Manual

TWT10XZO Triplicated Watchdog Timer User Manual
Table of Contents
TABLE OF CONTENTS
Chapter 1 - Introduction and technical data
1.1 Purpose..................................................................................................................... 1-1
1.2 Associated documentation ....................................................................................... 1-2
1.3 Specification ............................................................................................................ 1-2
1.4 Environmental specifications................................................................................... 1-3
1.5 External connections................................................................................................ 1-4
1.6 Transport and handling ............................................................................................ 1-4
Chapter 2 - Technical description
2.1 Physical .................................................................................................................... 2-1
2.1.1 Relay Modules ........................................................................................ 2-1
2.2 Theory of operation ................................................................................................. 2-2
2.2.1 Operating modes ..................................................................................... 2-2
2.2.2 Operation ................................................................................................ 2-2
2.2.3 Signal interface ....................................................................................... 2-4
2.3 Power supplies ......................................................................................................... 2-4
Chapter 3 - Servicing
3.1 Scope........................................................................................................................ 3-1
3.1.1 Safety relay ............................................................................................. 3-1
3.1.2 Daughterboard ........................................................................................ 3-1
3.2 Functional testing..................................................................................................... 3-1
Chapter 4 - Service support
4.1 Spare parts................................................................................................................ 4-1
4.2 List of spares ............................................................................................................ 4-1
Chapter 5 - Glossary of terms
5.1 Glossary of terms ..................................................................................................... 5-1
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