BECKHOFF CX50x0 - Manual (Page 3)

Table of Contents
CX50x0 units in potentially explosive areas
Table of Contents
1 Foreword 1
1.1 Notes on the documentation 1
1.1.1 Disclaimer 1
1.1.2 Trademarks 1
1.1.3 Patent Pending 1
1.1.4 Copyright 1
1.1.5 Delivery conditions 1
1.2 Safety instructions 2
1.2.1 Delivery state 2
1.2.2 Operator's obligation to exercise diligence 2
1.2.3 Description of safety symbols 3
1.3 Validation 4
2 Notes about operation in potentially explosive areas 5
2.1 Special conditions 5
2.2 Marking 6
2.3 Serial number 6
2.4 Terminal Specific Documentation 6
3 Basic principles of explosion protection 9
3.1 Why explosion protection? 9
3.2 Components from Beckhoff 10
3.3 Marking of equipment 10
3.4 Classification of electrical equipment into protection groups 11
3.5 Classification of surrounding atmosphere into zones 12
3.6 Usability of electrical equipment 13
3.6.1 Equipment category 13
3.6.2 Types of protection for electrical equipment 13
3.6.3 Temperature class 14
3.7 Safety barriers – cross-zone circuits 14
4 Appendix 15
4.1 Beckhoff Support and Service 15
4.1.1 Beckhoff branches and partner companies Beckhoff Support 15
4.1.2 Beckhoff company headquarters 15