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Intrinsic Safety, Barriers and Isolators


The ATEX Directive its effect on instrumentation in hazardous areas
A definitive guide to earthing and bonding in hazardous areas.
Barriers by application
Choosing Barriers by Application
MTL 700 Series Barriers

Questions on Intrinsic Safety or Ex equipment? See ICEweb's Electrical Equipment in Hazardous Areas
Technical Information Page

Looking for Intrinsic safety in Fieldbus Systems? See ICEweb's Fieldbus page.

For Information on Selection, Installation and Maintenance of Electrical equipment in Hazardous Areas and other protection concepts + HA Classification see ICEweb's Electrical Equipment in Hazardous Areas Technical Information page.

Other Information
Intrinsically Safe Fire Protection Devices-from System Sensor
Load Cell Intrinsically Safe Installation Application Note - Ian Fellows Ltd
Intrinsic Safety Basics - from Omega.com
Intrinsic Safety Circuit Design
- Paul S. Babiarz and Omega.com

EXia Intrinsically Safe Mobile Phone-At last a mobile phone that can be used in Australian Hazardous Areas, from dca intrinsically safe products


The following excellent technical papers are from RTK engineering in the UK
Assembling an Intrinsically Safe System
Cables for I.S. installations
Intrinsically Safe loadcell installations
Protecting the I.S. system from outside influences
Simple Apparatus – or not so simple?
The basics of Intrinsic Safety
The earthing of Zener Barrier installations
Uwhat? – Understanding I.S. terminology
Zener Barriers or Isolation Interfaces?


  The Following Intrinsic Safety Technical Manual is from Cooper Crouse-Hinds and covers;
- Determining Safe Energy Levels
- Intrinsically Safe Barriers - Grounded Zener Barrier  - Isolation Barriers- Remote I/O Products
- Selecting the Proper Product for Your Intrinsically Safe Application
- Installation, Maintenance & Troubleshooting of Intrinsically Safe Circuits 


MTL Australia Technical Information - Some good technical papers here
Barriers bring hazardous-area stress relief
Remote Load Cell Monitoring in hazardous areas using an IS fieldbus
Practical solutions for Fieldbus in hazardous areas
Cost comparison of methods of explosion protection
Shunt-Diode Safety Barriers and Galvanic Isolators – a Critical Comparison
Intrinsic Safety - The Appropriate Technique For Zone 2.
AN9003 A user's guide to intrinsic safety - This is a really excellent reference.

MTL Luton UK Technical Information - You will have to register to get access- it is quick, easy and worth it!
You can request paper copies of:
AN9003 A user's guide to intrinsic safety
AN9007 A user's guide to shunt-diode safety barriers
AN9010 A user's guide to the MTL800 Series multiplexers
AN9013 A user's guide to MTL4000 Series isolating interface units
TP1092 ESD link for gas tanker cargo transfer *
TP1096 Temperature transmitters: 'Smart' 'Not-so-smart' and 'Dumb' *
TP1099 Intrinsic safety -- its widening horizons *
TP1100 European Code of Practice for Intrinsically-Safe Instrumentation *
TP1101 Using Smart transmitters in IS systems *


Australian Standards for Electrical Apparatus in Hazardous Areas

Competency Based Ex Training Courses and some very useful abridged short notes are available via our sponsor INLEC ENGINEERING
These cover:
Nature of fire and explosions
Australian Standards
Maintenance
Hazardous Area Classification
Installation Testing
Equipment Installation
Protection Techniques
Inspection