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6 Earthing and shielding

 | Earthing of shielded cables

33

2484950000/00/03.2016

Manual UR67-PROIFBUS

These types of interference usually occur mixed together, but 

they can be categorised as follows:

 

Electromagnetic fields

 

Ripple voltage (50 Hz)

 

Lightning

 

Interference pulses (current, voltage)

 

Transient surge voltages

 

Radio interference

 

ESD (electrostatic discharge)

 

Burst

 

Mains feedback

Another area of concern as regards shield 

contact is the “flow” within the conductor. Tem

-

perature changes caused by the current lead 

to changes in the conductor cross-section. A 

rigid contact can therefore only be partially 

effective. A self-adjusting contact is what is 

really required. Weidmüller's clamping bracket 

products (KLBÜ series) provide the perfect so

-

lution to meet this challenge.

Use of a clamping bracket

Effective shielding

It is important that the shielding is not positioned on the 

earth of the connected component, but on the protective 

earth. In the case of components that are installed in a metal 

housing, the shielding must be positioned to this housing. If 

no earthed housing is available, the shielding is positioned 

on a separate earth.

When installing ground connections on shielding, it is gen-

erally also important that no earth loops are created. The 

smaller the earth loop, the less the danger of the induction 

of interference voltages. It is therefore most suitable to have 

a purely neutral-point installation.

The following sketches show the possible shielding connec-

tions to protective earth.

A one-sided connection of the shielding protects against ca-

pacitive coupling of interference voltages.

System 1

System 2

1

H

F

1M

M

If you use a two-sided shielding connection, make sure that 

compensating current (different earth potentials) does not 

flow through the cable shield.

System 1

System 2

If you wish to avoid the disadvantages associated with creat-

ing an earth loop with two-sided shields, it is recom mended 

you connect one side of the shield through a high imped

-

ance.

System 1

System 2

For longer lengths of shielded cables, such as if a sensor 

must be added to a control panel, a potential difference  

between both end points must not be ignored. 

However, such shield conductors are relatively expensive 

and also require more time in working with them. Another 

possibility would be to place an additional voltage equalising 

cable between the measurement location and the control 

panel. The shield can then be hooked up on both sides.

Содержание UR67-PB-12-8DI-8-30K

Страница 1: ...426340000 UR67 PB 78 8DIDO 12 60M 2426380000 UR67 PB 78 16DI 12 60M 2426390000 UR67 PB 78 16DO 12 60M 2426400000 UR67 PB 12 8DI 8 30K 2426360000 UR67 PB 12 8DIO 8 30K 2426330000 Remote I O System u re...

Страница 2: ...Preparations for assembly 27 5 2 Assembling the module and earthing connection 27 5 3 Attaching the markers 31 5 4 Adjusting the PROFIBUS address 31 5 5 Wiring 31 5 6 Insulation test 31 6 Earthing an...

Страница 3: ...otes with the signal word Attention warn you of hazards which may result in material damage Text next to this arrow are notes which are not relevant to safety but provide important infor mation about...

Страница 4: ...overloading The upstream fuse must be designed such that it does not exceed the maximum load current The maximum permissible load current of the u remote compo nents can be found in the technical dat...

Страница 5: ...UR67 PB 78 16DI 12 60M 16 digital outputs UR67 PB 78 16DO 12 60M The output current is up to 1 6 A per channel The output circuits are galvanically isolated from either the rest of the network and fr...

Страница 6: ...Power Out SAI SK M12 UNI 2330260000 M12 Bus In Power In SAI SK plug M12 1781520000 Markers Module and connection markers are available as accessories for the purpose of item designation All markers c...

Страница 7: ...reverse polaritiy protection Protect the actuator supply with a overcurrent protect tion 6 A mT that will release at least 10 100 ms after a short circuit Diagnosis and status LED LED Indicator Meani...

Страница 8: ...24 V DC 25 3 internally bridged GND GND 4 GND 5 FE FE ATTENTION Product can be destroyed Please do never position the power supply 24 V DC at the signal or data lines pin 1 to pin 4 PROFIBUS DP M12 5...

