Pepperl+Fuchs K-System isolated safety barrier system

Overview and Scope of Application

Pepperl+Fuchs K-System Isolation Barrier System Manual (DOCT0187Z), aimed at system integrators, equipment manufacturers, and certified electrical personnel, provides a product lifecycle usage guide covering selection, installation, wiring, configuration, operation, maintenance, and disassembly, suitable for intrinsically safe signal isolation in hazardous 0/1/2 zones.

Core specifications of the product

1. Function definition

The K-System isolation barrier is used for the protection of intrinsically safe circuits in hazardous areas, achieving electrical isolation between the field side and the control side, while also limiting voltage, current, and energy. It supports analog/digital/frequency/HART signal conditioning.

2. Shell size (3 standard widths)

Model series shell width characteristics

KC 12.5mm ultra-thin, high-density installation

KF 20mm universal type, most commonly used

KF/KH 40mm multifunctional/high-power type

3. Characteristics of wiring terminals

Type: Pluggable terminal block

Wire diameter: maximum 2.5mm ² (14AWG)

Torque: 0.5-0.6Nm

Anti mistake: Red coded sales to prevent accidental insertion

Optional: screw terminal/spring terminal/test socket

4. Color recognition rules

Color meaning

Green DC power supply equipment

Black AC power supply equipment

Gray AC/DC wide range power supply

Blue processing danger zone signal equipment

5. Status indicator light (NAMUR NE44)

Meaning of LED color status

The green constant light power supply is normal

Internal malfunction of the red constant light device

Red flashing external circuit fault

Yellow constant light switch action

6. Configuration method

DIP switch: Basic function settings

Rotary switch: range/mode selection

Potentiometer: Zero/Range Calibration

LC display+button: parameter visualization settings

PC software (PACTware): PC side configuration diagnosis

7. Power Supply and Power Rail Bus

Power Supply Type: 24V DC/115V AC/230V AC/Wide Voltage

Power Rail UPR-03: 3-core (2 power supplies+1 fault summary)

Power Rail UPR-05: 5 cores (2 power supplies+1 fault+2 data)

A single bus supports up to 80 devices and supplies 24V DC/4A power

Installation and wiring specifications

1. Installation requirements

Rail: 35mm DIN rail (EN 60715)

Installation direction: both vertical and horizontal

High temperature applications (≤ 70 ℃): require horizontal installation and spacing

KC：≥6mm； KF(20mm)：≥10mm； KF(40mm)：≥15mm

Protection: Installation box IP54 or above, pollution level * * ≤ 2**

2. Wiring safety rules

Live wiring/disconnection is strictly prohibited in hazardous areas

Maintain a distance between intrinsic safety circuits and non intrinsic safety circuits

Only one wire is connected to each terminal, and multiple wires need to be crimped to the terminal

Completely disconnect the power and conduct a power test before wiring

Operation and fault diagnosis

1. Types of fault monitoring

Line fault: broken wire, short circuit

Equipment failure: internal malfunction, power failure

Fault output: normally closed contact (fault disconnected)

2. Fault summary function

Realize unified alarm for multiple devices through Power Rail, and output relay signals from the power supply module to the control system.

3. Standard signal specifications

Current: 4-20mA (NAMUR NE43)

Voltage: 0-10V/0-5V

Fault interval:<3.6mA or>21mA

Dismantling, maintenance, and repair

Disassembly: Unlock the red buckle with a screwdriver and remove the device

Maintenance: Non repairable, direct replacement as a whole in case of malfunction

Environment: -20 ℃~+60 ℃, expandable up to 70 ℃

Protection level: IP20, flame retardant level UL94 V2

Model coding rules (core position)

1 digit: K=K-System2 digits: C/F/H=Width 3 digits: D/A/U=DC/AC/Width Voltage 4 digits: 2/5/6=24V/115V/230V5 digits: Function code (CR/ST/TT/SR, etc.)

Mechanical dimensions (typical)

KC(12.5mm)：12.5×119×114mm

KF(20mm)：20×107×115mm

KF(40mm)：40×107×115mm