Pepperl+Fuchs Z-System Manual
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Pepperl+Fuchs Z-System Manual

Pepperl+Fuchs Z-System Manual

Zener barriers
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MANUAL
Z-System
Zener Barriers
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Summary of Contents for Pepperl+Fuchs Z-System

  • Page 1 PROCESS AUTOMATION MANUAL Z-System Zener Barriers По вопросам продаж и поддержки обращайтесь: Нижний Новгород (831)429-08-12 Смоленск (4812)29-41-54 Архангельск (8182)63-90-72 Калининград (4012)72-03-81 Новокузнецк (3843)20-46-81 Сочи (862)225-72-31 Астана +7(7172)727-132 Калуга (4842)92-23-67 Новосибирск (383)227-86-73 Ставрополь (8652)20-65-13 Белгород (4722)40-23-64 Кемерово (3842)65-04-62 Орел (4862)44-53-42 Тверь (4822)63-31-35 Брянск...
  • Page 2 Z-System – Zener Barriers With regard to the supply of products, the current issue of the following document is applicable: The General Terms of Delivery for Products and Services of the Electrical Industry, published by the Central Association of the Electrical Industry (Zentralverband Elektrotechnik und Elektroindustrie (ZVEI) e.V.) in its most recent version as well as the supplementary clause:...

  • Page 3: Table Of Contents

    Z-System – Zener Barriers Content 1 Introduction........4 1.1 Contents .

  • Page 4: Introduction

    Z-System – Zener Barriers Introduction Introduction Contents This document contains information that you need in order to use your product throughout the applicable stages of the product life cycle. These can include the following: • Product identification • Delivery, transport, and storage •...

  • Page 5: Target Group, Personnel

    Z-System – Zener Barriers Introduction Target Group, Personnel Responsibility for planning, assembly, commissioning, operation, maintenance, and dismounting lies with the plant operator. Only appropriately trained and qualified personnel may carry out mounting, installation, commissioning, operation, maintenance, and dismounting of the product.
  • Page 6 Z-System – Zener Barriers Introduction Informative Symbols Note! This symbol brings important information to your attention. Action This symbol indicates a paragraph with instructions. You are prompted to perform an action or a sequence of actions.

  • Page 7: Product Specifications

    Actuator Figure 2.1 Zener barrier function The Z-System zener barriers have a full range of products for AC and DC intrinsic safety applications with over 75 different models. 1-, 2- and 3-channel versions are available for quick and easy installation.
  • Page 8 Z-System – Zener Barriers Product Specifications 2.1.1 Principal Assembly Zener barriers have the following assembly. ZD2 ZD3 Zone 0, 1, 2 Zone 2 Div. 1, 2 Div. 2 Figure 2.3 Zener barrier function Zener diode Current limiting resistor Fuse Ground connection...
  • Page 9 • Voltage 1.5 V • Current 0.1 A • Power 25 mW Pepperl+Fuchs zener barriers are identified in terms of: • Voltage, i. e. 10 V • Resistance. i. e. 50  • Polarity, i. e. positive polarity...
  • Page 10 Pepperl+Fuchs zener barriers have a low series resistance, given by the sum of the resistance (R) and the resistance value of the fuse (F). Due to the low series resistance, an inadvertent short circuiting of the terminals on the filed side can cause the fuse to open.
  • Page 11 Pepperl+Fuchs zener barriers can be used in many applications. In the simplest case, a 1-channel zener barrier with a ground connection is used. But in many applications it is not desirable that the intrinsically safe circuit is connected directly to ground.

  • Page 12: Housing Style

    Product Specifications Housing Style The Z-System is a modular product range that features a space saving 12.5 mm wide housing and can incorporate up to 3 channels. The zener barriers are epoxy filled. Zener barriers are designed for degree of protection IP20.

  • Page 13: Color Identification

    Z-System – Zener Barriers Product Specifications Color Identification The color identification of the devices has the following meaning: • Red (1) indicates DC devices with positive polarity. • Black (2) indicates DC devices with negative polarity. • Gray (3) indicates AC devices.

  • Page 14: Label Carrier

    Z-System – Zener Barriers Product Specifications Label Carrier The device has a label carrier on the front side for individual marking. Figure 2.8 Label carrier on the front side Label ZH-ES/LB with labeling field 29 mm x 8 mm Label carrier ZH-Z.BT...

  • Page 15: Installation

    Z-System – Zener Barriers Installation Installation DIN Mounting Rail The devices are mounted on a 35 mm DIN mounting rail according to EN 60715. Figure 3.1 Example: DIN mounting rail (35 mm x 15 mm)

  • Page 16: Mounting

    Z-System – Zener Barriers Installation Mounting Mounting in the Non-Hazardous Area Mounting the Device Snap the device onto the DIN mounting rail. See figure below. Mounting in Zone 2 For mounting in the hazardous area observe the following warning messages.