Страница 9: ...uring the next switch on of the power supply Changing the address Set the new address as described above Interrupt the power supply temporarily The new address set will be adopted during the next swit...

Страница 10: ...e Type 3 acc to IEC 61131 2 Rated input voltage 24 V DC Input current at 24 V DC typ 5 mA Short circuit proof yes Status indicator LED yellow channel wise Diagnosis indicator LED red channel wise Port...

Страница 11: ...2 5 pole Supply of actuators Rated voltage UL 24 V DC Voltage range 24 V DC 25 Potential isolation yes Low voltage threshold typ 17 V Low voltage detection delay 20 ms Reverse polarity protection yes...

Страница 12: ...itiy protection Protect the actuator supply with a overcurrent protect tion 6 A mT that will release at least 10 100 ms after a short circuit Diagnosis and status LED LED Indicator Meaning UL green Ac...

Страница 13: ...V DC 25 5 n c 24 V DC 25 The internal T piece is connected through 5 pole even with the UR67 PB 78 16DI 12 60K module ATTENTION Product can be destroyed Please do never position the power supply 24 V...

Страница 14: ...orarily The new address set will be adopted during the next switch on of the power supply Setting the address via the network Prior to this you have to set the rotary switches to 00 This setting may n...

Страница 15: ...es Status indicator LED yellow channel wise Diagnosis indicator LED green per socket Connection M12 5 pole A coded Outputs Number of digital channels max 16 configurable Channel type NO contact p swit...

Страница 16: ...tion yes Low voltage threshold typ 17 V Low voltage detection delay 20 ms Reverse polarity protection yes Actuator supply indicator UL LED green Connection 7 8 5 pole General data Protection class IP...

Страница 17: ...a fail safe func tion For these modules the behaviour of each output in case of communication failure or interruption can be configured UR67 PB 78 8DIDO 12 60M I O module with 8 digital inputs and 8 d...

Страница 18: ...it off Not connected status off no error LED indicators error messages see chapter 9 Connection assignments I O connections M12 A coded 8DIDO 16DI 16DO 1 3 5 4 2 1 X1 X4 24 V X5 X8 n c 24 V n c 2 X1 X...

Страница 19: ...6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 BUS Rotary switches on the module Set the address with the rotary switches hundred left decade middle unit posit...

Страница 20: ...A coded Outputs Number of digital channels 8 16 Channel type NO contact p switching NO contact p switching Output current typ 1 6 A acc IEC 61131 2 typ 1 6 A acc IEC 61131 2 Rated output current per c...

Страница 21: ...yes yes Low voltage threshold typ 17 V typ 17 V Low voltage detection delay typ 300 ms typ 300 ms Reverse polarity protection yes yes Actuator supply indicator UL LED green red LED green red Connecti...

Страница 22: ...This parameter defines the status of the outputs after a com munication interruption or failure within the PROFINET IO network The following settings are possible Set low The output channel will be di...

Страница 23: ...6DO 12 60M Bit 7 6 5 4 3 2 1 0 Input data Byte n 4B 4A 3B 3A 2B 2A 1B 1A 1A 8A Status output channel A Pin 4 of M12 sockets 1 8 Byte n 1 8B 8A 7B 7A 6B 6A 5B 5A 1B 8B Status output channel B Pin 2 of...

Страница 24: ...l as soon as the power supply UL has normalised Error of system sensor supply US The voltage values of the system sensor supply connections US are monitored overall An error will be reported as soon a...

Страница 25: ...ber 0 15 Channel no 0 socket 1 channel A Channel no 1 socket 1 channel B usw Channel no 15 socket 8 channel B Byte 12 Channel type Bit 001 Error type Only error type 1 is used Indicating a diagnosis i...

Страница 26: ...e failure has been resolved 1 The Bit is always 1 if the DP slave with this PROFIBUS address is present 1 The access monitoring is enabled with this DP slave 1 The DP slave has received the control co...

Страница 27: ...ed by electrostatic discharge Please make sure that personnel and work equipment are adequately earthed Unpack all parts Dispose of all packaging in accordance with the local dis posal guidelines The...

