chapter2-mang thong tin cong nghiep

7/30/2019 Chapter2-Mang Thong Tin Cong Nghiep

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Bus Physics & Wiring

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Mi trng truyn dn ca PROFIBUS v lp tchng:

Cp ng

Cp quang

Cc phn t thu pht hng ngoi v RF


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PROFIBUS l da trn RS485...

Network consists ofRS485 segments

Properinstallation

required


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PROFIBUS - Cc on mng

Connected viarepeaters

M t o n m ng m i r ai khi cn m rngk ho ng c c h ho c s lng cc t rm truynthng


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Cc oan mng PROFIBUS - Repeater

Segment 2

Segment 1

Isolation

Segment 1


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Cc on mng PROFIBUS - Nodes/Devices

Up to 126 addressable nodes per network

Up to 32 devices per segment

RepeaterPROFIBUSNodes (e.g. I/O)

Optical LinkModules(OLMs)

What counts as device?


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Cc oan mng PROFIBUS V d

Address #0 Address #30 Address #31 Address #60

Ad dr es s # 90 Ad dr es s # 61A dd re ss # 12 0 A dd re ss # 91

Addr ess #121 Ad dr ess #125= Repeater

= OLM

No Address

No AddressNo Address

No Address

Up to 126addressablenodes pernetwork

Up to 32devices per

segment


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Lp t

Shielding &Grounding

Drop Lines

Termination

CableDistances


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Lp t, chng nhiu v ni t

Ci thin kh nng tng thch in t

Cung cp 1 tr khng thp i vi nhiu

Lm gim nhiu pht ra t Bus

!!!Shield is not always connected to

protective GND within the devices;

therefore, make sure the cable shield

will be connected to GND before itenters or leaves the cabinet

!!!


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Installation Khong cch cp

CableCategory

II

>= 20 cm

>= 10 cm >= 10 cm

>= 50 cm

>= 50 cm

>= 50 cm

CableCategory

I

CableCategory

III

CableCategory

IV


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Installation Kt ni ch T

Mi nhnh hoc ni trc tip vo Bus

Thm cc thit b chng phn x (additional capacitance)

RS485

(A)

(B)

Internal to device

Between device andtrunk line

DeviceRS485

Device


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Installation in tr u cui

Termination for each segment at BOTH ends

Termination works ONLY when supplied with power


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Installation - Termination: Example

OLM OLM OLM

Repeater


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u dy d dng vi cc cng c chnh hng


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Wiring - Easy, when you use the right tools...

4x

3. Insert the end of the cable intothe stripper using your left indexfinger as a limit stop to ensure t hecorrect length is inserted.

1. How to hold the insulationstripper in your right hand.

2. Match up the cable end withthe template so that your leftindex finger is against the endsurface of the tool.

6. With the clamp still closed,pull the stripper off the end ofthe cable.

4. Clamp the cable firmly inthe stripper.

5. Rotate the stripper aroundthe cable 4 times in thedirection of the arrow.


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Wiring - Easy, when you use the right tools...

9. After removing the insulation

from the cores, the cable canbe fitted into the PB connector.

7. The removed insulationremains in the stripper. After

releasing the clamp, theremnants can be removed.

8. Pull the protective foil off thecores.

green wire A

red wire B


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Copper is not the End of the Road...

When is Fiber Optic the Choice?

Kh nng chng nhiu v c lp vi cc ngun khc

Khong cch truyn xa

Line, ring and star configuration possible

Media redundancy


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Fiber Optic - Optical Link Modules (OLM)

OLM

PROFIBUS FO -Glass, PCF or Plastic


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Fiber Optic - Integrated FO Interface

= Optical Bus Terminal (OBT)

PROFIBUS FO -PCF or Plastic


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More Options... Infrared Components

Wireless linking of devices (up to 15m)

Communication with moving devices

Giao tip vi cc thit b thay i

Gim ting n

c lp ni t

More Options... RF Technology

http://www.micro-control.no

http://www.akerstroms.no


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Thanks for your attention!

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