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106 • PROFIBUS
Wiring
WAGO-I/O-SYSTEM 750
PROFIBUS
Further information
The PNO provides further documentation for its members in INTERNET:
- Technical descriptions
- Guidelines
http://www.profibus.com/
5.2 Wiring
On the PROFIBUS with RS 485 transmission technology all devices are
connected in a line structure. The bus line comprises of a twisted and screened
pair of wires.
The fieldbus line is specified in EN 50 170 as a line type A and must provide
certain line parameters. The line type B also described in the EN 50 170 is an
old type and should no longer be used.
Parameter Value
Wave resistance 135 ... 165 Ω
Operating capacity < 30 pF/m
Loop resistance 110 Ω/km
Wire diameter
*)
> 0.64 mm
Wire cross section
*)
> 0.34 mm
2
*)
The wire cross sections used must conform with connection possibilities on the bus plug.
Line type A allows maximum line lengths for a bus segment dependent upon
the transmission speed.
Transmission speed Max. bus segment length
9.6 / 19.2 / 45.45 / 93.75 kBaud 1200 m
187.5 kBaud 1000 m
500 kBaud 400 m
1500 kBaud 200 m
3000 / 6000 / 12000 kBaud 100 m
The plugs available on the market offer the possibility that arriving and
departing data cables can be directly connected to the plug. In this manner
drop cables are avoided and the bus plug can be connected to or disconnected
from the bus at any time without interrupting the data traffic. A cut-in type bus
connection is integrated in these plugs. Due to the capacitative load of the
subscribers and the resulting generated line reflection the connection plugs
used should have integrated length inductivity. This is indispensable for
transmission rates of > 1.5 MBaud.
- Modular I/O System 1
- PROFIBUS DP 1
- TABLE OF CONTENTS 3
- 1 Important Comments 5
- 1.2 Symbols 6
- 1.3 Font Conventions 7
- 1.4 Number Notation 7
- 1.5 Safety Notes 8
- 1.6 Scope 9
- 1.7 Abbreviation 9
- 2 The WAGO-I/O-SYSTEM 750 10
- 2.2 Technical Data 11
- 2.3 Manufacturing Number 14
- 2.5 Mechanical Setup 15
- 16 • The WAGO-I/O-SYSTEM 750 16
- Mechanical Setup 16
- 2.5.4 Spacing 17
- 2.5.6 Assembly Sequence 19
- 20 • The WAGO-I/O-SYSTEM 750 20
- 2.5.8 Power Contacts 21
- 2.5.9 Wire Connection 22
- 2.6 Power Supply 23
- Fieldbus 24
- Interface 24
- Electronic 24
- (5V) total 25
- (5 V) total 26
- 2.6.3 Field Supply 27
- The WAGO-I/O-SYSTEM 750 • 31 31
- Power Supply 31
- 2.6.5 Power Supply Unit 32
- 2.7 Grounding 33
- 2.7.2 Grounding Function 34
- 2.7.3 Grounding Protection 35
- 2.8 Shielding (Screening) 36
- 3 Fieldbus Coupler 38
- 3.1.1 Description 41
- 3.1.2 Hardware 42
- Hardware 43
- 3.1.2.4 Display Elements 45
- Configuration 47
- 3.1.3 Operating System 48
- 3.1.4 Process Image 49
- Process Image 50
- 3.1.4.3.11 4 AI I/O-Modules 54
- 3.1.4.3.12 2 AO I/O-Modules 54
- 3.1.4.3.13 4 AO I/O-Modules 55
- 3.1.4.3.14 Counter Modules 55
- 750-404, 750-638 55
- 750-631, 750-634, 750-637 57
- 3.1.5 Configuration 59
- 3.1.5.3 Example 62
- Configuring the Coupler 64
- Configuration of I/O Modules 67
- 3.1.8.1.2 4 DI I/O Modules 68
- 3.1.8.1.3 8 DI I/O Modules 69
- 3.1.8.1.5 2 DO I/O Modules 71
- 3.1.8.1.8 4 DO I/O Modules 74
- 3.1.8.1.9 8 DO I/O Modules 75
- 3.1.8.2.2 4 AI I/O Module 79
- 3.1.8.2.3 2 AO I/O Modules 80
- 3.1.8.2.4 4 AO I/O Modules 81
- 3.1.8.3.2 PWM Module 84
- 3.1.8.5 Serial Interfaces 88
- 3.1.9 Diagnostics 89
- 3.1.10 LED Signaling 96
- 3.1.10.2 Fieldbus Status 97
- 3.1.11 Fault Behavior 102
- 3.1.12 Technical Data 103
- 4 I/O Modules 104
- 5 PROFIBUS 105
- 5.2 Wiring 106
- 6 Glossary 108
- Glossary • 109 109
- WAGO-I/O-SYSTEM 750 109
- PROFIBUS 109
- 7 Literature list 110
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