Страница 28: ...DIA 8 US L U UR67 PB 12 8DIO 8 30K x1 x10 x10 x1 x10 x1 IN OUT BUS AUX IN 28 4 40 4 19 23 6 30 12 205 4 197 188 M4x40 1 Nm M4x40 1 Nm M12 PROFIBUS DP M12 M8 M4x30 35 1 Nm M4x30 35 1 Nm 5 0 1 2 3 4 9 8...

Страница 29: ...IA 5 6 2 A DIA B 3 A DIA B 7 8 A DIA B 4 U U S L UR67 PB 78 16DI 12 60K PROFIBUS 16DI Max Ambient Temp 10 60 C 14 140 F 5 0 1 2 3 4 9 8 7 6 5 0 1 2 3 4 9 8 7 6 39 5 13 13 33 39 243 233 233 60 30 5 M4x...

Страница 30: ...V 1 2 3 4 Pin Power Function M12 I O Function Pin 1 2 3 4 5 24V In B GND 0V In A Earth 1 2 3 5 4 female 5 1 2 4 5 3 1 2 3 5 4 n c housing earth VP 5V Line A DGND 0V Line B 1 2 3 4 5 Pin Function AUX X...

Страница 31: ...he place of installation has been disconnected from the power supply Once the module has been mechanically installed the wiring can be carried out in accordance with the wiring plan Ensure compliance...

Страница 32: ...n return as short as possible and using twisted pair wire Far better protection however is provided by completely shielding of all cables This is the most effective measure that can be taken against t...

Страница 33: ...a separate earth When installing ground connections on shielding it is gen erally also important that no earth loops are created The smaller the earth loop the less the danger of the induction of inte...

Страница 34: ...st be ob served during installation of the u remote modules Proper extensive earthing of inactive metal parts Correct shielding of cables and equipment Proper layout of wires cabling Creation of a uni...

Страница 35: ...cabinet housing 4 Busbar The busbar must be connected via the rail holding fixture The cable shields are fixed to the busbar 5 Protective earth conductor rail The protective earth conductor rail must...

Страница 36: ...to have a one sided shield connection for reasons specific to the circuit or equipment the second side of the cable shield can be routed to the local reference potential via a capacitor with short co...

Страница 37: ...Metal housing zinc diecast completely potted 60 mm wide C UR67 PB 78 8DIDO 12 60M UR67 PB 78 16DI 12 60M UR67 PB 78 16DO 12 60M WIUR0E94 GSD If bitmap files for visualising the modules are also suppl...

Страница 38: ...he station SIMATIC 300 is displayed below in the directory tree Click on the station SIMATIC 300 Double click Hardware on the right hand side of the window The Hardware Configuration window opens Hard...

Страница 39: ...spective version or use the mouse to drag it to the second position in the table on the left hand side of the window The Properties Ethernet interface window opens Ethernet interface properties Enter...

Страница 40: ...I O UR67 system open the module line from which you want to add a module e g UR67 PB 78 XXX 12 60M Choosing the module Double click on the designated module line or drag it exactly to the subnet line...

Страница 41: ...elete or Using the right mouse button click on the module in the list and select Delete Setting module parameters A wide range of parameters can be edited for some modules Navigate to the list of comp...

Страница 42: ...ectronic equipment Make sure that disassembled products are properly disposed of When all u remote products reach the end of their life cycle you can return them to Weidm ller and we will arrange for...

Страница 43: ...Yellow Channel A On Red Peripheral error actuator low voltage sensor or actuator short circuit Off Not connected status Off no error Red Check the connected periphery for short circuit check the power...

Страница 44: ...pply Red Check the power supply of the module UL Green Actuator supply OK Red Actuator supply 18 V or 30 V Off No actuator supply Red Check the power supply of the module ACT Yellow Data exchange with...

Страница 45: ...ir industries and markets and know the technological challenges of tomorrow We are therefore continuously developing innovative sustainable and useful solutions for their individual needs Together we...

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