  • Page 17: Connection

    Z-System – Zener Barriers Installation Connection Danger! Explosion hazard from wrong or missing grounding Wrong or missing grounding can cause sparks. This can ignite the surrounding potentially explosive atmosphere. • Ground the device. Observe the grounding requirements for type of protection Ex i according to IEC/EN 60079–14.
  • Page 18 Z-System – Zener Barriers Installation Connecting Circuits 1. Ground the device. Use the integrated ground connection of the zener barrier for grounding. The conductor cross-section of the ground connection, using a copper conductor, must be at least 4 mm² (12 AWG).
  • Page 19 The system must have its own independent ground conductor, through which no supply system current flows. The Z-system grounding is made by an integrated ground connection in the base of each zener barrier. By connecting each zener barrier to the 35 mm DIN mounting rail, the total system can be grounded via a single point.
  • Page 20 Z-System – Zener Barriers Installation Figure 3.5 Equipotential bonding via the DIN mounting rail Terminal block USLKG5 Zener barrier 35 mm DIN mounting rail according to EN 60715 Figure 3.6 Insulated mounting (group grounding) Terminal block USLKG5 Zener barrier 35 mm DIN mounting rail according to EN 60715...
  • Page 21 Z-System – Zener Barriers Installation Figure 3.7 Insulated mounting (individual grounding) Single socket ZH-Z.ES Zener barrier 35 mm DIN mounting rail according to EN 60715 Adapter ZH-Z.AB/SS Grounding bar ZH-Z.NLS-Cu3/10 Grounding bar feed ZH-Z.LL Spacer ZH-Z.AR.125 Terminal ZH-Z.AK16...
  • Page 22 Z-System – Zener Barriers Installation 3.3.2 Grounding with Multi-Channel Zener Barriers Analog circuits are often connected to 2-channel zener barriers, see Figure 3.9. Since there is no grounding on this type of circuit, the system is a quasi-floating one. Because it is one zener voltage above the ground potential. Although it does not actually float, the signal-to-noise ratio is improved.

  • Page 23: Operation

    Z-System – Zener Barriers Operation Operation Operation in the Non-Hazardous Area Danger! Explosion hazard from wrong or missing grounding Wrong or missing grounding can cause sparks. This can ignite the surrounding potentially explosive atmosphere. • Ground the device. Observe the grounding requirements for type of protection Ex i according to IEC/EN 60079–14.

  • Page 24: Maintenance, Repair, And Dismounting

    Z-System – Zener Barriers Maintenance, Repair, and Dismounting Maintenance, Repair, and Dismounting Danger! Danger to life from using damaged or repaired devices. Using a defective or repaired device can compromise its function and its electrical safety. • Do not use a damaged or polluted device.

  • Page 25: Technical Specifications

    Z-System – Zener Barriers Technical Specifications Technical Specifications Typical Characteristics The following are typical characteristics used in the description of a zener barrier. Working voltage at 10 µA The maximum voltage that can be applied between the terminals in the non- hazardous area and ground at a defined leakage current.

  • Page 26: Technical Data

    Z-System – Zener Barriers Technical Specifications Technical Data Mechanical Specifications Mounting Snap-on 35 mm DIN mounting rail according to EN 60715 Housing Material Polycarbonate (PC) Dimensions Dimension drawings refer to chapter Dimensions. Degree of Protection IP20 according to EN 60529...
  • Page 27 Z-System – Zener Barriers Technical Specifications Accessories Mounting Accessories For the different grounding options special accessories are needed. See chapter 3.3.1. Equipotential bonding via • Terminal block USLKG5 DIN mounting rail • 35 mm DIN mounting rail according to EN 60715 Group grounding through •...

  • Page 28: Order Designation

    Z-System – Zener Barriers Technical Specifications Order Designation 4 Special function, if available 3 Version 2 Polarity 1 System Position 1 Z-System Position 2 DC device with positive polarity DC device with positive polarity DC device with negative polarity AC device Position 4 With increased nominal resistance 1 k...

  • Page 29: Dimensions

    Z-System – Zener Barriers Technical Specifications Dimensions 6.4.1 Housing Types Zener Barriers Z-System 12.5 Figure 6.1...
  • Page 30 PROCESS AUTOMATION – PROTECTING YOUR PROCESS По вопросам продаж и поддержки обращайтесь: Нижний Новгород (831)429-08-12 Смоленск (4812)29-41-54 Архангельск (8182)63-90-72 Калининград (4012)72-03-81 Новокузнецк (3843)20-46-81 Сочи (862)225-72-31 Астана +7(7172)727-132 Калуга (4842)92-23-67 Новосибирск (383)227-86-73 Ставрополь (8652)20-65-13 Белгород (4722)40-23-64 Кемерово (3842)65-04-62 Орел (4862)44-53-42 Тверь (4822)63-31-35 Брянск...

Table of Contents