p+F safety barrier KCD2-SCD-EX1 in stock

Brand

P+F/Pepperl+Fuchs (Germany)

Application Areas

Chemical, Petroleum, Mining, Electronics/Batteries, General Industry

P+F Safety Barrier Introduction

P+F safety barriers, also known as safety limiters, are an important component of intrinsically safe systems.

P+F safety barriers are mainly divided into two categories: Zener barriers and isolation barriers.

The core components of a Zener barrier are a Zener diode, a current-limiting resistor, and a fast-blow fuse.

Isolation barriers not only limit energy but also provide isolation. They mainly consist of a loop limiting unit, a signal and power isolation unit, and a signal processing unit.

The main function of a P+F safety barrier is to limit current and voltage, ensuring that the energy available to field instruments remains within safe limits.

P+F Safety Barrier Alternatives

P+F safety barriers are also known as safety retainers. They are safety interfaces for intrinsically safe circuits, enabling bidirectional transmission of electrical signals between the safe zone (intrinsically safe) and the hazardous zone (non-intrinsically safe), and limiting the transfer of energy from the hazardous zone to the safe zone due to a fault. Generally, safety barriers are available in Zener and isolation types.

Intrinsically safe safety barriers are used in the design of intrinsically safe explosion-proof systems. They are devices installed in safe locations and contain both intrinsically safe and non-intrinsically safe circuits. The circuitry uses current-limiting and voltage-limiting circuits to restrict the energy sent to the intrinsically safe circuit in the field, thus preventing dangerous energy from non-intrinsically safe circuits from entering the intrinsically safe circuit. In intrinsically safe explosion-proof systems, these are called associated devices and are an important component of the system.

Intrinsically safe explosion-proof system associated devices refer to electrical devices installed in safe locations that connect intrinsically safe electrical equipment to non-intrinsically safe electrical equipment.

Because safety barriers are designed as an energy-limiting interface between field equipment and control room equipment, they ensure that the energy transmitted to field equipment is intrinsically safe, regardless of whether the control room equipment is in a normal or faulty state.

The China National Instrument and Meter Explosion-Proof Safety Supervision Station is the agency in the People's Republic of China that supervises the production of explosion-proof products. It has strict, scientific, and detailed regulations for intrinsically safe safety barriers. Only enterprises certified by this station and their products possess the safety performance required by the standards; otherwise, it may cause incalculable damage to the user's equipment, personnel, and production.

Advantages of p+F Safety Barrier Applications:

① Although isolated safety barriers are more expensive than Zener barriers, their numerous advantages and features offer significant convenience to users, leading to a growing preference for them.

② Isolated safety barriers effectively isolate field circuit signals from safe circuit signals. This eliminates the need for intrinsically safe grounding systems in intrinsically safe control systems, simplifying construction.

③ Isolated safety barriers greatly enhance the anti-interference capabilities of detection and control circuits, improving system reliability.

④ Isolated safety barriers allow for grounding of field instruments, permitting non-isolated field instruments.

⑤ Isolated safety barriers have numerous protective circuits, reducing the likelihood of accidental damage and allowing for live maintenance of field instruments, thus shortening start-up preparation time and minimizing downtime.

⑥ Isolated safety barriers possess strong signal processing capabilities. For example, they can convert switch input status control, mV, and Pt100 to 4~20mA, providing greater convenience, rationality, and effectiveness for the application of field instruments and control systems. ⑦ When users simultaneously utilize DCS and ESD, selecting a one-input, two-output safety barrier can effectively isolate the two systems, preventing mutual interference.

⑧ Loop-powered isolation safety barriers retain the advantages of active isolation safety barriers while offering the ease of wiring found in Zener barriers. They do not require a separate 24V power supply, making them particularly suitable for DCS systems with direct I/O card power supply.

KFD2-SR2-EX2.W

KFD2-SR2-EX1.W.LB

KFA6-SR2-EX1.W

K-CJC-BU

KC-CJC-1BU

K-LB-1.30

K-LB-1.30G

K-LB-2.30

K-LB-2.30G

K-LB-2.6

K-LB-2.6G

K-LB-1.6

KFD2-STC5-1

KFD2-SOT3-EX2

KCD2-STC-1.20

UPR-03

KFD0-RSH-1

K-ADP-USB

KFD2-UT2-1

KFD2-CRG2-Ex1.D

KFD2-UFC-EX1.D

KCD2-SR-EX2

KCD2-UT2-1

KCD2-STC-1

KCD2-SCD-1 KFD2-STC5-EX1

KFD2-STC5-EX1.2O

KCD2-STC-EX1.20

KCD2-STC-1.2O

KFD2-STC5-1.2O

KCD2-UT2-EX1

KFD2-UT2-EX2

KFD2-UT2-EX1

KFD2-STC5-EX2

KFD2-CD-EX1.32

KFD2-EB2.R4A.B

KFD0-SD2-EX1.1045

KCD0-SD-EX1.1245

KFD2-VR4-EX1.26

KCD2-RR-EX1

KFD2-SCD-EX1.LK

KFD2-SCD2-Ex2.LK

KFD2-SCD2-EX1.LK

KCD2-SR-EX1.LB

KCD2-SOT-EX1.LB KFD2-SR2-EX1.W

p+F Safety Barrier

Our company mainly deals in European and American brands and can source brands from any European country. For example, our key German brands include: BURKERT, DEMAG, HAWE, REXROTH, HYDAC, PILZ relays, FESTO, IFM sensors, E+H, HEIDENHAIN, P+F sensors, SICK, TURCK, and HIRSCHMANN industrial switches. German brands: Hengstler, Murr, Schmersal, Samson, EPRO (Emerson's subsidiary), MOOG (USA), ASCO (USA), MAC (USA), NUMATICS (USA), PARKER (USA), VICKERS (USA), ROSS (USA), Norgren (UK), OMAL (Italy), ATOS (Italy), CAMOZZI (Italy), UNIVER (Italy), and Camozzi (Italy).