
WAGO-I/O-SYSTEM 750 Table of Contents 3
750-652 Serial Interface RS-232 / RS-485
Manual
1.2.0
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Table of Contents
1Notes about this Documentation................................................................. 6
1.1 Validity of this Documentation................................................................. 6
1.2 Copyright................................................................................................... 6
1.3 Symbols..................................................................................................... 7
1.4 Number Notation....................................................................................... 9
1.5 Font Conventions ...................................................................................... 9
2Important Notes......................................................................................... 10
2.1 Legal Bases ............................................................................................. 10
2.1.1 Subject to Changes............................................................................. 10
2.1.2 Personnel Qualifications..................................................................... 10
2.1.3 Use of the 750 Series in Compliance with Underlying Provisions.... 10
2.1.4 Technical Condition of Specified Devices......................................... 11
2.2 Safety Advice (Precautions).................................................................... 12
3Device Description ..................................................................................... 14
3.1 View........................................................................................................ 18
3.2 Connectors............................................................................................... 19
3.2.1 Data Contacts/Internal Bus................................................................. 19
3.2.2 Power Jumper Contacts/Field Supply ................................................ 20
3.2.3 CAGE CLAMP®Connectors............................................................. 22
3.3 Display Elements .................................................................................... 23
3.4 Operating Elements................................................................................. 24
3.5 Schematic Diagram................................................................................. 24
3.6 Technical Data ........................................................................................ 25
3.6.1 Device Data ........................................................................................ 25
3.6.2 Supply................................................................................................. 25
3.6.3 Communication .................................................................................. 25
3.6.4 Interface.............................................................................................. 26
3.6.5 Climatic Environmental Conditions................................................... 26
3.7 Approvals................................................................................................ 27
3.8 Standards and Guidelines........................................................................ 27
4Process Image............................................................................................. 28
4.1 Operating Modes for Serial Transmission .............................................. 28
4.2 Data Exchange Mode.............................................................................. 30
5Function Description ................................................................................. 32
5.1 Operating Modes for Serial Transmission .............................................. 32
5.1.1 Transmit Data..................................................................................... 32
5.1.1.1 Continuous Transmission .............................................................. 32
5.1.2 Receive Data....................................................................................... 33
5.1.2.1 Continuous Receipt........................................................................ 33
5.1.3 RS-232 Operating Mode..................................................................... 34
5.1.3.1 Flow Control Using XON-/XOFF Protocol .................................. 34
5.1.3.2 Flow Control Using RTS/CTS....................................................... 34
5.1.3.3 Flow Control Using RTS/CTS, RTS with Lead/Follow-on Time. 34
5.1.4 RS-485 Operating Mode..................................................................... 35
5.1.5 RS-422 Operating Mode..................................................................... 35