, the KFD2-STC1-EX1 is a reliable choice for industries requiring precise control and monitoring of processes in potentially explosive environments. Its compatibility with various SMART systems from leading manufacturers further underscores its versatility in industrial applications.
Commonly Asked Questions
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Frequently Asked Questions
What is the function of this transmitter power supply?
The transmitter power supply is designed to provide power to SMART transmitters in hazardous areas and to transfer the 4 mA to 20 mA analogue signal values to the safe area output terminals.
Can this device be used with HART communication protocol?
Yes, the KFD2-STC1-EX1 is capable of handling HART communication signals superimposed on the 4-20 mA signal, allowing for bidirectional digital communication in conjunction with the analogue signal.
What are the input and output signal ranges for this device?
The input signal range for this device is 4 to 20 mA, which is a standard for many process control instruments. The output signal is also 4 to 20 mA, suitable for driving control systems in the safe area.
What type of electrical isolation does this device provide?
The device provides safe electrical isolation according to EN 50020 between the input and output, and between the input and power supply, with a voltage peak value of 375 V.
What is the ambient temperature range in which this device can operate?
The device is designed to operate within an ambient temperature range of -20 to 60 °C, making it suitable for a variety of industrial environments.
What type of hazardous area protection does this device offer?
The device offers [EEx ia] IIC protection, which means it is suitable for use in areas where an explosive atmosphere is likely to occur and provides intrinsic safety for circuits in these environments.
What are the power supply requirements for this device?
The device requires a rated operational voltage of 20 to 35 V DC, with a power consumption of less than or equal to 1.2 W.
What is the maximum load that can be connected to the output?
The maximum load that can be connected to the output is 500 Ohm for the 4-20 mA signal. If HART communication is used, the minimum load resistance should be 230 Ohm.
How is the device mounted for use?
The device is designed for mounting on a 35 mm DIN rail, which is a standard mounting practice in industrial control equipment.
Does this device have any certifications?
Yes, the device has certifications including an EC-Type Examination Certificate and complies with various standards such as EN 50081-2 and EN 50082-2 for electromagnetic compatibility.
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