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Specification & Description
| Specification | Description |
|---|---|
| Part Number | KFD2-GR-EX1 |
| Manufacturer | Pepperl + Fuchs |
| Supply Connection | Power Rail or terminals 17+, 18- |
| Rated Voltage | 18 ... 32 V DC |
| Power Consumption | Approx. 2 W |
| Input Connection | Terminals 1+, 2+, 3- |
| Measurement Range | Pt100: 10 ... 390 Ω |
| Measuring Current | Approx. 2 mA |
| Output I | Limit value 1: terminals 10, 11, 12 |
| Output II | Limit value 2: terminals 13, 14, 15 |
| Contact Loading | 253 V AC, 2 A, cos ϕ > 0.6 |
| Mechanical Life | 2 x 10^7 switching cycles |
| Deviation | LC-display, ± 0.5 % of measuring value + 1 digit |
| Ambient Temperature | -20 ... 60 °C (253 ... 333 K) |
| Protection Degree | IP20 |
| Mass | Approx. 250 g |
| Electrical Isolation | Input/Output safe electrical isolation acc. to EN 50020, voltage peak value 375 V |
| Directive Conformity | Electromagnetic compatibility standards Directive 89/336/EC on request |
| Type of Protection | [EEx ia] IIB IIC |
| External Capacitance | 0,425 µF 0,068 µF |
| External Inductance | 25 mH 5 mH |
| Display | 3 1/2-digit LC-display for switching points and actual value |
| Features | High/low alarm selectable for each switching point, relay operation mode adjustable separately |
The Pepperl + Fuchs KFD2-GR-EX1 is a high-performance trip amplifier designed for seamless integration with Pt100 and Ni100 temperature sensors in industrial settings. This one-channel device is engineered to provide precise monitoring and control of temperature processes within hazardous areas, ensuring operational efficiency and reliability.
Equipped with two relay outputs, the KFD2-GR-EX1 offers the flexibility to set high or low alarms for each switching point, with the mode of operation adjustable to suit specific application requirements. The unit features a 3 1/2-digit LC-display that presents switching points and actual values clearly, facilitating easy monitoring and adjustments.
The input for this device is certified EEx ia IIC, indicating intrinsic safety for use in potentially explosive atmospheres. The KFD2-GR-EX1 also includes lead breakage monitoring, which can be deactivated if necessary, adding an extra layer of operational security.
For ease of use, all operating and indicator elements are conveniently located on the front side of the device. The hysteresis range is adjustable from 1% to 10% of the measuring range, allowing for precise control over the temperature measurement process.
The KFD2-GR-EX1 is designed with safety in mind, featuring safe electrical isolation between the input, output, and power supply in accordance with EN 50020 standards. This ensures that the device operates safely and reliably, even in challenging industrial environments.
Overall, the Pepperl + Fuchs KFD2-GR-EX1 is a robust and versatile solution for temperature monitoring and control in hazardous areas, offering both precision and reliability for a wide range of industrial applications.
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Frequently Asked Questions
What type of power supply is required for this device?
The device requires a rated voltage of 18 to 32 V DC, which can be supplied through a Power Rail or terminals 17+ and 18-.
Can this device be used with a Pt100 sensor?
Yes, the device is designed to work with Pt100 sensors, with a measurement range of 10 to 390 Ohms and a measuring current of approximately 2 mA.
What are the output specifications of this device?
The device has two outputs, Output I and Output II, each with terminals for limit values. They can handle a contact loading of 253 V AC, 2 A, with a cos ϕ greater than 0.6 and have a mechanical life of 2 x 10^7 switching cycles.
How does ambient temperature influence the device's performance?
The device's switching point is influenced by ambient temperature at a rate of 0.015% per Kelvin of the measuring range, and the display is influenced at a rate of 0.01% per Kelvin of the measuring range.
What is the function of the LC-display on the device?
The LC-display on the device shows the resistance of the Pt100 directly in Ohms, and by using the Pt100-value table, you can determine the corresponding measurement temperature.
Is there any electrical isolation provided in this device?
Yes, the device provides safe electrical isolation according to EN 50020 between input/output, input/power supply, and output/power supply, with a voltage peak value of 375 V.
What type of protection does this device offer in hazardous areas?
The device offers [EEx ia] type of protection for explosion groups IIB and IIC, with specific parameters for external capacitance and inductance provided in the technical documentation.
How can I adjust the switch points or limit values?
Switch points or limit values can be adjusted using the potentiometers T1 and T2 on the device. Additionally, hysteresis for each switch point can be set using potentiometers 1 and 2.
What are the ambient operating conditions for this device?
The device can operate in ambient temperatures ranging from -20 to 60 degrees Celsius, and it has a protection degree of IP20.
How does the device handle lead breakage monitoring?
Lead breakage monitoring can be turned on or off using the DIP switch S2.3. If lead breakage occurs in the input circuit, the output relays will be deactivated.
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