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Specification & Description
| Specification | Description |
|---|---|
| Part Number | KFD2-SOT2-EX2 |
| Manufacturer | Pepperl + Fuchs |
| Series | KFD2 |
| Type | Switch Amplifier |
| Supply Voltage | 20 ... 30 V DC |
| Ripple | ≤ 10 % |
| Rated Current | ≤ 50 mA |
| Power Loss | 1 W |
| Input Connection | Terminals 1+, 3-; 4+, 6- |
| Open Circuit Voltage | Approx. 8 V DC |
| Short-Circuit Current | Approx. 8 mA |
| Switching Point/Hysteresis | 1.2 ... 2.1 mA / Approx. 0.2 mA |
| Lead Monitoring Breakage | I ≤ 0.1 mA |
| Output Connection | Output I: terminals 7, 8; Output II: terminals 8, 9 |
| Collective Error Message | Power Rail (only on KFD2-SOT2-EX2) |
| Safety Maximum Voltage Um | 40 V DC |
| Signal Level | 1-signal: (external voltage) - 2.5 V max. for 10 mA or 3 V max. for 100 mA (100 mA, short-circuit proof) |
| Output I, II Signal | Electronic output, passive |
| Switching Frequency | ≤ 5 kHz |
| Electrical Isolation | Input/output safe electrical isolation according to EN 50020 |
| Ambient Temperature | -20 ... 60 °C (253 ... 333 K) |
| Protection Degree | IP20 |
| Mass | Approx. 150 g |
| Dimensions | 20 x 119 x 115 mm |
| Mounting | On 35 mm DIN mounting rail according to EN 60715 |
| EC-Type Examination Certificate | PTB 00 ATEX 2035 |
| Group, Category, Type of Protection | ¬ II (1)GD [EEx ia] IIC |
| Voltage Uo | 10.5 V |
| Current Io | 13 mA |
| Power Po | 34 mW (linear characteristic) |
The Pepperl + Fuchs KFD2-SOT2-EX2 Switch Amplifier is a robust and reliable solution designed to facilitate the transfer of digital signals from hazardous areas to safe zones. This 2-channel isolated barrier is engineered to work with both dry contact and NAMUR inputs, making it a versatile choice for a variety of industrial applications.
Equipped with a 24 V DC supply via Power Rail, this switch amplifier ensures a streamlined power connection while maintaining a high degree of safety and efficiency. The unit features isolated passive transistor outputs that are non-polarized, providing flexibility in connecting to the safe area load. Additionally, the outputs can be easily reversed using the onboard switches, allowing for customisable control based on specific operational requirements.
The KFD2-SOT2-EX2 also includes line fault detection (LFD) capabilities, which are essential for monitoring the integrity of the control circuit. This feature can be activated or deactivated as needed, offering additional control to the user. In the event of an error condition, the device's transistors revert to their de-energized state, and the fault is clearly indicated by the integrated LEDs in accordance with NAMUR NE44 standards.
Designed to accommodate up to SIL 2 according to IEC/EN 61508, the switch amplifier ensures a high level of functional safety, making it suitable for use in environments where safety is paramount. Its compact dimensions and IP20 degree of protection make it an ideal choice for mounting on standard 35 mm DIN rails, ensuring easy integration into existing systems.
The Pepperl + Fuchs KFD2-SOT2-EX2 is a testament to the brand's commitment to quality and innovation, offering a reliable and efficient way to manage digital signals in challenging industrial settings.
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Frequently Asked Questions
What is the purpose of the Switch Amplifier?
The Switch Amplifier is designed to transfer digital signals from hazardous areas to safe areas, such as from NAMUR sensors or mechanical contacts. It controls passive transistor outputs for safe area loads and features line fault detection and reversible operation modes.
Can the output state of the Switch Amplifier be reversed?
Yes, the normal output state can be reversed using the integrated switches on the device. Switch S1 is for channel I and switch S2 is for channel II, allowing for flexible operation depending on the application requirements.
Is the Switch Amplifier suitable for use in safety-related applications?
Yes, the Switch Amplifier is suitable for safety-related applications and is rated up to SIL 2 according to IEC/EN 61508, making it a reliable choice for systems that require a high level of functional safety.
What type of inputs does the Switch Amplifier accept?
The Switch Amplifier accepts dry contact or NAMUR inputs, providing versatility for different types of sensors and switches used in various industrial environments.
How does the Switch Amplifier indicate an error condition?
In the event of an error condition, the transistors of the Switch Amplifier revert to their de-energized state, and the error is indicated by LEDs on the device according to NAMUR NE44 standards.
What is the supply voltage range for the Switch Amplifier?
The Switch Amplifier operates within a supply voltage range of 20 to 30 V DC, making it compatible with standard industrial power supplies.
Does the Switch Amplifier have line fault detection capabilities?
Yes, the Switch Amplifier features line fault detection (LFD) capabilities, which can be enabled or disabled using switch S3. This feature helps to identify issues such as wire breakage or short circuits in the field circuit.
What is the maximum switching frequency of the Switch Amplifier?
The Switch Amplifier has a maximum switching frequency of 5 kHz, allowing it to handle rapid digital signal changes efficiently.
What type of electrical isolation does the Switch Amplifier provide?
The Switch Amplifier provides reinforced insulation between input/output and input/power supply according to IEC 62103, with a rated insulation voltage of 300 Vrms, ensuring safe operation and protection against electric shock.
How is the Switch Amplifier mounted for use?
The Switch Amplifier is designed for mounting on a 35 mm DIN mounting rail according to EN 60715:2001, which is a standard mounting method for industrial control equipment.
