Clipsal C-Bus Instruction Manual Page 44
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C-Bus™ Basic Programming 1250SM0904R10/09
C-Bus™ Products Training Course 10/2009
38 © 2009 Schneider Electric. All Rights Reserved.
Network Burdens
A C-Bus Network Burden is simply a resistor and capacitor circuit that is
placed across the positive and negative C-Bus pairs. Its purpose is to
provide the C-Bus network with a standard impedance, ensuring
communications are stable and reliable.
All C-Bus networks should have a network impedance between 400 to 1500
Ohms. A network burden should only be connected to the network to adjust
the impedance between these two values.
It is recommended that each C-Bus network have a maximum of one
Network Burden. However, due to cable capacitance, the number of units
and the number of C-Bus Power Supplies, a Network Burden may or may
not be required.
NOTE: The table below is developed as a rough indicator to see if a
Network Burden may be needed on the C-Bus network. The number of
C-Bus units used and C-Bus Cable length will affect the need for adding or
removing a Network Burden.
Network Burden Requirement Number of C-Bus Units
Network Burden required < 50 C-Bus units
May require a Network Burden > 50 C-Bus units or < 70 C-Bus units
Should not require a Network Burden > 70 C-Bus units
Table 18 - Network burden requirement guide
There are two styles of C-Bus Network Burden:
Hardware Network Burden.
Software Enabled Network Burden.
A hardware Network Burden is a physical device. It comes in the form of an
RJ45 plug with red heat shrink surrounding the resistor and capacitor circuit.
A software-enabled Network Burden is embedded into various C-Bus units,
and is enabled and disabled via the Toolkit software or Learn Mode.
Software-enabled Network Burdens are available in a wide range of C-Bus
units. The list below identifies some of the units with software-enabled
Network Burdens:
All output units
System Support Devices (PC Interfaces, Touch Screens, Network
Bridges etc).
- Basic Programming 1
- Products Training Course 1
- Please Note 3
- Class B FCC Statement 3
- Safety Precautions 4
- Clipsal Introduction 7
- What Is C-Bus? 8
- Why Use C-Bus? 9
- Functionality 10
- Simple Wiring 10
- C-Bus Principles 13
- C-Bus Power Supply 14
- PC Interface 14
- Network Bridges 15
- Input Units 16
- C-Bus Wall Switches 17
- C-Bus Sensors 18
- Miscellaneous Inputs 20
- Output Units 21
- C-Bus Dimmers 23
- Maximum Load Calculations 25
- Fluorescent Dimming 27
- IR Transmitter 28
- Software 29
- C-Bus Cable 30
- Cable Current 31
- Cable Terminations 31
- 1 2 3 4 5 6 7 8 32
- Cable Topologies 33
- C-Bus Units 36
- C-Bus Voltage 37
- Power Supply Placement 38
- 1 km of C-Bus Cable 39
- Over Voltage Protection 40
- C-Bus Current 41
- C-Bus Current Consumption 42
- C-Bus Clock 43
- Network Burdens 44
- Mains Segregation 45
- Learn Mode 47
- Selecting Output Channels 48
- Learn Mode Operations 49
- Timer Configurations 50
- Super Learn Mode 51
- C-Bus Addressing 53
- C-Bus Toolkit 54
- 5500NB 5500NB 5500NB 5500NB 54
- Network Address 56
- Network 254 56
- Network 253 56
- Group Address 001 60
- Group Address 002 60
- Group Address 003 60
- Group Address 004 60
- Group Address 01 61
- C-Bus Tags 62
- How C-Bus Works 63
- L5504D2U 65
- L5504RVF 65
- 5084NL 5082NL 65
- C-Bus Message Types 66
- Status Report Interval 66
- C-Bus Into to Toolkit 67
- C-Bus Toolkit Overview 68
- The C-Gate Console 69
- The Toolkit Main Menu 70
- The Navigation Tree 71
- The Toolbar 73
- Installing USB Drivers 80
- Creating a Project 80
- Editing a Network 82
- Creating Group Addresses 83
- Add Units to Database 84
- Adding Units Manually 85
- Scanning a Network 90
- Readdressing C-Bus Units 92
- Serial Number Readdress 94
- Application Log 96
- Programming C-Bus Units 97
- DIN Rail Relays 98
- Channel 1 101
- Logic Group 101
- Channel 2 101
- Turn On Tab 102
- Recovery Tab 103
- Restrike Delay Tab 104
- Global Tab 105
- Status Tab 106
- DIN Rail Dimmers 107
- Logic Tab 108
- Min/Max Tab 112
- Dual Applications 117
- Indicators 119
- Disable All Keys 121
- Corridor Linking 123
- Timing Parameters 123
- Micro Functions 125
- Passive Infrared Sensors 128
- PIR Function Details 129
- Sensor Enable/Disable 130
- False Triggering Sensors 130
- Light Level Sensors 131
- Remote Triggering Scenes 136
- Variants 141
- Labelling Scenes 142
- C-Bus Diagnostics 143
- Analysis Tools 144
- Multimeter 145
- Oscilloscope 146
- Diagnostic Utility 146
- Diagnostic Utility Setup 147
- Support and Training 148
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