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Specification & Description
| Specification | Description |
|---|---|
| Part Number | KFD0-RO-EX2 |
| Manufacturer | Pepperl + Fuchs |
| Supply Voltage | 24 V DC (loop powered) |
| Input Voltage | 15 ... 30 V DC, non-polarized |
| Output Type | Relay contact output |
| Channels | 2-channel isolated barrier |
| Safety Integrity Level (SIL) | Up to SIL 3 according to IEC/EN 61508 |
| Input Current | ≤ 21 mA per channel |
| Contact Loading | 230 V AC/2 A/cos φ > 0.7; 40 V DC/2 A resistive load |
| Energised/De-energised Delay | Approx. 10 ms / approx. 5 ms |
| Mechanical Life | 5 x 10^6 switching cycles |
| Switching Frequency | < 10 Hz |
| Galvanic Isolation | Input/Output reinforced insulation, Output/Output basic insulation, rated insulation voltage 300 V eff |
| Ambient Temperature | -20 ... 65 °C (-4 ... 149 °F) |
| Degree of Protection | IP20 |
| Connection | Screw terminals |
| Mounting | On 35 mm DIN mounting rail acc. to EN 60715:2001 |
| EU-Type Examination Certificate | DMT 00 ATEX E 016 |
| Marking | 1 II (1)G [Ex ia Ga] IIC, 1 II (1)D [Ex ia Da] IIIC, 1 I (M1) [Ex ia Ma] I |
| Dimensions | 20 x 119 x 115 mm (0.8 x 4.7 x 4.5 inch) (W x H x D), housing type B2 |
| Mass | Approx. 100 g |
The Pepperl + Fuchs KFD0-RO-EX2 Relay Module is a high-performance interface solution designed for intrinsic safety applications within industrial settings. This 2-channel isolated barrier is engineered to switch intrinsically safe circuits on the field side, making it an ideal choice for applications such as remote resets, fire alarm tests, or remote calibration of strain gauges.
Constructed with reliability in mind, the KFD0-RO-EX2 features galvanic isolation between its outputs and inputs, ensuring that signal integrity is maintained without interference. The inputs are non-polarised and share a common reference potential, simplifying installation and maintenance. Each input is safeguarded by a fuse and electronic current limiting, providing an additional layer of protection against electrical anomalies.
The module is loop-powered with a rated voltage of 15 to 30 V DC and has a minimal power dissipation, making it energy efficient. It is capable of handling input currents of up to 21 mA per channel and offers contact loading of 230 V AC/2 A with a cos φ > 0.7 or 40 V DC/2 A for resistive loads. The mechanical life of the relay module is impressive, with up to 5 million switching cycles, and it operates within an ambient temperature range of -20 to 65 °C, accommodating a variety of environmental conditions.
For ease of monitoring, the KFD0-RO-EX2 is equipped with LED indicators and provides space for labelling at the front, ensuring clear and straightforward identification. The module's compact dimensions and IP20 protection rating make it suitable for mounting on a 35 mm DIN rail, conforming to EN 60715 standards.
The KFD0-RO-EX2 is compliant with international safety and electromagnetic compatibility standards, including ATEX and IECEx certifications, which attest to its suitability for use in hazardous areas. This relay module is a robust and dependable choice for engineers and technicians looking to enhance the safety and efficiency of their control systems.
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Frequently Asked Questions
What is the function of this relay module?
The relay module is designed for intrinsic safety applications, capable of switching intrinsically safe circuits on the field side. It's commonly used for remote resets, fire alarm testing, or remote calibration of strain gauges.
Can this module be used in safety-related applications?
Yes, the module is suitable for use in safety-related applications and is rated up to SIL 3 according to IEC/EN 61508, ensuring a high level of reliability and safety integrity.
What type of input signal does the module accept?
The module accepts a logic input ranging from 15 V DC to 30 V DC, which is non-polarized and shares a common reference potential.
What are the power requirements for this module?
The module requires a rated voltage of 15 to 30 V DC and is loop powered, with a power dissipation of 0.8 W.
What is the ambient temperature range in which the module can operate?
The module can operate within an ambient temperature range of -20 to 65 °C, making it suitable for a variety of industrial environments.
What type of output does the module provide?
The module provides a relay contact output, allowing it to control a variety of field devices within an intrinsically safe circuit.
What is the maximum switching frequency of the module?
The module has a maximum switching frequency of less than 10 Hz, which is suitable for many control and monitoring applications.
How is the module protected against electrical issues?
Each input of the module is safeguarded by a fuse and an electronic current limiting feature to protect against overcurrent conditions.
What certifications does the module hold?
The module holds several certifications, including ATEX and IECEx, ensuring compliance with international safety standards for hazardous areas.
How is the module mounted for use?
The module is designed for mounting on a 35 mm DIN mounting rail according to EN 60715, facilitating easy installation in control panels.
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