Table Of Contents - Beckhoff EL1904 Operating Instructions Manual

Table of contents

1 Notes on the documentation.................................................................................................................... 5
1.1 Disclaimer.......................................................................................................................................... 5
1.1.1 Trademarks ........................................................................................................................ 5
1.1.2 Patents ............................................................................................................................... 5
1.1.3 Limitation of liability ............................................................................................................ 6
1.1.4 Copyright............................................................................................................................ 6
1.2 Documentation issue status .............................................................................................................. 7
1.3 Staff qualification ............................................................................................................................... 8
1.4 Safety and instruction........................................................................................................................ 9
1.4.1 Explanation of symbols ...................................................................................................... 9
1.5 Beckhoff Support and Service......................................................................................................... 10
2 For your safety ........................................................................................................................................ 11
2.1 Duty of care ..................................................................................................................................... 11
2.2 Safety image signs .......................................................................................................................... 12
2.3 General safety instructions.............................................................................................................. 13
2.3.1 Before operation............................................................................................................... 13
2.3.2 In operation ...................................................................................................................... 13
2.3.3 After operation.................................................................................................................. 13
3 System description ................................................................................................................................. 14
3.1 The Beckhoff Bus Terminal system ................................................................................................ 14
3.1.1 Bus Coupler ..................................................................................................................... 15
3.1.2 Bus Terminals .................................................................................................................. 16
3.1.3 E-bus................................................................................................................................ 16
3.1.4 Power contacts................................................................................................................. 16
3.2 TwinSAFE ....................................................................................................................................... 17
3.2.1 The I/O construction kit is extended safely ...................................................................... 17
3.2.2 Safety concept ................................................................................................................. 17
3.2.3 EL1904, EL2904 - Bus Terminals with 4 fail-safe inputs or outputs................................. 18
3.2.4 EL6900 - TwinSAFE logic terminal .................................................................................. 18
3.2.5 The fail-safe principle (Fail Stop) ..................................................................................... 18
4 Product description ................................................................................................................................ 19
4.1 EL1904 - TwinSAFE terminal with 4 digital fail-safe inputs ............................................................ 19
4.2 Intended use ................................................................................................................................... 20
4.3 Technical data ................................................................................................................................. 22
4.4 Safety parameters ........................................................................................................................... 23
4.5 Characteristic curve of the inputs .................................................................................................... 24
4.6 Dimensions ..................................................................................................................................... 25
4.7 Block diagram of the EL1904 .......................................................................................................... 25
5 Operation ................................................................................................................................................. 26
5.1 Environmental conditions ................................................................................................................ 26
5.2 Installation ....................................................................................................................................... 26
5.2.1 Safety instructions............................................................................................................ 26
5.2.2 Transport / storage........................................................................................................... 26
EL1904 Version: 3.0.0
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