YOKOGAWA Centum VP, Technical Information

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Toc-1
TI 33Q01J30-01E
CENTUM
Explosion Protection
CONTENTS
TI 33Q01J30-01E 37th Edition
Introduction ..............................................................................................................i
Safety Precautions ..................................................................................................ii
Trademarks ..............................................................................................................v
1. Overview of Explosion Protection ......................................................... 1-1
1.1 Primary Explosion Protection and Secondary Explosion Protection ........1-1
1.2 Explosion Protection Standards .....................................................................1-2
1.3 Classification of Explosion Protection Equipment .......................................1-3
1.4 Symbols That Indicate Specifications of Explosion Protection ..................1-8
2. CENTUM and Explosion Protection Instrumentation .......................... 2-1
2.1 Explosion Protection Standards that CENTUM has Acquired .....................2-1
2.2 Explosion Protection Construction that I/O Devices of CENTUM
Comply ...............................................................................................................2-2
2.3 Overview of Connecting CENTUM to the Devices Installed in a
Hazardous Area .................................................................................................2-3
3. Explosion Protection Instrumentation in Zone 2/Division 2 ............... 3-1
3.1 Non-Incendive ...................................................................................................3-1
3.1.1 CSA NI (CSA Non-Incendive) ............................................................ 3-1
3.1.2 FM NI (FM Nonincendive) ................................................................ 3-13
3.2 Ex “ec”, Type “n” ............................................................................................3-24
3.2.1 ATEX Ex “ec”, ATEX Type “n” .......................................................... 3-24
3.2.2 IECEx Ex “ec” , IECEx Type “n” ....................................................... 3-24
3.2.3 ECAS-Ex Ex “ec” ............................................................................. 3-25
3.2.4 UKEX Ex “ec”, UKEX Type “n” ......................................................... 3-25
3.2.5 KCs Ex “ec” ...................................................................................... 3-25
3.2.6 CCC-Ex/NEPSI Type “n” .................................................................. 3-26
4. Intrinsic Safety Explosion Protection Instrumentation ....................... 4-1
4.1 Intrinsic Safety Explosion Protection Instrumentation Using Barrier
base plates .........................................................................................................4-2
4.1.1 Intrinsic Safety Explosion Protection of ATEX/UKEX Standard ........ 4-2
4.1.2 Intrinsic Safety Explosion Protection of IEC Standard ...................... 4-3
4.1.3 Intrinsic Safety Explosion Protection of FM Standard ....................... 4-4
4.1.4 Intrinsic Safety Explosion Protection of CSA Standard ..................... 4-5
4.1.5 Intrinsic Safety Explosion Protection of EAC Ex ................................ 4-6
Nov. 10, 2022-00