Table Of Contents - Beckhoff EL2904 Operating Instructions Manual

Table of contents

1 Foreword .................................................................................................................................................... 5
1.1 Notes on the documentation.............................................................................................................. 5
1.2 Safety instructions ............................................................................................................................. 6
1.2.1 Delivery state ..................................................................................................................... 6
1.2.2 Operator's obligation to exercise diligence ........................................................................ 6
1.2.3 Description of instructions.................................................................................................. 7
1.3 Documentation issue status .............................................................................................................. 8
2 System description ................................................................................................................................. 10
2.1 The Beckhoff Bus Terminal system ................................................................................................. 10
2.1.1 Bus Coupler ..................................................................................................................... 11
2.1.2 Bus Terminals.................................................................................................................. 12
2.1.3 E-bus ............................................................................................................................... 12
2.1.4 Power contacts ................................................................................................................ 12
2.2 TwinSAFE........................................................................................................................................ 13
2.2.1 The I/O construction kit is extended safely ...................................................................... 13
2.2.2 Safety concept ................................................................................................................. 13
2.2.3 EL1904, EL2904 - Bus Terminals with 4 fail-safe inputs or outputs ................................ 14
2.2.4 EL6900 - TwinSAFE logic terminal .................................................................................. 14
2.2.5 The fail-safe principle (Fail Stop) ..................................................................................... 14
3 Product description................................................................................................................................. 15
3.1 EL2904 - TwinSAFE terminal with 4 digital fail-safe outputs .......................................................... 15
3.2 Intended use .................................................................................................................................... 16
3.3 Technical data ................................................................................................................................. 18
3.4 Safety parameters ........................................................................................................................... 19
3.5 Dimensions ...................................................................................................................................... 20
3.6 Block diagram of the EL2904 .......................................................................................................... 21
4 Operation.................................................................................................................................................. 22
4.1 Environmental conditions ................................................................................................................ 22
4.2 Installation ....................................................................................................................................... 22
4.2.1 Safety instructions ........................................................................................................... 22
4.2.2 Transport / storage .......................................................................................................... 22
4.2.3 Electrical installation ........................................................................................................ 22
4.2.4 Mechanical installation..................................................................................................... 27
4.2.5 TwinSAFE reaction times ................................................................................................ 32
4.2.6 Tested EL2904 devices ................................................................................................... 33
4.3 Operation in potentially explosive atmospheres (ATEX) ................................................................. 34
4.3.1 Special conditions............................................................................................................ 34
4.3.2 Identification..................................................................................................................... 34
4.3.3 Date code and serial number........................................................................................... 35
4.3.4 Further ATEX documentation .......................................................................................... 35
4.4 Configuration of the terminal in TwinCAT ........................................................................................ 35
4.4.1 Inserting a Bus Coupler ................................................................................................... 35
4.4.2 Inserting a Bus Terminal.................................................................................................. 35
EL2904 Version: 2.3.0
Table of contents
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