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IEC61375-4-WTB ppt
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2018-04-09
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Train Communication Network IEC 61375 - 4 Wire Train Bus This is the train bus standardized in IEC 61375 for interconnecting rail vehicles 1. Applications in rail vehicles 2. Physical layer a. Electrical RS 485 b. Middle-Distance c. Fibre Optics 3. Device Classes 4. Frames and Telegrams 5. Medium Allocation 6. Clock Synchronization 7. Fault-tolerance concept 8. Integrity Concept 9. Summary
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Wire Train Bus
1
IEC Train Communication Network
IEC 61375 Clause 4
1999 September, HK
Train Communication Network
IEC 61375 - 4
Wire Train Bus
This is the train bus standardized in IEC 61375
for interconnecting rail vehicles
Introduction
Wire Train Bus
2
IEC Train Communication Network
IEC 61375 Clause 4
1999 September, HK
WTB Outline
1. Applications in rail vehicles
2. Physical layer
1. Electrical RS 485
4. Frames and Telegrams
5. Medium Allocation
7. Fault-tolerance concept
8. Integrity Concept
2. Middle-Distance
3. Fibre Optics
9. Summary
3. Device Classes
6. Clock Synchronization
Wire Train Bus
3
IEC Train Communication Network
IEC 61375 Clause 4
1999 September, HK
Wire Train Bus
based on DB-bus, FS-ETR450 and SBB Huckepackexperience:
1'000'000 bit/seconddata rate:
32 nodesnumber of devices:
860 mcovered distance:
"inauguration" assigns each node its address and orientationconfiguration:
25 msdata period:
trunk cable
jumper
nodenode node
Wire Train Bus
4
IEC Train Communication Network
IEC 61375 Clause 4
1999 September, HK
WTB Structure
shielded, twisted wire pair at 1 Mbit/s with Manchester II encoding
one master (any node may become back-up master)
860 m (22 UIC vehicles) and supports up to 32 nodes.
standard HDLC (IEC 3309) controllers.
medium:
control:
distance:
link protocol:
+ -
intermediate node(s)end node
trunk cable
jumper cable
+ -
bus controllers
+ -+ -
bus controllers
terminators
(inserted)
2 channels
+ -+ -
bus controllers
+-
end node
+-
bus controllers
terminators
(inserted)
2 channels
1 channel active 1 channel active
Wire Train Bus
5
IEC Train Communication Network
IEC 61375 Clause 4
1999 September, HK
encoder decoder
Train Bus Node
For the purpose of train inauguration, each node has two independent
channels, a main and an auxiliary (HDLC) channel
terminator
switches
direction 1 direction 2
Kb
bus switch
Rt1 Kt1
Rt2
Kt2
direction
commutator
main
channel
auxiliary
channel
HDLC
controllers
transceivers
Manchester
encoder/decoder
encoder decoder
One channel is connected to each direction in an end node
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- incomer20112022-09-22#完美解决问题
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